Mitsubishi UFJ Financial (MUFG) 20-F10 Jul 202020 FY Annual report (foreign)Financial data

Company Profile

Cover Page

Cover Page	12 Months Ended
Cover Page	Mar. 31, 2020shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Entity Registrant Name	MITSUBISHI UFJ FINANCIAL GROUP, INC.
Entity Central Index Key	0000067088
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	13,581,995,120
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity File Number	000-54189
Entity Incorporation, State or Country Code	M0
Entity Address, Address Line One	7-1, Marunouchi 2-chome
Entity Address, City or Town	Chiyoda-ku
Entity Address, Country	JP
Entity Address, Postal Zip Code	100-8330
Document Registration Statement	false
Document Accounting Standard	U.S. GAAP
Business Contact [Member]
Document Information [Line Items]
Entity Address, Address Line One	4-5, Marunouchi 1-chome
Entity Address, City or Town	Chiyoda-ku
Entity Address, Country	JP
Entity Address, Postal Zip Code	100-8212
Contact Personnel Name	Masahisa Takahashi
City Area Code	81-3
Local Phone Number	3240-8111
Common Stock [Member]
Document Information [Line Items]
Security 12(b) Title	Common stock, without par value
No Trading Symbol Flag	true
Security Exchange Name	NYSE
American Depositary Shares [Member]
Document Information [Line Items]
Security 12(b) Title	American depositary shares, each of which represents one share of common stock
Trading Symbol	MUFG
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
ASSETS
Cash and due from banks (Note 9)		¥ 33,283,032	¥ 33,924,340
Interest-earning deposits in other banks (Note 9)		45,266,680	40,646,920
Cash, due from banks and interest-earning deposits in other banks		78,549,712	74,571,260
Call loans and funds sold		1,168,515	1,109,995
Receivables under resale agreements (Note 15)		23,995,961	10,974,740
Receivables under securities borrowing transactions (Note 15)		3,443,959	2,758,573
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥7,512,025 and ¥6,709,467 in 2019 and 2020) (including ¥18,597,303 and ¥20,964,024 measured at fair value under the fair value option in 2019 and 2020) (Notes 9, 15, 23 and 31)		47,504,058	40,576,618
Investment securities (Notes 3, 9 and 31):
Available-for-sale debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥6,981,664 and ¥4,490,360 in 2019 and 2020)		34,200,203	33,518,503
Held-to-maturity debt securities (including assets pledged that secured parties are permitted to sell or repledge of ¥160,828 and ¥56,411 in 2019 and 2020) (fair value of ¥4,452,947 and ¥4,177,894 in 2019 and 2020)		4,165,781	4,441,901
Equity securities (including assets pledged that secured parties are permitted to sell or repledge of ¥1,364 and ¥616 in 2019 and 2020) (including ¥6,413,867 and ¥4,850,376 in 2019 and 2020 measured at fair value)		5,385,258	6,977,600
Total investment securities		43,751,242	44,938,004
Loans, net of unearned income, unamortized premiums and deferred loan fees (including assets pledged that secured parties are permitted to sell or repledge of ¥802,185 and ¥648,437 in 2019 and 2020) (Notes 4 and 9)	[1]	118,186,739	116,883,941
Allowance for credit losses (Note 4)		(809,540)	(658,184)
Net loans		117,377,199	116,225,757
Premises and equipment—net (Note 5 and 7)		929,529	973,600
Customers' acceptance liability		167,257	247,996
Intangible assets—net (Notes 2 and 6)		1,239,526	927,196
Goodwill (Notes 2 and 6)		517,626	433,891
Other assets (Notes 7, 8, 9, 13, 14 and 31)		13,108,699	11,491,269
Total assets		331,753,283	305,228,899
LIABILITIES AND EQUITY
Deposits (Notes 9 and 10): Domestic offices, Non-interest-bearing		28,091,421	25,222,218
Deposits (Notes 9 and 10): Domestic offices, Interest-bearing		126,485,629	124,859,036
Deposits (Notes 9 and 10): Overseas offices, Non-interest-bearing		5,290,262	5,220,557
Deposits (Notes 9 and 10): Overseas offices, Interest-bearing		44,087,216	43,978,978
Total deposits		203,954,528	199,280,789
Call money and funds purchased (Notes 9 and 11)		3,668,922	2,450,320
Payables under repurchase agreements (Notes 9, 15 and 16)		31,849,915	25,224,632
Payables under securities lending transactions (Notes 9, 15 and 16)		1,016,874	913,087
Due to trust account and other short-term borrowings (including ¥289,755 and ¥377,133 measured at fair value under the fair value option in 2019 and 2020) (Notes 9, 12 and 31)		19,433,229	9,467,025
Trading account liabilities (Notes 15, 23 and 31)		14,767,433	13,009,492
Bank acceptances outstanding		167,257	247,996
Other short-term borrowings		16,055,482	6,731,073
Long-term debt (including ¥325,808 and ¥304,067 measured at fair value under the fair value option in 2019 and 2020) (Notes 7, 9, 12 and 31)		27,926,763	27,990,543
Other liabilities (Notes 1, 7, 8, 9, 13, 14, 15, 16, 26 and 31)		13,223,846	10,660,267
Total liabilities		316,008,767	289,244,151
Commitments and contingent liabilities (Notes 24 and 26)
Mitsubishi UFJ Financial Group shareholders' equity:
Capital stock (Notes 17 and 18)—common stock authorized, 33,000,000,000 shares; common stock issued, 13,667,770,520 shares and 13,581,995,120 shares at March 31, 2019 and 2020, with no stated value		2,090,270	2,090,270
Capital surplus (Note 18)		5,533,520	5,577,186
Retained earnings (Notes 19 and 33)
Appropriated for legal reserve		239,571	239,571
Unappropriated retained earnings		8,079,530	8,094,026
Accumulated other comprehensive income, net of taxes (Note 20)		(420,417)	(284,269)
Treasury stock, at cost—745,921,774 common shares and 741,772,308 common shares at March 31, 2019 and 2020		(505,987)	(517,236)
Total Mitsubishi UFJ Financial Group shareholders' equity		15,016,487	15,199,548
Noncontrolling interests		728,029	785,200
Total equity		15,744,516	15,984,748
Total liabilities and equity		331,753,283	305,228,899
Consolidated VIEs [Member]
ASSETS
Cash and due from banks (Note 9)		846	7
Interest-earning deposits in other banks (Note 9)		30,047	23,655
Trading account assets (including assets pledged that secured parties are permitted to sell or repledge of ¥7,512,025 and ¥6,709,467 in 2019 and 2020) (including ¥18,597,303 and ¥20,964,024 measured at fair value under the fair value option in 2019 and 2020) (Notes 9, 15, 23 and 31)		695,069	528,690
Investment securities (Notes 3, 9 and 31):
Total investment securities		1,804,459	1,828,194
Net loans		16,072,595	15,545,328
All other assets		244,645	294,212
Total assets		18,847,661	18,220,086
LIABILITIES AND EQUITY
Total deposits
Other short-term borrowings		30,831	20,535
Long-term debt		465,352	490,033
All other liabilities		101,969	62,146
Total liabilities		¥ 598,152	¥ 572,714

[1]	The above table includes loans held for sale of ¥291,794 million and ¥344,790 million at March 31, 2019 and 2020, respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Statement of Financial Position [Abstract]
Trading account assets pledged that secured parties are permitted to sell or repledge	¥ 6,709,467	¥ 7,512,025
Trading account assets measured at fair value under fair value option	20,964,024	18,597,303
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge	4,490,360	6,981,664
Held-to-maturity debt securities pledged that secured parties are permitted to sell or repledge	56,411	160,828
Held-to-maturity debt securities, Fair value	4,177,894	4,452,947
Equity securities pledged that secured parties are permitted to sell or repledge	616	1,364
Equity securities measured at fair value	4,850,376	6,413,867
Loans, net of unearned income, unamortized premiums and deferred loan fees, pledged that secured parties are permitted to sell or repledge	648,437	802,185
Due to trust account and other short-term borrowings measured at fair value under fair value option	377,133	289,755
Long-term debt measured at fair value under fair value option	¥ 304,067	¥ 325,808
Common stock, authorized	33,000,000,000	33,000,000,000
Common stock, issued	13,581,995,120	13,667,770,520
Common stock, stated value
Treasury stock, shares	741,772,308	745,921,774

Consolidated Statements of Inco

Consolidated Statements of Income - JPY (¥) shares in Thousands, ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Interest income:
Loans, including fees (Note 4)		¥ 2,597,932	¥ 2,576,417	¥ 2,271,219
Deposits in other banks		167,267	183,327	126,608
Investment securities:
Interest		242,123	237,378	198,715
Dividends		172,382	160,825	145,186
Trading account assets		489,842	499,724	432,595
Call loans and funds sold		11,286	10,354	10,808
Receivables under resale agreements and securities borrowing transactions		246,311	145,354	73,885
Total		3,927,143	3,813,379	3,259,016
Interest expense:
Deposits		836,081	717,366	514,868
Call money and funds purchased		3,270	3,913	5,248
Payables under repurchase agreements and securities lending transactions		357,382	333,632	165,512
Due to trust account, other short-term borrowings and trading account liabilities		164,907	155,273	93,644
Long-term debt		322,704	307,797	249,483
Total		1,684,344	1,517,981	1,028,755
Net interest income		2,242,799	2,295,398	2,230,261
Provision for (reversal of) credit losses (Note 4)		321,713	34,330	(240,847)
Net interest income after provision for (reversal of) credit losses		1,921,086	2,261,068	2,471,108
Non-interest income:
Fees and commissions income (Note 27)		1,502,052	1,438,578	1,462,792
Foreign exchange losses—net (Note 28)		(281,790)	(95,987)	(49,561)
Trading account profits (losses)—net (Notes 28 and 31)		765,373	168,900	(73,114)
Investment securities gains (losses)—net (Note 3)	[1],[2]	(532,248)	(252,307)	286,903
Equity in earnings of equity method investees—net (Note 14)		282,712	209,732	227,984
Gains on sales of loans (Note 4)		9,956	22,663	16,109
Gain on remeasurement of previously held equity method investment (Note 2)		41,218
Other non-interest income		88,422	103,665	63,978
Total		1,875,695	1,595,244	1,935,091
Non-interest expense:
Salaries and employee benefits (Note 13)		1,242,563	1,175,405	1,165,357
Occupancy expenses—net (Notes 5 and 26)		182,917	179,780	179,100
Fees and commissions expenses		332,033	313,745	297,847
Outsourcing expenses, including data processing		303,632	275,052	276,236
Depreciation of premises and equipment (Note 5)		113,489	98,867	96,180
Amortization of intangible assets (Note 6)		237,328	235,083	234,376
Impairment of intangible assets (Note 6)		3,732	118,108	21,900
Insurance premiums, including deposit insurance		98,441	93,756	91,847
Communications		59,976	59,166	58,067
Taxes and public charges		100,198	95,358	90,210
Impairment of goodwill (Note 6)		383,810
Provision for (reversal of) off-balance sheet credit instruments		(62,279)	38,463	(96,054)
Other non-interest expenses (Notes 5 and 26)		367,721	302,687	329,314
Total		3,363,561	2,985,470	2,744,380
Income before income tax expense		433,220	870,842	1,661,819
Income tax expense (Note 8)		114,505	133,237	407,823
Net income before attribution of noncontrolling interests		318,715	737,605	1,253,996
Net income attributable to noncontrolling interests		12,760	18,960	25,836
Net income attributable to Mitsubishi UFJ Financial Group		305,955	718,645	1,228,160
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 305,955	¥ 718,645	¥ 1,228,160
Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group (Notes 19 and 22):
Basic earnings per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 23.69	¥ 55.03	¥ 92.40
Diluted earnings per common share—Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group	[3]	23.47	54.74	92.10
Cash dividend per common share		¥ 23.50	¥ 21	¥ 18
Weighted average common shares outstanding		12,912,790	13,058,698	13,291,842
Weighted average diluted common shares outstanding		12,912,956	13,059,182	13,293,492

[1]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income from the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[2]	The following credit losses are included in Investment securities gains (losses)—net: Decline in fair value by ¥99 million, ¥596 million and ¥1,467 million; Other comprehensive income—net by ¥15 million, ¥10 million and ¥123 million; Total credit losses by ¥114 million, ¥606 million and ¥1,590 million, for the twelve months ended March 31, 2018, 2019 and 2020, respectively.
[3]	For the fiscal years ended March 31, 2019 and 2020, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Decline in fair value	¥ 1,467	¥ 596	¥ 99
Other comprehensive income—net	123	10	15
Total credit losses	¥ 1,590	¥ 606	¥ 114

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income before attribution of noncontrolling interests		¥ 318,715	¥ 737,605	¥ 1,253,996
Other comprehensive income (loss), net of tax (Note 20):
Net unrealized gains on investment securities	[1]	23,619	88,180	230,308
Net debt valuation adjustments		54,172	9,729	(2,178)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges		10,642	(4,890)	(7,025)
Defined benefit plans (Note 13)		(131,523)	(88,940)	109,838
Foreign currency translation adjustments		(81,065)	(42,212)	(104,778)
Total		(124,155)	(38,133)	226,165
Comprehensive income		194,560	699,472	1,480,161
Net income attributable to noncontrolling interests		12,760	18,960	25,836
Other comprehensive income attributable to noncontrolling interests		11,993	21,209	1,320
Comprehensive income attributable to Mitsubishi UFJ Financial Group		¥ 169,807	¥ 659,303	¥ 1,453,005

[1]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 and 2020.

Consolidated Statements of Equi

Consolidated Statements of Equity - JPY (¥) ¥ in Millions		Total	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Capital Stock [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Capital Surplus [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Retained Earnings Appropriated for Legal Reserve [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Unappropriated Retained Earnings [Member]		Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member]	Mitsubishi UFJ Financial Group Shareholders' Equity [Member]Treasury Stock, at Cost [Member]	Noncontrolling Interests [Member]
Balance at beginning of fiscal year at Mar. 31, 2017				¥ 2,090,270	¥ 5,956,644	¥ 239,571	¥ 3,931,612		¥ 2,281,423	¥ (513,988)	¥ 779,176
Stock-based compensation					315
Net income attributable to Mitsubishi UFJ Financial Group		¥ 1,228,160					1,228,160
Common stock—¥18.00 per share in 2018, ¥21.00 per share in 2019, and ¥23.50 per share in 2020							(240,497)
Losses on sales of shares of treasury stock							(8)
Purchases of shares of treasury stock (Note 18)										(201,102)
Sales of shares of treasury stock										2,098
Retirement of common stock					(190,054)					190,054
Net decrease resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies										66
Initial subscriptions of noncontrolling interests											48,828
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(120,216)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(22,556)
Purchase of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholder (Note 2)					(34,751)						(15,390)
Net income attributable to noncontrolling interests		25,836									25,836
Dividends paid to noncontrolling interests											(21,675)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		226,165							224,845		1,320
Other—net					8,011						310
Balance at end of fiscal year at Mar. 31, 2018		15,645,815	¥ 14,970,182	2,090,270	5,740,165	239,571	4,945,733		2,477,315	(522,872)	675,633
Effect of adopting new guidance \| Foreign Affiliated Company [Member]							(2,605)	[1]	118
Effect of adopting new guidance \| Reclassification of Certain Tax Effects [Member]							29,071		(29,071)
Stock-based compensation					(180)
Net income attributable to Mitsubishi UFJ Financial Group		718,645					718,645
Common stock—¥18.00 per share in 2018, ¥21.00 per share in 2019, and ¥23.50 per share in 2020							(275,551)
Purchases of shares of treasury stock (Note 18)										(161,043)
Sales of shares of treasury stock										3,775
Retirement of common stock					(162,720)					162,720
Net decrease resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies										184
Initial subscriptions of noncontrolling interests											108,235
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(2,830)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(20,497)
Net income attributable to noncontrolling interests		18,960									18,960
Dividends paid to noncontrolling interests											(15,853)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		(38,133)							(59,342)		21,209
Other—net					(79)						343
Balance at end of fiscal year at Mar. 31, 2019		15,984,748	15,199,548	2,090,270	5,577,186	239,571	8,094,026		(284,269)	(517,236)	785,200
Effect of adopting new guidance \| Foreign Affiliated Company [Member]	[2]						1,173
Effect of adopting new guidance \| Recognition and Measurement of Financial Assets and Financial Liabilities [Member]							2,702,242		(2,702,242)
Effect of adopting new guidance \| Recognition of Breakage for Certain Prepaid Stored-Value Products [Member]							1,784
Stock-based compensation					2,596
Net income attributable to Mitsubishi UFJ Financial Group		305,955					305,955
Common stock—¥18.00 per share in 2018, ¥21.00 per share in 2019, and ¥23.50 per share in 2020							(303,742)
Losses on sales of shares of treasury stock							(1)
Purchases of shares of treasury stock (Note 18)										(50,028)
Sales of shares of treasury stock										2,635
Retirement of common stock					(58,626)					58,626
Net decrease resulting from changes in interests in consolidated subsidiaries, consolidated VIEs, and affiliated companies										16
Initial subscriptions of noncontrolling interests											58,228
Transactions between the consolidated subsidiaries and the related noncontrolling interest shareholders											(8,627)
Decrease in noncontrolling interests related to deconsolidation of subsidiaries											(119,797)
Decrease in noncontrolling interests related to disposition of subsidiaries											(3,488)
Net income attributable to noncontrolling interests		12,760									12,760
Dividends paid to noncontrolling interests											(8,487)
Net change during the fiscal year, Other comprehensive income (loss), net of taxes		(124,155)							(136,148)		11,993
Other—net					12,364						247
Balance at end of fiscal year at Mar. 31, 2020		¥ 15,744,516	¥ 15,016,487	¥ 2,090,270	¥ 5,533,520	¥ 239,571	8,079,530		¥ (420,417)	¥ (505,987)	¥ 728,029
Effect of adopting new guidance \| Foreign Affiliated Company [Member]	[3]						(1,825)
Effect of adopting new guidance \| Leases [Member]							¥ (14,883)

[1]	The effect mainly resulted from the adoption of new accounting guidance on “Targeted Improvements to Accounting for Hedging Activities”. See Note 14 for more information.
[2]	The effect resulted from the adoption of new accounting guidance on “Leases”.
[3]	The effect resulted from the adoption of new accounting guidance on “Measurement of Credit Losses on Financial Instruments”.

Consolidated Statements of Eq_2

Consolidated Statements of Equity (Parenthetical) - ¥ / shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash dividends: Common stock, per share	¥ 23.50	¥ 21	¥ 18
Mitsubishi UFJ Financial Group Shareholders' Equity [Member] \| Unappropriated Retained Earnings [Member]
Cash dividends: Common stock, per share	¥ 23.50	¥ 21	¥ 18

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income before attribution of noncontrolling interests		¥ 318,715	¥ 737,605	¥ 1,253,996
Adjustments to reconcile net income before attribution of noncontrolling interests to net cash provided by operating activities:
Depreciation and amortization (Notes 5 and 6)		350,817	333,950	330,556
Impairment of goodwill (Note 6)		383,810
Impairment of intangible assets (Note 6)		3,732	118,108	21,900
Provision for (reversal of) credit losses (Note 4)		321,713	34,330	(240,847)
Employee benefit income for severance indemnities and pension plans (Note 13)		(6,917)	(19,839)	(7,955)
Investment securities (gains) losses—net	[1],[2]	532,248	252,307	(286,903)
Amortization of premiums on investment securities		65,078	78,509	118,863
Changes in financial instruments measured at fair value under fair value option, excluding trading account securities—net (Note 31)		2,894	13,880	(13,456)
Foreign exchange (gains) losses—net		544,763	565,304	(208,398)
Equity in earnings of equity method investees—net		(282,712)	(209,732)	(227,984)
Provision (benefit) for deferred income tax expense		(60,967)	(47,796)	120,595
Decrease (increase) in trading account assets, excluding foreign exchange contracts		(4,902,492)	(2,695,035)	5,653,904
Increase (decrease) in trading account liabilities, excluding foreign exchange contracts		2,217,808	1,370,846	(6,433,948)
Net decrease (increase) in collateral for derivative transactions		(217,864)	(79,338)	259,287
Net decrease (increase) in margin for listed derivative transactions		(279,844)	(87,075)	165,383
Increase in cash collateral for the use of Bank of Japan's settlement infrastructure		(54,018)	(60,462)	(643,568)
Other—net		(292,664)	(77,228)	(425,261)
Net cash provided by (used in) operating activities		(1,355,900)	228,334	(563,836)
Cash flows from investing activities:
Proceeds from sales of Available-for-sale debt securities (including proceeds from debt securities under the fair value option) (Note 3)		60,731,107	31,283,601	30,995,426
Proceeds from maturities of Available-for-sale debt securities (including proceeds from debt securities under the fair value option) (Note 3)		24,335,639	26,448,801	40,011,298
Purchases of Available-for-sale debt securities (including purchases of debt securities under the fair value option) (Note 3)		(87,618,074)	(62,309,072)	(71,593,326)
Proceeds from maturities of Held-to-maturity debt securities		708,068	560,646	1,085,603
Purchases of Held-to-maturity debt securities		(495,346)	(1,192,989)	(1,156,122)
Proceeds from sales and redemption of Equity securities (including proceeds from equity securities under the fair value option)		3,871,908	2,722,948	2,377,333
Purchases of Equity securities (including purchases of equity securities under the fair value option)		(3,129,666)	(2,770,356)	(2,197,171)
Purchase of common stock in Bank Danamon, an equity method investee of BK (Note 2)			(132,335)
Acquisition of Bank Danamon, a subsidiary of BK, net of cash acquired (Note 2)		(243,597)
Acquisition of FSI (formerly, Colonial First State Global Asset Management), subsidiaries of TB, net of cash acquired (Note 2)		(249,615)
Acquisition of DVB Bank's Aviation Finance Division, net of cash acquired (Note 2)		(555,250)
Net decrease (increase) in loans		(1,631,085)	330,198	(169,478)
Net decrease (increase) in call loans, funds sold, and receivables under resale agreements and securities borrowing transactions		(13,714,288)	627,327	4,187,093
Proceeds from sales of premises and equipment		64,400	26,191	12,211
Capital expenditures for premises and equipment		(123,804)	(126,479)	(159,003)
Purchases of intangible assets		(308,081)	(276,880)	(239,755)
Proceeds from sales and dispositions of investments in equity method investees		171,882	161,566	39,710
Proceeds from sales of consolidated VIEs and subsidiaries—net		168,970	64,395	122,962
Other—net		(68,611)	(49,590)	(72,765)
Net cash provided by (used in) investing activities		(18,085,443)	(4,632,028)	3,244,016
Cash flows from financing activities:
Net increase in deposits		5,746,624	3,602,674	5,720,011
Net increase (decrease) in call money, funds purchased, and payables under repurchase agreements and securities lending transactions		8,077,351	(303,042)	3,963,120
Net increase (decrease) in due to trust account and other short-term borrowings		9,944,171	(768,649)	(906,702)
Proceeds from issuance of long-term debt		4,999,531	5,020,636	6,671,031
Repayments of long-term debt		(4,983,073)	(4,236,887)	(5,485,894)
Proceeds from sales of treasury stock		1,235	2,322	1,316
Payments for acquisition of treasury stock (Note 18)		(50,028)	(159,962)	(201,102)
Payments for acquisition of shares of certain subsidiaries from noncontrolling interest shareholders				(318)
Payments for acquisition of shares of Mitsubishi UFJ NICOS from noncontrolling interest shareholders (Note 2)				(50,000)
Dividends paid		(303,728)	(275,581)	(240,514)
Dividends paid by subsidiaries to noncontrolling interests		(8,487)	(15,853)	(21,675)
Other—net		358,922	197,673	(87,067)
Net cash provided by financing activities		23,782,518	3,063,331	9,362,206
Effect of exchange rate changes on cash and cash equivalents		(362,652)	43,975	(188,149)
Net increase (decrease) in cash and cash equivalents		3,978,523	(1,296,388)	11,854,237
Cash and cash equivalents at beginning of fiscal year		74,577,068	75,873,456	64,019,219
Cash and cash equivalents: Cash, due from banks and interest-earning deposits in other banks		78,549,712	74,571,260	75,858,049
Cash and cash equivalents: Restricted cash included in other assets		5,879	5,808	15,407
Cash and cash equivalents at end of fiscal year		78,555,591	74,577,068	75,873,456
Cash paid during the fiscal year for:
Interest		1,759,239	1,488,136	1,040,337
Income taxes, net of refunds		128,124	302,019	265,225
Non-cash investing and financing activities:
Assets acquired under finance lease arrangements (Note 7)		12,754	11,280	¥ 7,111
Assets acquired under operating lease arrangements (Note 7)		46,482
Available-for-sale debt securities transferred to Held-to-maturity debt securities			221,537
Marketable Equity Securities issued by Bank Danamon transferred to investments in subsidiaries and affiliates (Note 2)			¥ 98,934
Acquisition of Bank Danamon, a subsidiary of BK (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents		1,811,160
Fair value of liabilities assumed		1,242,115
Fair value of noncontrolling interests		51,314
Acquisition of FSI (formerly, Colonial First State Global Asset Management), subsidiaries of TB (Note 2):
Fair value of assets acquired, excluding cash and cash equivalents		332,914
Fair value of liabilities assumed		68,519
Acquisition of DVB Bank's Aviation Finance Division (Note 2):
Fair value of assets acquired		572,487
Fair value of liabilities assumed		¥ 2,599

[1]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income from the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[2]	The following credit losses are included in Investment securities gains (losses)—net: Decline in fair value by ¥99 million, ¥596 million and ¥1,467 million; Other comprehensive income—net by ¥15 million, ¥10 million and ¥123 million; Total credit losses by ¥114 million, ¥606 million and ¥1,590 million, for the twelve months ended March 31, 2018, 2019 and 2020, respectively.

Basis of Financial Statements a

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block]	12 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block]	1. BASIS OF FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of Business Mitsubishi UFJ Financial Group, Inc. (“MUFG”) is a holding company for MUFG Bank, Ltd. (formerly, The Bank of Tokyo-Mitsubishi UFJ, Ltd., “MUFG Bank” or “BK”), Mitsubishi UFJ Trust and Banking Corporation (“Mitsubishi UFJ Trust and Banking” or “TB”), Mitsubishi UFJ Securities Holdings Co., Ltd. (“Mitsubishi UFJ Securities Holdings” or “SCHD”), Mitsubishi UFJ NICOS Co., Ltd. (“Mitsubishi UFJ NICOS”), and other subsidiaries. Mitsubishi UFJ Securities Holdings is an intermediate holding company for Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. (“Mitsubishi UFJ Morgan Stanley Securities”). Through its subsidiaries and affiliated companies, MUFG engages in a broad range of financial operations, including commercial banking, investment banking, trust banking and asset management services, securities businesses, and credit card businesses, and it provides related services to individual and corporate customers. See Note 29 Basis of Financial Statements The accompanying consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying consolidated financial statements reflect adjustments which are not included in the consolidated financial statements issued by MUFG and certain of its subsidiaries in accordance with applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. Fiscal years of certain subsidiaries, which end on December 31, and MUFG’s fiscal year, which ends on March 31, have been treated as coterminous. For the fiscal years ended March 31, 2018, 2019 and 2020, the effect of recording intervening events for the three-month periods ended March 31 on MUFG’s proportionate equity in net income of subsidiaries with fiscal years ended on December 31, would have resulted in a decrease of ¥10.76 billion, an increase of ¥19.97 billion, and a de billion to net income attributable to Mitsubishi UFJ Financial Group, respectively. The decrease for the three-month period ended on March 31, 2020 was largely due to an additional allowance for loan losses caused by COVID-19 and goodwill impairment. See Note s 4 and 6 for more information. MUFG concluded that these intervening events do not represent substantial and permanent effects on its consolidated financial statements in any of the years presented. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to management judgment primarily relate to the allowance for credit losses, the valuation of deferred tax assets, the valuation of financial instruments, the accounting for goodwill and intangible assets, impairment of investment securities, the allowances for repayment of excess interest and accrued severance indemnities and pension liabilities. Summary of Significant Accounting Policies Significant accounting policies applied in the accompanying consolidated financial statements are summarized below: Consolidation investees-net. The MUFG Group consolidates VIEs if it has the power to direct the activities of a VIE which most significantly impact the VIE’s economic performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. To assess whether a VIE should be consolidated or not, the MUFG Group considers all factors, such as the purpose and design of the VIE, contractual arrangements, and the MUFG Group’s involvement in both the establishment of the VIE and day-to-day Assets that the MUFG Group holds in an agency, fiduciary or trust capacity are not assets of the MUFG Group and, accordingly, are not included in the accompanying consolidated balance sheets. Cash Flows Translation of Foreign Currency Financial Statements and Foreign Currency Transactions year-end Foreign currency translation gains and losses related to the financial statements of overseas entities of the MUFG Group, net of related income tax effects, are credited or charged directly to Foreign currency translation adjustments, a component of Accumulated other comprehensive income (“Accumulated OCI”). Tax effects of gains and losses on foreign currency translation of the financial statements of overseas entities are not recognized unless it is apparent that the temporary differences will reverse in the foreseeable future. Foreign currency-denominated assets and liabilities are translated into the functional currencies of the individual entities included in consolidation at the respective fiscal year-end Repurchase Agreements, Securities Lending and Other Secured Financing Transactions off-balance off-balance Collateral— mark-to-market Trading Account Securities— 1 Investment Securities— Held-to-maturity Available-for-sale net-of-tax the noncredit component is recognized in Accumulated OCI. In determining other-than-temporary declines in fair value to be recognized as an impairment loss on debt securities, the MUFG Group generally considers factors such as the ability and positive intent to hold the investments for a period of time sufficient to allow for anticipated recovery in fair value, the financial condition of the issuer, the extent of decline in fair value, and the length of time that the decline in fair value below cost has existed. Equity securities include marketable equity investment securities and nonmarketable equity investment securities. Marketable equity investment securities are measured at fair value with unrealized gains or losses reflected in net income. Nonmarketable equity investment securities are primarily measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes. Nonmarketable equity investment securities held by subsidiaries that are investment companies or brokers and dealers, are subject to the specialized industry accounting principles for investment companies and brokers and dealers. Securities of those subsidiaries are carried at their fair values. Interest and dividends on investment securities are reported in Interest income. Dividends are recognized when the shareholder right to receive the dividend is established. Gains and losses on disposition of investment securities are computed using the average cost method and are recognized on the trade date. Derivative Financial Instruments— Derivatives entered into for trading purposes are carried at fair value and are reported as Trading account assets or Trading account liabilities, as appropriate. The fair values of derivative contracts executed with the same counterparty under legally enforceable master netting agreements are presented on a gross basis. Changes in the fair value of such contracts are recognized currently in Foreign exchange gains (losses)—net with respect to foreign exchange contracts and in Trading account profits (losses)—net with respect to interest rate contracts and other types of contracts. Embedded features that are not clearly and closely related to the host contracts and meet the definition of derivatives are separated from the host contracts and measured at fair value unless the contracts embedding the derivatives are measured at fair value in their entirety. Derivatives are also used to manage exposures to fluctuations in interest and foreign exchange rates arising from mismatches of asset Any difference that arises from gains or losses on hedging derivatives offsetting corresponding gains or losses on the hedged items, and gains and losses on derivatives attributable to the risks excluded from the assessment Loans— held-for-sale The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings Corporation (“MUFG Americas Holdings Originated loans are considered impaired when, based on current information and events, it is probable that the MUFG Group will be unable to collect all the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Past due status is determined based on the contractual terms of the loan and the actual number of days since the last payment date, and is considered in determining impairment. Originated loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case loan-by-loan Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, specifically when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. A nonaccrual loan may be restored to an accrual status when interest and principal payments become current and management expects that the borrower will make future contractual payments as scheduled. When a loan is placed on nonaccrual status, interest accrued but not received is generally reversed against interest income. Cash receipts on nonaccrual loans, for which the ultimate collectibility of principal is uncertain, are applied as principal reductions; otherwise, such collections are credited to income. The MUFG Group modifies certain loans in conjunction with its loss-mitigation activities payments received from the borrower. The concessions granted vary by portfolio segment, by program, and by borrower Generally, accruing loans that are modified in a TDR remain as accruing loans subsequent to the modification, and nonaccrual loans remain as nonaccrual. However, if a nonaccrual loan has been modified as a TDR, the borrower is not delinquent under the modified terms, and demonstrates that its financial condition has improved, the MUFG Group may reclassify the loan to accrual status. This determination is generally performed at least once a year through a detailed internal credit rating review process. Once a nonaccrual loan is deemed to be a TDR, the MUFG Group will continue to designate the loan as a TDR even if the loan is reclassified to accrual status. A loan that has been modified into a TDR is considered to be impaired until it matures, is repaid, or is otherwise liquidated, regardless of whether the borrower performs under the modified terms. Because loans modified in TDRs are considered to be impaired, these loans are measured for impairment using the MUFG Group’s established asset-specific allowance methodology, which considers the expected default rates for the modified loans. See “ Allowance for Credit Losses” . In accordance with the guidance on loans and debt securities acquired with deteriorated credit quality, impaired loans acquired for which it is probable that the MUFG Group will be unable to collect all contractual receivables are initially recorded at the present value of amounts expected to be received. For these impaired loans, the related valuation allowances are not carried over or created initially. Accretable yield is limited to the excess of the investor’s estimate of undiscounted cash flows over the investor’s initial investment in the loan. Subsequent increases in cash flows expected to be collected are recognized prospectively through adjustment of the loan’s yield over its remaining life after reduction of any remaining allowance for credit losses for the loan established after its acquisition, if any, while any decrease in such cash flows below those initially expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition is recognized as an impairment. Loan Securitization Allowance for Credit Losses charge-off Key elements relating to the policies and discipline used in determining the allowance for credit losses are credit classification and the related borrower categorization process. The categorization is based on conditions that may affect the ability of borrowers to service their debt, taking into consideration current financial information, historical payment experience, credit documentation, public information, analyses of relevant industry segments or existing economic conditions. In determining the appropriate level of the allowance, the MUFG Group evaluates the probable loss by collateral value, historical loss experience, probability of insolvency and category of loan based on its type and characteristics. The MUFG Group calculates the allowance for credit losses over the loss emergence period that is a time between a loss occurring event and the subsequent confirmation of a loss. The MUFG Group updates these conditions and probable loss on a regular basis and upon the occurrence of unexpected change in the economic environment. The methodologies used to estimate the allowance and the charge-off Commercial segment In the Commercial segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment represents the impairment allowance determined in accordance with the guidance on accounting by creditors for the impairment of a loan. The factors considered by management in determining impairment are the internal credit rating assigned to each borrower which represents the borrower’s creditworthiness determined based on payment status, the number of delinquencies, and the probability of collecting principal and interest payments when due. The impairment of a loan is measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. The formula allowance is applied to loans that are categorized as Normal or Close Watch, excluding The allocated allowance for large groups of smaller-balance homogeneous loans is established through a process that begins with estimates of probable losses inherent in the portfolio. These estimates are based upon various analyses, including historical delinquency and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans categorized as Legally/Virtually Bankrupt, the carrying amount of loans less estimated value of the collateral Residential segment In the Residential segment, the loans are comprised of smaller-balance homogeneous loans that are pooled by their internal credit ratings-based on the number of delinquencies. The loans in this segment are generally secured by collateral. Collateral values are based on internal valuation sources, and the allowance is determined for unsecured amounts. The allowance for the nondelinquent group of loans is determined based on historical loss experience. For delinquent groups of loans, the MUFG Group determines the allowance based on the probability of insolvency by the number of actual delinquencies and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible and charged off. Card segment In the Card segment, the loans are smaller-balance homogeneous loans that are pooled by their internal credit rating based on the number of delinquencies. The allowance for loans in this segment is generally determined based on the probability of insolvency by the number of actual delinquencies and historical loss experience. For calculating the allocated allowance for loans specifically identified for evaluation, impaired loans are aggregated for the purpose of measuring impairment using historical loss factors. Loans that have been modified into a TDR are treated as impaired loans, and the allowance for credit losses is determined using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the amount of loans is generally fully charged off. MUFG Americas Holdings segment In the MUFG Americas Holdings segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, the allocated allowance for large groups of smaller-balance homogeneous loans, and the unallocated allowance. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for consumer loans as well as for smaller balance commercial loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off The unallocated allowance represents an estimate of additional losses inherent in the loan portfolio and is composed of attribution factors, which are based upon management’s evaluation of various conditions that are not directly measured in the determination of the allocated allowance. The conditions used for consideration of the unallocated allowance at each balance sheet date include factors, such as existing general economic and business conditions affecting the key lending areas and products of the MUFG Group, credit quality trends and risk identification, collateral values, loan volumes, underwriting standards and concentrations, specific industry conditions, recent loss experience and the duration of the current business cycle. The MUFG Group reviews these conditions and has an internal discussion with senior credit officers on a quarterly basis. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Commercial loans are generally considered uncollectible based on an evaluation of the financial condition of a borrower as well as the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Consumer loans are generally considered uncollectible based on past due status and the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Krungsri segment In the Krungsri segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for smaller balance loans such as housing loans, credit card loans, and personal loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Loans to customers are charged off when they are determined to be uncollectible considering the financial condition of a borrower. Allowance for Off-Balance Sheet Credit Instruments off-balance Premises and Equipment Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 3 to 39 Maintenance, repairs and minor improvements are charged to operations as incurred. Major improvements are capitalized. Net gains or losses on dispositions of premises and equipment are included in Other non-interest Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of an asset to be held and used is measured by a comparison of the carrying amount to future undiscounted net cash flows expected to be generated by the asset. If an asset is considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value. For purposes of recognition and measurement of an impairment loss, a long-lived asset or assets are grouped with other assets and liabilities at the lowest level with independent and identifiable cash flows. Assets to be disposed of by sale are reported at the lower of the carrying amount or fair value less estimated cost to sell. Asset retirement obligations related to restoration of certain leased properties upon lease termination are recorded in Other liabilities with a corresponding increase in leasehold improvements. The amounts represent the present value of expected future cash flows associated with returning such leased properties to their original condition. The difference between the gross and present value of expected future cash flows is accreted over the life of the related leases as a non-interest Goodwill Goodwill arising from a business combination is not amortized but is tested at least annually for impairment. Goodwill is recorded at a designated reporting unit level for the purpose of assessing impairment. A reporting unit is an operating segment, or an identified business unit one level below an operating segment. An impairment loss is recognized to the extent that the carrying amount of a reporting unit exceeds its fair value, but not exceeding the total amount of goodwill allocated to that reporting unit. Intangible assets Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 9 to 16 Straight-line Customer relationships 3 to 27 Straight-line, Declining-balance Trade names 4 to 40 Straight-line Intangible assets having indefinite useful lives are not amortized but are subject to annual impairment tests. An impairment exists if the carrying value of an indefinite-lived intangible asset exceeds its fair value. For other intangible assets subject to amortization, an impairment is recognized if the carrying amount is not recoverable and the carrying amount exceeds the fair value of the intangible asset. The MUFG Group capitalizes certain costs associated with the acquisition or development of internal-use internal-use Accrued Severance and Pension Liabilities employee benefits while other components of net pension benefit/cost are charged to Other non-interest Long-Term Debt Obligations under Guarantees Allowance for Repayment of Excess Interest Fees and Commissions The following is an explanation of the MUFG Group’s key revenue from contracts with customers and the timing of its recognition. Fees and commissions on deposits consist of fees and commissions charged for transaction-based services such as usage of automated teller machines and withdrawal services, and for periodic account maintenance services. The MUFG Group’s performance obligation for transaction-based services is satisfied and the fees and commissions are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction, while the MUFG Group’s performance obligation for maintenance services is satisfied and the fees and commissions are recognized over the course of each month. Fees and commissions on remittances and transfers consist of fees and commissions charged for settlement transactions such as domestic fund remittances, including electronic banking transactions, and are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction. Fees and commissions on foreign trading business consist of fees and commissions charged for fund collection and trade-related financing services related to foreign trading business, and are recognized in the period in which the related service is provided. If they arise from foreign trading business activities under which the customer consumes the related services at a point in time (e.g. foreign exchange fees), such fees are recognized at the same point in time. If they arise from foreign trading business activities under which the customer consumes the related services equally over the period of service (e.g. commercial letters of credit), such fees are recognized over the same period. Fees and commissions on credit card business consist of fees and commissions such as interchange income, royalty and other service charges from franchisees. Interchange income from the credit card business is recognized as processed transactions are settled through the associated payment networks, while royalty and other service charges related to the credit card business are recognized on a straight-line basis over the period of service. Fees and commissions on security-related services primarily consist of fees and commissions for sales and transfers of securities including investment funds, underwriting, brokerage and advisory services, arrangement fees on securitizations, and agency services for the calculation and payment of dividends. Fees and commissions on security-related services are recognized in the period in which the related service is provided. If they arise from security-related services under which the customer consumes the related services at a point in time (e.g. sales and transfers of securities are executed at the customer’s direction; underwritings of debt and equity securities or securitizations are completed at the trade date; advice is provided to the clients; and dividends are calculated and then paid to investors), such fees are recognized at the same point in time. If they arise from security-related services under which the customer consumes the related services equally over the period of service (e.g. retainer fees on M&A advisory fees), such fees are recognized over the same period. The advisory fees which are paid upon meeting certain performance goals (e.g. success fees on M&A advisory fees) are recognized at the point in time when the performance goals are met. Fees and commissions on administration and management services for investment funds primarily consist of fees and commissions earned from administrating and managing investment funds, including assets under management on behalf of clients. Such fees and commissions are recognized equally over the period of service at the amount calculated primarily based on the outstanding amount of each entrusted asset, the percentage of fees, and the extent of the service provided to administer the investment funds. Trust fees consist primarily of fees earned by fiduciary asset management and administration services for corporate pension plans and investment funds, and are recognized on an accrual basis, generally based on the volume of trust assets under management and/or the operating performance for the accounting period of each trust account. With respect to the trust accounts with a guarantee of trust principal, trust fees are determined based on the profits earned by individual trust accounts during the trust accounting period, less deductions, including provision for reserves, impairment for individual investments and dividends paid to beneficiary certificate holders. The trust fees for these trust accounts are accrued based on the amounts expected to be earned during the accounting period of each trust account. Guarantee fees consist of fees related to the guarantee business such as providing guarantees on residential mortgage loans and other loans, and are recognized over the contractual periods of the respective guarantees. Insurance commissions consist of commissions earned from third-party insurance companies for marketing and selling insurance products and for the maintenance of insurance contracts. The former is recognized at the point in time which the associated service is fulfilled as the insurance contract is established by the insurance company, while the latter is recognized over the insurance period. Fees and comm

Business Developments _Text Blo

Business Developments [Text Block]	12 Months Ended
Business Developments [Text Block]	Mar. 31, 2020
Business Combinations [Abstract]
Business Developments [Text Block]	2. BUSINESS DEVELOPMENTS Mitsubishi UFJ NICOS Became a Wholly-Owned Subsidiary On May 15, 2017, MUFG and its subsidiary Mitsubishi UFJ NICOS entered into a share exchange agreement for MUFG to acquire the remaining 15.02% ownership of Mitsubishi UFJ NICOS by agreeing, on October 2, 2017, to pay ¥50,000 million cash to the only holder of Mitsubishi UFJ NICOS common stock other than MUFG. The transaction was accounted for as a non-cancellable Acquisition of shares in Bank Danamon in Indonesia On December 26, 2017, MUFG Bank entered into conditional share purchase agreements with Asia Financial (Indonesia) Pte. Ltd. (“AFI”) and other affiliated entities (the “Sellers”) to acquire their 73.8% equity interests in an Indonesian bank, PT Bank Danamon Indonesia, Tbk. (“Danamon”), subject to applicable regulatory approvals. Danamon, which was established in 1956, is the fifth most profitable Indonesian commercial bank in terms of net income. Danamon provides banking and financial products and services to consumer, small and medium enterprise (“SME”) and corporate customers, with a network of around 900 offices in Indonesia. MUFG Bank intends to establish an integrated and comprehensive services platform that serves as a gateway for clients wishing to make inroads into Indonesia’s growing economy as well as local companies seeking to expand into the region. This investment is also expected to strategically allow MUFG Bank to benefit from Danamon’s foothold in the developing local retail and SME segments to deepen its banking franchise in Indonesia. This strategic investment by MUFG Bank was executed through three steps (the “Proposed Transaction”), and the completion of the Proposed Transaction resulted in MUFG Bank becoming the largest shareholder in Danamon and Danamon becoming a consolidated subsidiary of MUFG Bank. In Step 1, MUFG Bank acquired an initial 19.9% equity interest in Danamon from the Sellers on December 29, 2017, based on a price of IDR 8,323 (approximately ¥70 (1) (1) Available-for-sale In Step 2, MUFG Bank acquired an additional 20.1% equity interest in Danamon from the Sellers on August 3, 2018, based on a price of IDR 8,921 (approximately ¥69 (2) (2) In Step 3, MUFG Bank acquired an additional 54.0% equity interest in Danamon from AFI and other shareholders on April 29, 2019, based on a price of IDR 9,590 (approximately ¥77 (3) million which is included in Gain on remeasurement of previously held equity method investment in the accompanying consolidated statements of income for the fiscal year ended March 31, 2020. During the fiscal year ended March 31, 2020, the MUFG Group incurred million of acquisition-related costs. These expenses are included in Other non-interest ¥4,553 million for the fiscal year ended March 31, 2020. In addition, MUFG Bank acquired an additional 92.1% equity interest (3) On May 1, 2019, MUFG Bank made BNP merged into Danamon, acquiring an additional equity interest in Danamon in exchange for its equity interest in BNP, which resulted in MUFG Bank holding 94.1% equity interest in Danamon. Notes: (1) Calculated based on the exchange rate of IDR1 = ¥0.0084 (2) Calculated based on the exchange rate of IDR1 = ¥0.0077 (3) Calculated based on the exchange rate of IDR1 = ¥0.0080 The following table summarizes the estimated fair values of the assets acquired and liabilities assumed of Danamon and its subsidiaries as of the acquisition date: (in millions) Loans ¥ 1,086,638 Intangible assets (1) 146,899 Total assets 1,728,480 Deposits—Total deposits 915,075 Total liabilities 1,242,115 Note: (1) Intangible assets with a agents with a a Included in the table above are loans with fair values totaling ¥1,068,906 million, which were not subject to the guidance on loans and debt securities acquired with deteriorated credit quality. As of the acquisition date, the gross contractual amounts receivable for these loans totaled ¥1,082,422 million, of which ¥34,363 million is not expected to be collected. Pro forma statements of income The following unaudited pro forma statements of income present the result of operations for Danamon Fiscal years ended 2019 2020 (in millions) Statement of income data: Net interest income ¥ 130,540 ¥ 119,818 Non-interest 30,857 30,852 Net income attributable to Mitsubishi UFJ Financial Group 16,083 3,206 The unaudited pro forma statements of income include the pro forma adjustments to reflect the impact of amortizing certain acquisition accounting adjustments such as intangible assets subject to amortization of ¥11,445 million and ¥11,299 million for the fiscal years ended March 31, 2019 and 2020, respectively. Acquisition of Colonial First State Global Asset Management On August 2, 2019, Mitsubishi UFJ Trust and Banking acquired 100% of the shares in each of the of ¥105,973 million with a a The MUFG Group is seeking the opportunities to enhance its competitive edge as well as expanding its client base globally in asset management business. The acquisition of FSI is a milestone to strengthen its capability and that is the reason such goodwill was paid which is allocated to the segment of Asset Management & Investor Services Business Group. The MUFG Group will continue to respond to customer expectations by leveraging the advantages and brands of FSI as well as the MUFG Group’s original asset management arms, aiming to become an asset management service provider with a global presence. The assets acquired and liabilities assumed were recorded at their estimated fair values on the acquisition date. During the fiscal year ended March 31, 2020, the MUFG Group incurred ¥3,775 million of acquisition-related costs. These expenses are included in Other non-interest million. The revenue and net . Pro forma statements of income The following unaudited pro forma statements of income present the results of operations for FSI Fiscal years ended 2019 2020 (in millions) Statement of income data: Non-interest ¥ 77,323 ¥ 78,475 Net income attributable to Mitsubishi UFJ Financial Group 16,051 6,047 The unaudited pro forma statements of income include the pro forma adjustments to reflect the impact of amortizing certain acquisition accounting adjustments relating to intangible assets subject to amortization of ¥6,622 million and ¥5,979 million for the fiscal years ended March 31, 2019 and 2020, respectively. Acquisition of DVB Bank SE’s Aviation Finance Division On March 1, 2019, MUFG Bank and its consolidated subsidiary, BOT Lease Co., Ltd. (“BOT Lease”), entered into an agreement with DVB Bank SE (“DVB”) to transfer DVB’s aviation finance division to MUFG Bank and BOT Lease. The purpose of the transaction is to improve the MUFG Group’s ability to offer bespoke solutions to its clients by enhancing its global corporate investment banking business platform in terms of higher returns, diversifying its portfolio, broadening its customer base, and securing experienced professionals. On November 18, 2019, MUFG Bank acquired DVB’s most of aviation finance client lending portfolio, employees, and other part of the operation infrastructure for ¥555 billion in cash. MUFG Bank recorded goodwill of ¥32,591 million. In addition, DVB’s aviation investment management and asset management businesses will be transferred to a newly established subsidiary of BOT Lease, subject to applicable regulatory and other approvals and certain conditions. The following table summarizes the estimated fair values of the assets acquired and liabilities as of the acquisition date: (in millions) Loans ¥ 515,933 Total assets 522,797 Total liabilities 138 Pro forma statements of income The following unaudited pro forma statements of income present the result of operations for DVB’s aviation finance division as if the acquisition of DVB’s aviation finance division had occurred on April 1, 201 8 Fiscal years ended 2019 2020 (in millions) Statement of income data: Net interest income ¥ 4,825 ¥ 4,868 Non-interest 430 430 Net income attributable to Mitsubishi UFJ Financial Group 48 77

Investment Securities _Text Blo

Investment Securities [Text Block]	12 Months Ended
Investment Securities [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Investment Securities [Text Block]	3. INVESTMENT SECURITIES The following tables present the amortized cost, gross unrealized gains and losses, and fair value of Available-for-sale Held-to-maturity At March 31, 2019: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,748,558 ¥ 330,115 ¥ 977 ¥ 24,077,696 Japanese prefectural and municipal bonds 2,203,978 22,593 5 2,226,566 Foreign government and official institution bonds 2,648,874 18,099 25,554 2,641,419 Corporate bonds 1,117,302 14,251 822 1,130,731 Residential mortgage-backed securities 1,635,220 1,469 21,338 1,615,351 Commercial mortgage-backed securities 132,996 310 2,351 130,955 Asset-backed securities 1,494,629 10,846 2,553 1,502,922 Other debt securities (1) 192,930 2,851 2,918 192,863 Total ¥ 33,174,487 ¥ 400,534 ¥ 56,518 ¥ 33,518,503 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,701 ¥ 41,619 ¥ — ¥ 1,142,320 Foreign government and official institution bonds 138,731 193 212 138,712 Residential mortgage-backed securities 910,990 1,209 21,202 (2) 890,997 Commercial mortgage-backed securities 160,267 1,903 2,032 (2) 160,138 Asset-backed securities 2,131,212 1,415 11,847 2,120,780 Total ¥ 4,441,901 ¥ 46,339 ¥ 35,293 ¥ 4,452,947 Notes: (1) Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At March 31, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,308,538 ¥ 185,302 ¥ 30,961 ¥ 23,462,879 Japanese prefectural and municipal bonds 2,938,743 16,279 2,202 2,952,820 Foreign government and official institution bonds 2,936,110 107,406 6,028 3,037,488 Corporate bonds 1,261,586 12,445 1,205 1,272,826 Residential mortgage-backed securities 1,460,641 3,083 4,331 1,459,393 Commercial mortgage-backed securities 379,234 6,110 3,089 382,255 Asset-backed securities 1,461,083 9,516 1,123 1,469,476 Other debt securities (1) 161,832 3,190 1,956 163,066 Total ¥ 33,907,767 ¥ 343,331 ¥ 50,895 ¥ 34,200,203 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,574 ¥ 29,856 ¥ — ¥ 1,130,430 Foreign government and official institution bonds 151,555 243 689 151,109 Residential mortgage-backed securities 737,242 10,478 3,012 (2) 744,708 Commercial mortgage-backed securities 146,039 2,993 317 (2) 148,715 Asset-backed securities 2,030,371 277 27,716 2,002,932 Total ¥ 4,165,781 ¥ 43,847 ¥ 31,734 ¥ 4,177,894 Notes: (1) Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity Contractual Maturities The amortized cost and fair values of Held-to-maturity Available-for-sale Held-to-maturity Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 24,013 ¥ 24,056 ¥ 11,827,106 Due from one year to five years 1,202,901 1,235,096 10,833,597 Due from five years to ten years 591,471 587,205 5,794,878 Due after ten years 2,347,396 2,331,537 5,744,622 Total ¥ 4,165,781 ¥ 4,177,894 ¥ 34,200,203 Realized Gains and Losses For the fiscal year ended March 31, 2018, gross realized gains on sales of Available-for-sale Available-for-sale For the fiscal years ended March 31, 2019 and 2020, gross realized gains on sales of Available-for-sale Available-for-sale respectively . Other-than-temporary Impairments of Investment Securities For the fiscal year ended March 31, 2018, losses resulting from impairment of investment securities to reflect the decline in value considered to be other-than-temporary were ¥8,196 million, which were included in Investment Available-for-sale For the fiscal years ended March 31, 2019 and 2020, losses resulting from impairment of investment securities to reflect the decline in value considered to be other-than-temporary were ¥606 million and ¥1,590 million, respectively, which were included in Investment securities gains (losses)—net in the accompanying consolidated statements of income. These losses were recorded from Available-for-sale Available-for-sale Gross Unrealized Losses and Fair Value The following tables show the gross unrealized losses and fair value of Available-for-sale Held-to-maturity Less than 12 months 12 months or more Total At March 31, 2019: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,149,302 ¥ 976 ¥ 5,599 ¥ 1 ¥ 4,154,901 ¥ 977 39 Japanese prefectural and municipal bonds 12,772 5 — — 12,772 5 4 Foreign government and official institution bonds 397,718 1,125 1,160,671 24,429 1,558,389 25,554 179 Corporate bonds 163,615 776 79,758 46 243,373 822 92 Residential mortgage-backed securities 316,942 1,757 648,353 19,581 965,295 21,338 536 Commercial mortgage-backed securities 42,126 678 57,167 1,673 99,293 2,351 104 Asset-backed securities 164,738 2,553 — — 164,738 2,553 87 Other debt securities 77,660 549 37,027 2,369 114,687 2,918 38 Total ¥ 5,324,873 ¥ 8,419 ¥ 1,988,575 ¥ 48,099 ¥ 7,313,448 ¥ 56,518 1,079 Held-to-maturity Foreign government and official institution bonds ¥ — ¥ — ¥ 55,084 ¥ 212 ¥ 55,084 ¥ 212 10 Residential mortgage-backed securities 74,180 1,199 798,165 20,003 872,345 21,202 457 Commercial mortgage-backed securities 3,154 37 155,011 1,995 158,165 2,032 32 Asset-backed securities 1,423,048 10,196 241,233 1,651 1,664,281 11,847 102 Total ¥ 1,500,382 ¥ 11,432 ¥ 1,249,493 ¥ 23,861 ¥ 2,749,875 ¥ 35,293 601 Less than 12 months 12 months or more Total At March 31, 2020: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 11,781,600 ¥ 30,961 ¥ — ¥ — ¥ 11,781,600 ¥ 30,961 202 Japanese prefectural and municipal bonds 935,540 2,202 — — 935,540 2,202 340 Foreign government and official institution bonds 564,620 5,481 114,407 547 679,027 6,028 153 Corporate bonds 522,941 1,191 25,228 14 548,169 1,205 154 Residential mortgage-backed securities 114,057 530 388,064 3,801 502,121 4,331 402 Commercial mortgage-backed securities 182,887 3,087 1,304 2 184,191 3,089 39 Asset-backed securities 189,775 503 86,605 620 276,380 1,123 94 Other debt securities 53,070 132 30,657 1,824 83,727 1,956 24 Total ¥ 14,344,490 ¥ 44,087 ¥ 646,265 ¥ 6,808 ¥ 14,990,755 ¥ 50,895 1,408 Held-to-maturity Foreign government and official institution bonds ¥ 55,746 ¥ 689 ¥ — ¥ — ¥ 55,746 ¥ 689 9 Residential mortgage-backed securities 108,478 1,033 360,841 1,979 469,319 3,012 281 Commercial mortgage-backed securities 10,281 32 133,791 285 144,072 317 31 Asset-backed securities 637,201 8,536 1,259,720 19,180 1,896,921 27,716 77 Total ¥ 811,706 ¥ 10,290 ¥ 1,754,352 ¥ 21,444 ¥ 2,566,058 ¥ 31,734 398 Evaluating Investment Securities for Other-than- temporary Impairments The following describes the nature of the MUFG Group’s investments and the conclusions reached in determining whether the unrealized losses were temporary or other-than-temporary. Corporate bonds As of March 31, 2020, unrealized losses associated with corporate bonds were primarily related to private placement bonds issued by Japanese non-public Residential mortgage-backed securities As of March 31, 2020, unrealized losses on these securities were primarily driven by securities guaranteed by a U.S. government agency or a government-sponsored agency which are collateralized by residential mortgage loans. Unrealized losses mainly resulted from changes in interest rates and not from changes in credit quality. The MUFG Group determined through analysis that no OTTI was identified on such securities as of March 31, 2020 and no impairment loss has been recorded because the strength of the issuers’ guarantees through direct obligations or support from the U.S. government is expected to be sufficient to recover Asset-backed securities As of March 31, 2020, unrealized losses on these securities were primarily driven by certain collateralized loan obligations (“CLOs”), highly illiquid securities for which fair values are difficult to determine. Unrealized losses arise from widening credit spreads, deterioration of the credit quality of the underlying collateral, uncertainty regarding the valuation of such securities and the market’s view of the performance of the fund managers. When the fair value of a security is lower than its amortized cost or when any security is subject to a deterioration in credit rating, the MUFG Group undertakes a cash flow analysis of the underlying collateral to estimate the OTTI and confirms the intent and ability to hold these securities until recovery. Based on the analysis performed, no OTTI was identified as of March 31, 2020 and no impairment loss has been recorded. Other debt securities As of March 31, 2020, other debt securities primarily consist of private placement debt conduit bonds, which are not rated by external credit rating agencies. The unrealized losses on these bonds result from a higher return on capital expected by the secondary market compared with the return on capital required at the time of origination when the bonds were purchased. The MUFG Group estimates loss projections for each security by assessing the underlying collateral of each security. The MUFG Group estimates the portion of loss attributable to credit based on the expected cash flows of the underlying collateral using estimates of current key assumptions such as probability of default and loss severity. Cash flow analysis of the underlying collateral provides an estimate of OTTI, which is performed when the fair value of a security is lower than its amortized cost and potential impairment is identified. Based on the analysis, no OTTI losses were recorded in the accompanying consolidated statements of income. Marketable equity securities included in Equity Securities The MUFG Group determines whether unrealized losses on marketable equity securities are temporary based on its ability and positive intent to hold the investments for a period of time sufficient to allow for any anticipated recovery and the results of its review conducted to identify and evaluate investments that have indications of possible impairment. Impairment is evaluated considering various factors, and their relative significance varies from case to case. The MUFG Group’s review includes, but is not limited to, consideration of the following factors: The length of time that the fair value of the investment has been below cost The extent to which the fair value of investments has been below cost as of the end of the reporting period The financial condition and near-term prospects of the issuer financial At March 31, 2018, unrealized losses on marketable equity securities which have been in a continuous loss position are considered temporary based on the evaluation as described above. OTTI of marketable equity securities is eliminated according to new guidance on recognition and measurement of financial assets and financial liabilities. Equity Securities The following table presents net realized losses on sales of equity securities, and net unrealized losses on equity securities still held at March 31, 2019 and 2020 : Fiscal years ended 2019 2020 (in millions) Net losses recognized during the period (1) ¥ (278,746 ) ¥ (639,813 ) Less: Net losses recognized during the period on equity securities sold during the period (3,303 ) (37,541 ) Net unrealized losses recognized during the reporting period still held at the reporting date ¥ (275,443 ) ¥ (602,272 ) Note: (1) Included in Investment securities gains (losses)—net. Measurement Alternative of Equity Securities The following table presents the carrying value of nonmarketable equity securities held at March 31, 2019 and 2020 : 2019 2020 (in millions) Measurement alternative balance ¥ 563,733 ¥ 534,882 The related adjustments for these securities for the fiscal years ended March 31, 2019 and 2020 were as follow : Fiscal years ended 2019 2020 (in millions) Measurement alternative impairment losses (1)(4) ¥ (2,292 ) ¥ (3,099 ) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ — ¥ (953 ) Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ ¥ Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities. (4) The cumulative impairment losses at March 31, 2019 and 2020 were ¥2,292 million and ¥5,007 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2019 and 2020 were nil and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2019 and 2020 were ¥53,077 million and ¥34,466 million, respectively.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses [Text Block]	12 Months Ended
Loans and Allowance for Credit Losses [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Loans and Allowance for Credit Losses [Text Block]	4. LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans at March 31, 2019 and 2020 by domicile and industry of the borrower are summarized below. Classification of loans by industry is based on the industry segment loan classifications as defined by the Bank of Japan. 2019 2020 (in millions) Domestic: Manufacturing ¥ 11,153,996 ¥ 11,448,778 Construction 717,664 733,212 Real estate 11,706,419 12,054,671 Services 2,653,191 2,585,111 Wholesale and retail 7,643,397 7,504,561 Banks and other financial institutions (1) 5,213,020 5,161,093 Communication and information services 1,510,596 1,572,344 Other industries 8,756,483 8,673,871 Consumer 15,802,024 15,319,721 Total domestic 65,156,790 65,053,362 Foreign: Governments and official institutions 841,695 726,347 Banks and other financial institutions (1) 11,641,373 11,788,225 Commercial and industrial 31,951,169 32,565,030 Other 7,597,502 8,404,062 Total foreign 52,031,739 53,483,664 Unearned income, unamortized premiums—net and deferred loan fees—net (304,588 ) (350,287 ) Total (2) ¥ 116,883,941 ¥ 118,186,739 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥291,794 million and ¥344,790 million at March 31, 2019 and 2020, respectively. The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings, Krungsri, and Other based on the grouping used by the MUFG Group to determine the allowance for credit losses. See Note 1 for further information. Nonaccrual Loans Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. See Note 1 for further information. The nonaccrual loans by class at March 31, 2019 and 2020 are shown below: 2019 2020 (in millions) Commercial Domestic ¥ 272,777 ¥ 312,972 Manufacturing 65,896 93,776 Construction 9,813 8,484 Real estate 23,152 21,790 Services 26,188 51,195 Wholesale and retail 94,531 94,037 Banks and other financial institutions 898 994 Communication and information services 11,955 10,539 Other industries 25,406 20,234 Consumer 14,938 11,923 Foreign 111,002 127,001 Residential 68,499 63,998 Card 61,419 61,172 MUAH 46,549 35,840 Krungsri 127,424 149,732 Other — 27,754 Total (1) ¥ 687,670 ¥ 778,469 Note: (1) The above table does not include loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively, and loans acquired with deteriorated credit quality of ¥6,284 million and ¥25,427 million at March 31, 2019 and 2020, respectively. Impaired Loans The MUFG Group’s impaired loans primarily include nonaccrual loans and TDRs. The following table shows information about impaired loans by class at March 31, 2019 and 2020: Recorded Loan Balance At March 31, 2019: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 560,474 ¥ 157,465 ¥ 717,939 ¥ 759,399 ¥ 227,004 Manufacturing 349,597 28,189 377,786 384,306 92,919 Construction 8,366 5,975 14,341 14,779 6,574 Real estate 20,848 29,961 50,809 55,943 5,704 Services 30,239 13,020 43,259 46,838 20,059 Wholesale and retail 118,253 45,620 163,873 175,714 84,503 Banks and other financial institutions 1,012 21 1,033 1,033 830 Communication and information services 8,794 6,929 15,723 16,587 6,817 Other industries 13,772 17,989 31,761 38,342 6,874 Consumer 9,593 9,761 19,354 25,857 2,724 Foreign 127,521 34,484 162,005 183,133 85,966 Loans acquired with deteriorated credit quality 8,136 — 8,136 14,990 5,450 Residential (4) 97,176 6,495 103,671 120,526 14,357 Card (4) 64,691 330 65,021 72,226 21,829 MUAH (4) 46,552 23,208 69,760 83,300 8,294 Krungsri (4) 57,066 26,193 83,259 90,377 28,254 Total (3) ¥ 961,616 ¥ 248,175 ¥ 1,209,791 ¥ 1,323,951 ¥ 391,154 Recorded Loan Balance At March 31, 2020: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 598,737 ¥ 147,890 ¥ 746,627 ¥ 784,298 ¥ 268,070 Manufacturing 375,716 32,057 407,773 414,091 119,070 Construction 6,609 5,261 11,870 12,023 5,026 Real estate 20,739 28,928 49,667 55,303 6,649 Services 55,293 13,114 68,407 72,708 40,987 Wholesale and retail 113,288 38,897 152,185 160,508 80,996 Banks and other financial institutions 1,069 39 1,108 1,262 855 Communication and information services 7,971 5,808 13,779 14,698 6,009 Other industries 10,558 16,449 27,007 33,229 6,434 Consumer 7,494 7,337 14,831 20,476 2,044 Foreign 141,897 56,464 198,361 220,283 96,009 Loans acquired with deteriorated credit quality 12,906 — 12,906 19,947 4,767 Residential (4) 88,075 4,822 92,897 107,629 12,770 Card (4) 65,240 280 65,520 72,714 19,799 MUAH (4) 33,884 33,835 67,719 84,737 5,977 Krungsri ( 4) 68,126 30,833 98,959 106,265 30,198 Other (4) 22,749 1,091 23,840 26,091 6,152 Total (3) ¥ 1,031,614 ¥ 275,215 ¥ 1,306,829 ¥ 1,421,964 ¥ 443,742 Notes: (1) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ original effective interest rate, loans’ observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan. (2) Included in impaired loans at March 31, 2019 and 2020 are accrual TDRs as follows: ¥497,013 million and ¥505,681 million—Commercial; ¥34,449 million and ¥28,450 million—Residential; ¥26,183 million and ¥25,492 million—Card; ¥33,155 million and ¥42,910 million—MUFG Americas Holdings; ¥26,851 million and ¥35,226 million—Krungsri; and nil and ¥8,401 million—Other, respectively. (3) In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively. (4) Impaired Loans for Residential, Card, MUAH, Krungsri and Other segments in the above table include loans acquired with deteriorated credit quality. The following table shows information regarding the average recorded loan balance and recognized interest income on impaired loans for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 Average Recognized Average Recognized Average Recognized (in millions) Commercial Domestic ¥ 918,093 ¥ 9,441 ¥ 766,847 ¥ 12,383 ¥ 726,794 ¥ 8,722 Manufacturing 472,081 3,787 387,725 6,057 387,470 4,085 Construction 19,465 281 15,721 291 13,093 218 Real estate 74,087 1,146 57,850 1,069 48,740 731 Services 59,916 794 48,945 1,044 58,704 759 Wholesale and retail 186,356 2,347 171,687 2,848 157,751 2,195 Banks and other financial institutions 1,729 8 1,330 8 1,094 6 Communication and information services 25,461 388 22,478 491 14,804 322 Other industries 50,377 215 39,178 234 28,345 170 Consumer 28,621 475 21,933 341 16,793 236 Foreign 209,297 4,244 159,999 3,127 174,831 3,013 Loans acquired with deteriorated credit quality 8,591 492 7,814 182 9,395 74 Residential 119,409 1,563 107,165 1,620 98,238 1,252 Card 69,831 1,993 66,187 1,614 65,270 1,241 MUAH 83,504 1,993 71,162 2,292 82,832 2,801 Krungsri 75,370 3,899 83,165 4,995 91,577 5,274 Other — — — — 11,854 494 Total ¥ 1,484,095 ¥ 23,625 ¥ 1,262,339 ¥ 26,213 1,260,791 ¥ ¥ 22,871 Interest income on nonaccrual loans for all classes was recognized on a cash basis when ultimate collectibility of principal was certain. Otherwise, cash receipts were applied as principal reductions. Interest income on accruing impaired loans, including TDRs, was recognized on an accrual basis to the extent that the collectibility of interest income was reasonably certain based on management’s assessment. The following table shows a roll-forward of accrual TDRs and other impaired loans (including nonaccrual TDRs) for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 (in millions) Accrual TDRs: Balance at beginning of fiscal year ¥ 819,819 ¥ 670,255 ¥ 617,651 Additions (new accrual TDR status) (1) 144,368 71,033 171,740 Transfers to other impaired loans (including nonaccrual TDRs) (25,122 ) (19,053 ) (39,646 ) Loans sold (39,378 ) (26 ) (11,220 ) Principal payments and other (229,432 ) (104,558 ) (92,365 ) Balance at end of fiscal year (1) ¥ 670,255 ¥ 617,651 ¥ 646,160 Other impaired loans (including nonaccrual TDRs): Balance at beginning of fiscal year ¥ 896,031 ¥ 660,868 ¥ 592,140 Additions (new other impaired loans (including nonaccrual TDRs) status) (1)(2) 281,275 222,003 373,091 Charge-off (98,355 ) (55,309 ) (52,935 ) Transfers to accrual TDRs (43,858 ) (22,110 ) (45,310 ) Loans sold (31,581 ) (26,022 ) (29,928 ) Principal payments and other (342,644 ) (187,290 ) (176,389 ) Balance at end of fiscal year (1) ¥ 660,868 ¥ 592,140 ¥ 660,669 Notes: (1) For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. For the fiscal year ended March 31, 2020, lease receivables of ¥3,647 million and ¥465 million in the Krungsri segment, and ¥68 million and nil in the Other segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥6,946 million and ¥3,810 million in the Krungsri segment, and ¥66 million and nil in the Other segment are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2020. (2) Included in the additions of other impaired loans for the fiscal years ended March 31, 2018, 2019 and 2020 are nonaccrual TDRs as follows: ¥12,002 million, ¥13,493 million and ¥14,685 million—Card; ¥12,799 million, ¥12,738 million and ¥15,135 million—MUFG Americas Holdings; ¥12,280 million, ¥10,519 million and ¥9,828 million—Krungsri; and nil, nil and ¥1,031 million—Other, respectively. Troubled Debt Restructurings The following table summarizes the MUFG Group’s TDRs by class for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 Troubled Debt Restructurings Pre- Post- Pre- Post- Pre- Post- (in millions) Commercial (1)(3) Domestic ¥ 70,380 ¥ 69,021 ¥ 36,693 ¥ 36,693 ¥ 61,735 ¥ 61,735 Manufacturing 35,954 35,954 11,654 11,654 27,435 27,435 Construction 1,020 1,020 703 703 289 289 Real estate 1,269 1,269 948 948 2,714 2,714 Services 4,139 4,139 2,141 2,141 6,487 6,487 Wholesale and retail 16,280 14,921 19,315 19,315 20,813 20,813 Banks and other financial institutions 246 246 — — — — Communication and information services 9,643 9,643 268 268 376 376 Other industries 761 761 472 472 3,279 3,279 Consumer 1,068 1,068 1,192 1,192 342 342 Foreign 25,522 25,522 5,692 5,692 39,827 39,827 Loans acquired with deteriorated credit quality — — 50 50 10,786 10,786 Residential (1)(3) 9,763 9,763 7,379 7,379 5,137 5,137 Card (2)(3) 17,436 16,912 19,685 18,837 22,625 21,561 MUAH (2)(3) 40,578 38,224 19,837 19,837 33,782 33,564 Krungsri (2)(3) 24,015 23,929 24,392 24,330 31,238 31,209 Other (2)(3) — — — — 12,781 12,780 Total ¥ 187,694 ¥ 183,371 ¥ 113,728 ¥ 112,818 ¥ 217,911 ¥ 216,599 2018 2019 2020 Troubled Debt Restructurings Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 4,067 ¥ 11,002 ¥ 8,857 Manufacturing 839 312 3,094 Construction — 89 6 Real estate 10 — 73 Services 822 473 43 Wholesale and retail 2,231 1,713 5,421 Banks and other financial institutions — — — Communication and information services 140 8,365 9 Other industries — 50 123 Consumer 25 — 88 Foreign — — 2,337 Loans acquired with deteriorated credit quality — — — Residential (1)(3) 159 362 31 Card (2)(3) 4,191 3,442 3,320 MUAH (2)(3) 2,565 349 4,656 Krungsri (2)(3) 4,789 7,926 7,305 Other (2)(3) — — 15 Total ¥ 15,771 ¥ 23,081 ¥ 26,521 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings, Krungsri and Oth e (3) For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2020, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential, MUFG Americas Holdings and Krungsri segments and The following table summarizes outstanding recorded investment balances of TDRs by class at March 31, 2019 and 2020: 2019 2020 (in millions) Commercial (1) Domestic ¥ 445,312 ¥ 433,783 Manufacturing 311,890 313,996 Construction 4,591 3,435 Real estate 27,657 27,877 Services 17,135 17,287 Wholesale and retail 69,350 58,148 Banks and other financial institutions 135 113 Communication and information services 3,780 3,244 Other industries 6,357 6,775 Consumer 4,417 2,908 Foreign 51,701 71,898 Residential (1) 34,449 28,450 Card (2) 65,021 65,520 MUAH (2) 48,128 62,151 Krungsri (2) 62,980 76,831 Other (2) — 9,525 Total ¥ 707,591 ¥ 748,158 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings, Krungsri and Other segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2019 and 2020 are nonaccrual TDRs as follows: ¥38,838 million and ¥40,028 million—Card; ¥14,973 million and ¥19,241 million—MUFG Americas Holdings; ¥31,069 million and ¥34,659 million—Krungsri; and nil and ¥1,058 million—Other, respectively. A modification of terms of a loan under a TDR mainly involves: (i) a reduction in the stated interest rate applicable to the loan, (ii) an extension of the stated maturity date of the loan, (iii) a partial forgiveness of the principal of the loan, or (iv) a combination of all of these. Those loans are also considered impaired loans, and hence the allowance for credit losses is separately established for each loan. As a result, the amount of allowance for credit losses increases in many cases upon classification as a TDR loan. The amount of pre-modification TDRs for the Commercial and Residential segments in the above tables include accruing loans, and do not include nonaccrual loans. Once a loan is classified as a nonaccrual loan, a modification would have little likelihood of resulting in the recovery of the loan in view of the severity of the financial difficulty of the borrower. Therefore, even if a nonaccrual loan is modified, the loan continues to be classified as a nonaccrual loan. The vast majority of modifications to nonaccrual loans are temporary extensions of the maturity dates, typically for periods up to 90 days, and continually made as the borrower is unable to repay or refinance the loan at the extended maturity. Accordingly, the impact of such TDRs on the outstanding recorded investment is immaterial, and the vast majority of nonaccrual TDRs have subsequently defaulted. TDRs that subsequently defaulted in the Commercial and Residential segments in the above tables include those accruing loans that became past due one month or more within the Commercial segment and six months or more within the Residential segment, and those accruing loans reclassified to nonaccrual loans due to financial difficulties even without delinquencies. This is because classification as a nonaccrual loan is regarded as default under the MUFG Group’s credit policy. Also, the MUFG Group defines default as payment default for the purpose of the disclosure. In regards to the Card, MUFG Americas Holdings, Krungsri and Other segments, the TDRs in the above tables represent nonaccrual and accruing loans, and the defaulted loans in the above table represent nonaccruing and accruing loans that became past due one month or more within the Card segment, 60 days or more within the MUFG Americas Holdings segment, and six months or more within the Krungsri segment. Historical payment defaults are one of the factors considered when projecting future cash flows in determining the allowance for credit losses for each segment. The MUFG Group provided commitments to extend credit to customers with TDRs. The amounts of such commitments were ¥169,819 million and ¥90,097 million at March 31, 2019 and 2020, respectively. See Note 24 Credit Quality Indicator Credit quality indicators of loans by class at March 31, 2019 and 2020 are shown below: At March 31, 2019: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,391,991 ¥ 1,242,075 ¥ 217,745 ¥ 50,851,811 Manufacturing 10,819,594 279,801 47,968 11,147,363 Construction 672,152 37,236 7,857 717,245 Real estate 11,403,613 222,791 22,515 11,648,919 Services 2,436,489 174,784 19,953 2,631,226 Wholesale and retail 7,240,801 329,249 68,736 7,638,786 Banks and other financial institutions 5,199,889 7,654 898 5,208,441 Communication and information services 1,465,652 34,542 10,172 1,510,366 Other industries 8,610,464 119,581 24,947 8,754,992 Consumer 1,543,337 36,437 14,699 1,594,473 Foreign 35,418,267 562,854 112,103 36,093,224 Loans acquired with deteriorated credit quality 11,622 10,833 3,790 26,245 Total ¥ 84,821,880 ¥ 1,815,762 ¥ 333,638 ¥ 86,971,280 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,661,794 ¥ 66,290 ¥ 13,728,084 Card ¥ 516,983 ¥ 61,599 ¥ 578,582 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,752,021 ¥ ¥ ¥ ¥ ¥ Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,682,245 ¥ 199,070 ¥ 129,222 ¥ 6,010,537 At March 31, 2020: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,695,889 ¥ 1,186,044 ¥ 220,245 ¥ 51,102,178 Manufacturing 10,997,241 317,018 58,615 11,372,874 Construction 696,491 28,350 6,927 731,768 Real estate 11,790,467 190,972 20,080 12,001,519 Services 2,390,210 158,851 21,802 2,570,863 Wholesale and retail 7,124,098 301,965 71,778 7,497,841 Banks and other financial institutions 5,146,320 13,237 926 5,160,483 Communication and information services 1,530,887 32,366 8,880 1,572,133 Other industries 8,540,144 112,813 19,292 8,672,249 Consumer 1,480,031 30,472 11,945 1,522,448 Foreign 34,719,041 636,523 128,073 35,483,637 Loans acquired with deteriorated credit quality 8,255 9,739 18,978 36,972 Total ¥ 84,423,185 ¥ 1,832,306 ¥ 367,296 ¥ 86,622,787 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,256,744 ¥ 61,746 ¥ 13,318,490 Card ¥ 504,357 ¥ 61,286 ¥ 565,643 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,590,805 ¥ 15,119 ¥ 4,877,863 ¥ 87,648 ¥ 84,033 ¥ 9,655,468 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 6,513,615 ¥ 246,328 ¥ 151,647 ¥ 6,911,590 Accrual Nonaccrual Total (1) (in millions) Other ¥ 1,086,517 ¥ 31,376 ¥ 1,117,893 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥689 million and ¥365 million as of March 31, 2019 and 2020, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements. The MUFG Group classifies loans into risk categories based on relevant information about the ability of borrowers to service their debt, including, but not limited to, historical and current financial information, historical and current payment experience, credit documentation, public and non-public The primary credit quality indicator for loans within all classes of the Commercial segment is the internal credit rating assigned to each borrower based on the MUFG Group’s internal borrower ratings of 1 through 15, with the rating of 1 assigned to a borrower with the highest quality of credit. When assigning a credit rating to a borrower, the MUFG Group evaluates the borrower’s expected debt-service capability based on various information, including financial and operating information of the borrower as well as information on the industry in which the borrower operates, and the borrower’s business profile, management and compliance system. In evaluating a borrower’s debt-service capability, the MUFG Group also conducts an assessment of the level of earnings and an analysis of the borrower’s net worth. Based on the internal borrower rating, loans within the Commercial segment are categorized as Normal (internal borrower ratings of 1 through 9), Close Watch (internal borrower ratings of 10 through 12), and Likely to become Bankrupt or Legally/Virtually Bankrupt (internal borrower ratings of 13 through 15). Loans to borrowers categorized as Normal represent those that are not deemed to have collectibility issues. Loans to borrowers categorized as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. Loans to borrowers categorized as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, The accrual status is a primary credit quality indicator for loans within the Residential segment, the Card segment, the Other segment and consumer loans within the MUFG Americas Holdings segment. The accrual status of these loans is determined based on the number of delinquent payments. See Note 1 for further details of categorization of Accrual and Nonaccrual. Commercial loans within the MUFG Americas Holdings segment are categorized as either pass or criticized based on the internal credit rating assigned to each borrower. Criticized credits are those that are internally risk graded as Special Mention, Substandard or Doubtful. Special Mention credits are potentially weak, as the borrower has begun to exhibit deteriorating trends, which, if not corrected, may jeopardize repayment of the loan and result in further downgrade. Classified credits are those that are internally risk graded as Substandard or Doubtful. Substandard credits have well-defined weaknesses, which, if not corrected, could jeopardize the full satisfaction of the debt. A credit classified as Doubtful has critical weaknesses that make full collection improbable on the basis of currently existing facts and conditions. Loans within the Krungsri segment are categorized as Normal, Special Mention, Substandard, Doubtful, and Doubtful of Loss primarily based on their delinquency status. Loans categorized as Special Mention generally represent those that have the overdue principal or interest payments for a cumulative period exceeding one month commencing from the contractual due date. Loans categorized as Substandard, Doubtful or Doubtful of Loss generally represent those that have the overdue principal or interest payments for a cumulative period exceeding three months commencing from the contractual due date. For the Commercial, Residential and Card segments, credit quality indicators are based on information as of March 31. For the MUFG Americas Holdings, Krungsri and Other segments, credit quality indicators are generally based on information as of December 31. Past Due Analysis Ages of past due loans by class at March 31, 2019 and 2020 are shown below: At March 31, 2019: 1-3 Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 11,551 ¥ 30,648 ¥ 42,199 ¥ 50,809,612 ¥ 50,851,811 ¥ 6,900 Manufacturing 1,597 3,036 4,633 11,142,730 11,147,363 — Construction 218 60 278 716,967 717,245 1 Real estate 2,034 4,256 6,290 11,642,629 11,648,919 2,524 Services 778 569 1,347 2,629,879 2,631,226 1 Wholesale and retail 2,791 2,390 5,181 7,633,605 7,638,786 62 Banks and other financial institutions — 21 21 5,208,420 5,208,441 — Communication and information services 411 758 1,169 1,509,197 1,510,366 — Other industries 365 13,037 13,402 8,741,590 8,754,992 — Consumer 3,357 6,521 9,878 1,584,595 1,594,473 4,312 Foreign 10,881 19,993 30,874 36,062,350 36,093,224 236 Residential 62,686 16,615 79,301 13,641,449 13,720,750 6,584 Card 17,203 30,568 47,771 527,421 575,192 — MUAH 28,696 10,827 39,523 9,557,501 9,597,024 2,287 Krungsri 126,313 106,777 233,090 5,771,541 6,004,631 — Total ¥ 257,330 ¥ 215,428 ¥ 472,758 ¥ 116,369,874 ¥ 116,842,632 ¥ 16,007 At March 31, 2020: 1-3 Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 9,215 ¥ 26,971 ¥ 36,186 ¥ 51,065,992 ¥ 51,102,178 ¥ 4,720 Manufacturing 820 2,762 3,582 11,369,292 11,372,874 620 Construction 143 100 243 731,525 731,768 — Real estate 880 3,300 4,180 11,997,339 12,001,519 1,181 Services 812 908 1,720 2,569,143 2,570,863 5 Wholesale and retail 2,598 2,603 5,201 7,492,640 7,497,841 19 Banks and other financial institutions — 54 54 5,160,429 5,160,483 — Communication and information services 336 57 393 1,571,740 1,572,133 — Other industries 171 12,889 13,060 8,659,189 8,672,249 97 Consumer 3,455 4,298 7,753 1,514,695 1,522,448 2,798 Foreign 9,927 23,548 33,475 35,450,162 35,483,637 164 Residential 48,404 15,443 63,847 13,248,278 13,312,125 6,288 Card 14,735 29,997 44,732 518,008 562,740 — MUAH 31,052 14,435 45,487 9,603,339 9,648,826 2,101 Krungsri 160,253 129,186 289,439 6,616,104 6,905,543 — Other 16,442 24,348 40,790 1,069,186 1,109,976 — Total ¥ 290,028 ¥ 263,928 ¥ 553,956 ¥ 117,571,069 ¥ 118,125,025 ¥ 13,273 Note: (1) Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. Allowance for Credit Losses Changes in the allowance for credit losses by portfolio years Fiscal year ended March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Provision for (reversal of) credit losses (297,401 ) (22,291 ) 23,422 (9,309 ) 64,732 (240,847 ) Charge-offs 134,807 3,838 22,696 14,701 56,067 232,109 Recoveries 24,913 1,339 1,228 6,140 17,490 51,110 Net charge-offs 109,894 2,499 21,468 8,561 38,577 180,999 Other (1) (2,293 ) — — (2,098 ) 8,173 3,782 Balance at end of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Fiscal year ended March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Provision for (reversal of) credit losses (43,850 ) (4,480 ) 23,809 9,277 49,574 34,330 Charge-offs 76,664 274 24,310 13,224 59,569 174,041 Recoveries 17,565 834 932 3,733 21,053 44,117 Net charge-offs 59,099 (560 ) 23,378 9,491 38,516 129,924 Other (1) 1,466 — — (970 ) (10,842 ) (10,346 ) Balance at end of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Fiscal year ended March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ — ¥ 658,184 Provision for (reversal of) credit losses 153,782 (1,028 ) 26,542 30,825 70,023 41,569 321,713 Charge-offs 85,326 3,227 25,149 27,934 77,907 23,592 243,135 Recoveries 26,427 375 1,237 4,173 23,170 8,476 63,858 Net charge-offs 58,899 2,852 23,912 23,761 54,737 15,116 179,277 Other (1) (2,223 ) — — (650 ) 9,528 2,265 8,920 Balance at end of fiscal year ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Note: (1) Other is Allowance for credit losses and recorded investment in loans by portfolio segment at March 31, 2019 and 2020 are shown below: At March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 312,970 ¥ 14,175 ¥ 21,829 ¥ 8,294 ¥ 28,254 ¥ 385,522 Collectively evaluated for impairment 63,366 23,413 10,708 44,282 116,529 258,298 Loans acquired with deteriorated credit quality (2) 13,279 1,038 13 5 29 14,364 Total ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Loans: Individually evaluated for impairment ¥ 879,944 ¥ 102,948 ¥ 64,752 ¥ 69,760 ¥ 83,259 ¥ 1,200,663 Collectively evaluated for impairment 86,065,091 13,617,802 510,440 9,527,264 5,921,372 115,641,969 Loans acquired with deteriorated credit quality (2) 26,245 7,334 3,390 11,228 5,906 54,103 Total (1) ¥ 86,971,280 ¥ 13,728,084 ¥ 578,582 ¥ 9,608,252 ¥ 6,010,537 ¥ 116,896,735 At March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 364,079 ¥ 12,651 ¥ 19,799 ¥ 5,977 ¥ 30,198 ¥ 5,073 ¥ 437,777 Collectively evaluated for impairment 108,100 21,130 15,369 53,013 139,401 22,566 359,579 Loans acquired with deteriorated credit quality (2) 10,096 965 12 5 27 1,079 12,184 Total ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Loans: Individually evaluated for impairment ¥ 944,988 ¥ 92,448 ¥ 65,292 ¥ 67,719 ¥ 98,959 ¥ 17,512 ¥ 1,286,918 Collectively evaluated for impairment 85,640,827 13,219,677 497,448 9,581,107 6,806,584 1,092,464 116,838,107 Loans acquired with deteriorated credit quality (2) 36,972 6,365 2,903 7,007 6,047 7,917 67,211 Total (1) ¥ 86,622,787 ¥ 13,318,490 ¥ 565,643 ¥ 9,655,833 ¥ 6,911,590 ¥ 1,117,893 ¥ 118,192,236 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment. Nonperforming loans were actively disposed of by sales during recent years. The allocated allowance for credit losses for such loans was removed from the allowance for credit losses and transferred to the valuation allowance for loans held for sale upon a decision to sell. Net charge-offs in the above table include a decrease from charge-offs in the allowance for credit losses amounting to ¥12.2 billion and ¥19.4 billion for the fiscal years ended March 31, 2018 and 2020, respectively, and an increase from recoveries in the allowance for credit losses amounting to ¥15.1 billion for the fiscal year ended March 31, 2019 due to loan disposal activity. The MUFG Group sol

Premises and Equipment _Text Bl

Premises and Equipment [Text Block]	12 Months Ended
Premises and Equipment [Text Block]	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Premises and Equipment [Text Block]	5. PREMISES AND EQUIPMENT Premises and equipment at March 31, 2019 and 2020 consisted of the following: 2019 2020 (in millions) Land ¥ 362,742 ¥ 380,477 Buildings 829,606 782,367 Equipment and furniture 648,598 623,676 Leasehold improvements 305,281 310,957 Construction in progress 34,002 35,594 Total 2,180,229 2,133,071 Less accumulated depreciation 1,206,629 1,203,542 Premises and equipment-net ¥ 973,600 ¥ 929,529 For the fiscal years ended March 31, 2018, 2019 and 2020, the MUFG Group recognized ¥39,358 million, ¥31,345 million and ¥16,575 million, respectively, of impairment losses for long-lived assets, primarily real estate which was either formerly used for its banking operations and is no longer used or real estate that is being used where recovery of the carrying amount is doubtful. In addition, ¥213 million, ¥411 million and ¥194 non-interest Impairment losses for the fiscal year ended March 31, 2018 included ¥34,016 million of losses o n Re-Imagining Impairment losses for the fiscal year ended March 31, 2019 included ¥21,096 million losses on long-lived assets, including land, buildings, and equipment and furniture, which were held by certain consumer finance subsidiary. See Note 6 for the details of these impairments.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets [Text Block]	12 Months Ended
Goodwill and Other Intangible Assets [Text Block]	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets [Text Block]	6. GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill The table below presents the movement in the carrying amount of goodwill by business segment during the fiscal years ended March 31, 2019 and 2020: Global Global Asset Global Total (in millions) Balance at March 31, 2018: Goodwill (2)(3) ¥ 107,237 ¥ 496,191 ¥ 27,724 ¥ 2,300 ¥ 633,452 Accumulated impairment losses (2) — (177,750 ) (14,368 ) — (192,118 ) 107,237 318,441 13,356 2,300 441,334 Foreign currency translation adjustments and other (1,898 ) (5,308 ) (237 ) — (7,443 ) Balance at March 31, 2019: Goodwill 105,339 490,883 27,487 2,300 626,009 Accumulated impairment losses — (177,750 ) (14,368 ) — (192,118 ) 105,339 313,133 13,119 2,300 433,891 Goodwill acquired during the fiscal year (1) 34,553 260,639 178,308 — 473,500 Impairment loss (32,868 ) (350,942 ) — — (383,810 ) Foreign currency translation adjustments and other (1,354 ) (12,877 ) 8,276 — (5,955 ) Balance at March 31, 2020: Goodwill 138,538 738,645 214,071 2,300 1,093,554 Accumulated impairment losses (32,868 ) (528,692 ) (14,368 ) — (575,928 ) ¥ 105,670 ¥ 209,953 ¥ 199,703 ¥ 2,300 ¥ 517,626 Notes: (1) See Note 2 for the goodwill acquired in connection with acquisitions. (2) Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group. (3) The balance as of March, 31 2018 reflected the organization change in 2018 appropriately and was erroneously disclosed. Such amount has been restated from the amount previously reported as follows: Global Corporate & Investment Banking Business Group Global Commercial Banking Business Group As previously reported As restated As previously reported As restated (in millions) Balance at March 31, 2018: Goodwill ¥ — ¥ 107,237 ¥ 603,428 ¥ 496,191 Foreign currency translation adjustments and other — (1,898 ) (7,206 ) (5,308 ) Balance at March 31, 2019: Goodwill — 105,339 596,222 490,883 U.S. GAAP requires to test goodwill for impairment at least annually, or more frequently if events or changes in circumstances indicate that goodwill may be impaired, using a process that compares the carrying amount of a reporting unit with its fair value. An impairment loss is recognized to the extent that the carrying amount of a reporting unit exceeds its fair value, but not exceeding the total amount of goodwill allocated to that reporting unit. For the fiscal years ended March 31, 2018 and 2019, there were no impairment losses recognized. For the fiscal year ended March 31, 2020, the MUFG Group recognized ¥241,356 million of an impairment of goodwill relating to Danamon reporting unit within the Global Commercial Banking Business Group Segment, which is included in impairment of goodwill in the accompanying consolidated statements of income. In determining the acquisition price of Bank Danamon, the results of multiple valuation techniques were considered with an expectation to benefit from Danamon’s foothold in the developing local retail and SME segments to deepen its banking franchise in Indonesia. After the acquisition of Danamon by MUFG Bank, Danamon’s market capitalization decreased. As a result, the fair value of the reporting unit as an exit price was measured on June 30, 2019 for the quantitative goodwill impairment test, and led to impairment of goodwill as the fair value had fallen below the carrying amount of the reporting unit, including goodwill, reflecting a reduction in stock price as well as changes in the inputs to the valuation techniques in comparison to those considered in determining the acquisition price such as discount rate. The measurement of the fair value of the reporting unit was primarily based on a market approach, and was also corroborated by multiple valuation techniques. For the fiscal year ended March 31, 2020, the MUFG Group recognized ¥62,157 million of impairment of goodwill relating to Krungsri reporting unit within the Global Commercial Banking Business Group segment. The global economic slowdown led to slowing economic growth in Thailand and the decline of Krungsri’s stock price. As a result, the fair value of the reporting unit was measured on December 31, 2019 for the quantitative goodwill impairment test, and led to impairment of goodwill as the fair value had fallen below the carrying amount of the reporting unit. The measurement of the fair value of the reporting unit was primarily based on a market approach, and was also corroborated by multiple valuation techniques. For the fiscal year ended March 31, 2020, the MUFG Group recognized ¥80,297 million in impairment of goodwill relating to MUAH reporting unit within the Global Commercial Banking Business Group segment and Global Corporate & Investment Banking Business Group segment. Due to the decline in interest rates and slower growth than previously forecasted, cash flow projections for reporting units were lowe red impairment test, and led to impairment of goodwill with the fair value fallen below the carrying amount of the reporting unit. The MUFG Group estimated the fair value of its reporting units using a combination of the income and the market approaches. The income approach estimates the fair value of the reporting units by discounting management’s projections of each reporting unit’s cash flows, including a terminal value to estimate the fair value of cash flows beyond the final year of projected results, using a discount rate derived from the Capital Asset Pricing Model. The market approach incorporates comparable public company price to tangible book value and price to earnings multiples. The MUFG Group consolidates certain subsidiaries, including MUAH, based on financial information for the year ended December 31 as this date and MUFG’s fiscal year which ends on March 31 have been treated as coterminous. For the fiscal year ended March 31, 2020, the effect of recording a goodwill impairment intervening event due to economic environment triggered by COVID-19 for the three-month period ended March 31 2020 on MUFG’s GCB segment related to MUAH would have been approximately ¥80 - ¥ 110 billion and would have resulted in a decrease of ¥80 - ¥110 billion to net income attributable to Mitsubishi UFJ Financial Group. This intervening event occurring during the three-month period ended March 31, 2020, if recorded, would not have had a substantial and permanent effects on consolidated total assets, net income or total equity as of March 31, 2020, and therefore, the intervening event was not recognized for the fiscal year ended March 31, 2020. Other Intangible Assets The table below presents the gross carrying amount, accumulated amortization and net carrying amount, in total and by major class of other intangible assets at March 31, 2019 and 2020: 2019 2020 Gross Accumulated Net Gross Accumulated Net (in millions) Intangible assets subject to amortization: Software ¥ 2,703,413 ¥ 2,029,775 ¥ 673,638 ¥ 2,852,273 ¥ 2,096,635 ¥ 755,638 Customer relationships 387,936 246,526 141,410 567,886 264,636 303,250 Core deposit intangibles 126,796 88,643 38,153 174,802 100,022 74,780 Trade names 77,204 34,283 42,921 94,748 38,055 56,693 Other 9,601 4,220 5,381 17,374 5,769 11,605 Total ¥ 3,304,950 ¥ 2,403,447 901,503 ¥ 3,707,083 ¥ 2,505,117 1,201,966 Intangible assets not subject to amortization: Other (1) 25,693 37,560 Total ¥ 927,196 ¥ 1,239,526 Note: (1) Intangible assets not subject to amortization includes ¥17,431 million and ¥29,641 million of mortgage servicing rights accounted for at fair value at March 31, 2019 and 2020, respectively. Intangible assets subject to amortization acquired during the fiscal year ended March 31, 2019 amounted to ¥262,700 million, which primarily consisted of ¥262,408 million of software. The weighted average amortization periods for these assets are 6 years. There is no significant residual value estimated for these assets. Intangible assets not subject to amortization acquired during the fiscal year ended March 31, 2019 amounted to ¥11,172 million. Intangible assets subject to amortization acquired during the fiscal year ended March 31, 2020 amounted to ¥538,925 million, which primarily consisted of ¥291,821 million of software, ¥44,140 million of core deposit intangibles, ¥180,414 million of customer relationships and ¥16,402 million of trade names. The weighted average amortization periods for these assets are 5 years, 10 years, 17 years and 23 years, respectively. There is no significant residual value estimated for these assets. Intangible assets not subject to amortization acquired during the fiscal year ended March 31, 2020 amounted to ¥23,804 million. For the fiscal years ended March 31, 2018, 2019 and 2020, the MUFG Group recognized ¥21,900 million, ¥118,108 million and ¥3,732 million, respectively, of impairment losses for intangible assets whose carrying amounts exceeded their fair value. In computing the amount of impairment losses, fair value was determined primarily based on the present value of expected future cash flows, the estimated value based on appraisals, or market prices. The impairment loss for the fiscal year ended March 31, 2018 included a loss of ¥11,121 million relating to the foreign subsidiary’s customer relationships under the Trust Asset Business Group segment. The intangible assets were valued based on discounted expected future cash flows. The estimated future cash flows of the above customer were revised downward due to a decrease in acquired customer base. Accordingly, the MUFG group revaluated the intangible assets and recognized impairment losses . The impairment loss for the fiscal year ended March 31, 2019 included a loss of ¥137,186 million relating to software held by certain consumer finance subsidiary under the Retail & Commercial Banking Business Group segment. The consumer finance subsidiary determined to fundamentally review its current system integration plan, comprehensively taking into account the scale, complexity and the degree of difficulty for the system development to respond rapid changes in payments market in an appropriate manner, at the meeting of the Board of Directors on March 25, 2019. The consumer finance subsidiary considered software under development unlikely to have cost reduction effect and remain in use in the future, and reevaluated the profitability of existing software in relation to its system integration plan. As a result, it was determined that carrying amounts of both system software under development and long lived assets group of credit business, including existing system software, land, buildings, and equipment and furniture exceeded their fair values, and ¥87,596 million and ¥28,494 million of impairment losses were recognized on system software under development and existing software, respectively. In computing the amount of impairment losses, the fair value was primarily estimated using an income approach. The income approach is based on the present value of expected cash flows, which represents market participant perspective. In addition to the impairments on software, ¥21,096 million of impairment losses on long-lived assets, including land, buildings, and equipment and furniture, were recognized. The estimated aggregate amortization expense for intangible assets for the next five fiscal years is as follows: (in millions) Fiscal year ending March 31: 2021 ¥ 263,056 2022 228,137 2023 188,358 2024 150,702 2025 108,504

Lease Transactions _Text Block_

Lease Transactions [Text Block]	12 Months Ended
Lease Transactions [Text Block]	Mar. 31, 2020
Leases [Abstract]
Lease Transactions [Text Block]	7. LEASE TRANSACTIONS Lease transaction as a lessee Right-of-use Premises and equipment Long-term debt Right-of-use Other assets Other liabilities The discount rates used in determining the present value of leases are the MUFG Group’s incremental borrowing rate, developed based upon each lease’s term and currency of payment. The lease term includes options to extend or terminate the lease when it is reasonably certain that the MUFG Group will exercise that option. The MUFG Group ha s operating lease right-of-use The following table presents profit or loss of lease transactions as a lessee for the fiscal year ended March 31, 2020: 2020 (in millions) Finance lease cost: Amortization of right-of-use ¥ 5,455 Interest on lease liabilities 460 Operating lease cost 99,939 The following table presents information of lease transactions as a lessee for the fiscal year ended March 31, 2020: 2020 (in millions) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases ¥ 482 Operating cash flows from operating leases 106,103 Financing cash flows from finance leases 7,090 Right-of-use 12,754 Right-of-use 46,482 Weighted-average remaining lease term: Finance leases 4.4 years Operating leases 9.5 years Weighted-average discount rate: Finance leases 0.99 % Operating leases 1.16 % Maturities of lease liabilities as of March 31, 2020 are as follows: Finance Operating (in millions) 2021 ¥ 7,835 ¥ 107,270 2022 6,794 80,460 2023 4,755 57,057 2024 3,073 40,902 2025 1,304 35,827 2026 and thereafter 2,655 195,540 Total undiscounted cash flows 26,416 517,056 Difference between undiscounted and discounted cash flows (1,230 ) (34,243 ) Amount on balance sheet ¥ 25,186 ¥ 482,813 Lease transactions as a lessor As part of its financing activities, the MUFG Group enters into leasing arrangements The following table presents profit or loss of lease transactions as a lessor for the fiscal year ended March 31, 2020: 2020 (in millions) Direct f Finance income on net investment ¥ 119,010 Operating leases: Lease income 7,856 Total ¥ 126,866 Finance income on net investment is included in Interest income—Loans, including fees in the consolidated statements of income. Lease income from operating lease transactions is included in Other non-interest The following table presents the components of direct financing lease transactions as of March 31, 2020. 2020 (in millions) Lease receivables (undiscounted) ¥ 2,193,360 Adjustments: Discounted unguaranteed residual value 15,515 Initial direct cost on direct financing leases 29,562 Deferred selling profit (364,206 ) Net investment in direct financing leases ¥ 1,874,231 The following table presents maturity of the lease payment receivables of direct financing lease transactions as of March 31, 2020: Lease (in millions) 2021 ¥ 567,342 2022 485,810 2023 382,135 2024 295,263 2025 207,067 2026 and thereafter 255,743 Total undiscounted cash flows 2,193,360 Difference between undiscounted cash flows and the lease receivables recognized on balance sheet (319,129 ) Amount on balance sheet ¥ 1,874,231

Income Taxes _Text Block_

Income Taxes [Text Block]	12 Months Ended
Income Taxes [Text Block]	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes [Text Block]	8. INCOME TAXES Income before Income Tax Expense Income before income tax expense by jurisdiction for the fiscal years ended March 31, 2018, 2019 and 2020 was as follows: 2018 2019 2020 (in millions) Domestic income ¥ 803,057 ¥ 228,018 ¥ 89,440 Foreign income 858,762 642,824 343,780 Total ¥ 1,661,819 ¥ 870,842 ¥ 433,220 Income Tax Expense (Benefit) The detail of current and deferred income tax expense (benefit) for the fiscal years ended March 31, 2018, 2019 and 2020 was as follows: 2018 2019 2020 (in millions) Current: Domestic ¥ 180,109 ¥ 57,303 ¥ 28,128 Foreign 107,119 123,730 147,344 Total 287,228 181,033 175,472 Deferred: Domestic 116,873 (32,746 ) (18,949 ) Foreign 3,722 (15,050 ) (42,018 ) Total 120,595 (47,796 ) (60,967 ) Income tax expense 407,823 133,237 114,505 Income tax expense (benefit) reported in Accumulated OCI relating to: Investment securities 120,588 15,590 (29,747 ) Debt valuation adjustments (960 ) 4,293 23,908 Derivatives qualifying for cash flow hedges (4,421 ) (1,845 ) 4,012 Defined benefit plans 50,774 (38,229 ) (57,685 ) Foreign currency translation adjustments (34,527 ) 15,148 (20,693 ) Total 131,454 (5,043 ) (80,205 ) Total ¥ 539,277 ¥ 128,194 ¥ 34,300 The MUFG Group files tax returns on a consolidated basis for corporate income taxes within Japan. A consolidated basis for corporate income taxes results in the reporting of taxable income or loss based upon the combined profits or losses of the parent company and its wholly-owned domestic subsidiaries. In the United States of America, on December 22, 2017, the Tax Cuts & Jobs Act was signed into law reducing the federal corporate income tax rate from 35% to 21% effective January 1, 2018. As a result of the reduction in the corporate income tax rate, the MUFG Group revalued its net deferred tax liabilities at March 31, 2018, resulting in a one-time Reconciliation of Effective Income Tax Rate Income taxes in Japan applicable to the MUFG Group are imposed by the national, prefectural and municipal governments, and in the aggregate resulted in a normal effective statutory rate of approximately 30.6%, 30.6%, and 30.6% for the fiscal years ended March 31, 2018, 2019 and 2020, respectively. Foreign subsidiaries are subject to income taxes of the countries in which they operate. A reconciliation of the effective income tax rates reflected in the accompanying consolidated statements of income to the combined normal effective statutory tax rates for the fiscal years ended March 31, 2018, 2019 and 2020 is as follows: 2018 2019 Combined normal effective statutory tax rate 30.6 % 30.6 % 30.6 % Nondeductible expenses 0.2 0.5 1.2 Impairment of goodwill — — 26.1 Foreign tax credit and payments (1.7 ) (3.3 ) (9.2 ) Lower tax rates applicable to income of subsidiaries (0.4 ) (2.5 ) (3.2 ) Change in valuation allowance (3.0 ) (1.4 ) 7.9 Realization of previously unrecognized tax effects of subsidiaries — — (19.8 ) (1) Nontaxable dividends received (2.0 ) (9.1 ) (15.6 ) Undistributed earnings of subsidiaries 0.7 0.6 3.6 Tax and interest expense for uncertainty in income taxes 0.0 0.6 0.0 Noncontrolling interest income (loss) 0.1 0.2 (0.1 ) Effect of changes in tax laws (0.6 ) 0.0 — Expiration of loss carryforward 0.4 0.1 1.9 Other—net 0.2 (1.0 ) 3.0 Effective income tax rate 24.5 % 15.3 % 26.4 % Note: (1) In October 2019, a wholly owned subsidiary of the MUFG Group was sold. The sale resulted in the realization of tax benefits that were not previously recognized as deferred tax assets, resulting in a ¥85,588 million reduction of income tax expense and a 19.8% reduction in the effective tax rate for the fiscal year ended March 31, 2020. Deferred Tax Assets and Liabilities Deferred tax assets and liabilities are computed for each tax jurisdiction using currently enacted tax rates applicable to periods when the temporary differences are expected to reverse. The tax effects of the items comprising the MUFG Group’s net deferred tax assets at March 31, 2019 and 2020 were as follows: 2019 2020 (in millions) Deferred tax assets: Allowance for credit losses ¥ 301,222 ¥ 317,770 Operating loss carryforwards 177,143 94,326 Loans 691 2,022 Accrued liabilities and other 236,363 277,807 Premises and equipment, including sale-and-leaseback 158,144 150,116 Derivative financial instruments 101,118 96,761 Defined benefit plans 5,238 57,836 Obligations under operating leases — 133,812 Valuation allowance (218,191 ) (151,530 ) Total deferred tax assets 761,728 978,920 Deferred tax liabilities: Investment securities (including trading account assets at fair value under the fair value 911,483 788,614 Intangible assets 38,772 87,063 Lease transactions 65,115 54,349 Investments in subsidiaries and affiliates (1) 217,429 279,583 Right-of-use assets of operating leases — 106,995 Other (1) 63,272 90,653 Total deferred tax liabilities 1,296,071 1,407,257 Net deferred tax assets (liabilities) ¥ (534,343 ) ¥ (428,337 ) Note: (1) Certain reclassifications have been made to prior period The valuation allowance was provided primarily against deferred tax assets recorded at MUFG and its subsidiaries with operating loss carryforwards. The valuation allowance is determined to reduce the measurement of deferred tax assets not expected to be realized. Management considers all available evidence, both positive and negative, to determine whether the valuation allowance is necessary based on the weight of that evidence. Management determines the amount of the valuation allowance based on future reversals of existing taxable temporary differences and future taxable income exclusive of reversing temporary differences. Future taxable income is developed from forecasted operating results, based on recent historical trends and approved business plans, the eligible carryforward periods and other relevant factors. For certain subsidiaries where strong negative evidence exists, such as the existence of significant amounts of operating loss carryforwards, cumulative losses and the expiration of unused operating loss carryforwards in recent years, a valuation allowance was recognized against the deferred tax assets as of March 31, 2019 and 2020 to the extent that it is more likely than not that they will not be realized. For the fiscal year ended March 31, 2018, the MUFG Group released a valuation allowance of ¥53,360 million which was mainly due to the commencement of a certain subsidiary’s application of the consolidated corporate-tax corporate-tax Furthermore, under the Japanese tax law, 95% of a dividend received from six months or more ending on the date on which the dividend is declared can be excluded from the domestic company’s taxable income. Therefore, if undistributed earnings of certain foreign subsidiaries are repatriated through dividends, only % of the amount of dividends will be included in income. Operating Loss and Tax Credit Carryforwards At March 31, 2020, the MUFG Group had operating loss carryforwards for corporate tax of ¥228,637 million and tax credit carryforwards of ¥72,360 million for tax purposes. Such carryforwards, if not utilized, are scheduled to expire as follows: Operating loss Tax credit (in millions) Fiscal year ending March 31: 2021 ¥ 11,024 ¥ 12,534 2022 16,306 6,137 2023 5,867 219 2024 5,524 185 2025 81,967 168 2026 51,271 130 2027 and thereafter 25,770 47,943 No definite expiration date 30,908 5,044 Total ¥ 228,637 ¥ 72,360 Uncertainty in Income Tax The following is a roll-forward of the MUFG Group’s unrecognized tax benefits for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 (in millions) Balance at beginning of fiscal year ¥ 7,851 ¥ 12,917 ¥ 19,160 Gross amount of increases for current year’s tax positions 427 313 399 Gross amount of increases for prior years’ tax positions 6,642 8,836 212 Gross amount of decreases for prior years’ tax positions (455 ) (1,090 ) — Net amount of changes relating to settlements with tax authorities (1,074 ) — (81 ) Decreases due to lapse of applicable statutes of limitations (253 ) (1,540 ) (297 ) Foreign exchange translation and other (221 ) (276 ) (144 ) Balance at end of fiscal year ¥ 12,917 ¥ 19,160 ¥ 19,249 The MUFG Group classifies interest and penalties, if applicable, related to income taxes as Income tax expense. Accrued interest and penalties (not included in the “unrecognized tax benefits” above) are a component of Other liabilities. The following is a roll-forward of the interest and penalties recognized in the accompanying consolidated financial statements for 2018 2019 2020 (in millions) Balance at beginning of fiscal year ¥ 4,054 ¥ 4,564 ¥ 3,056 Total interest and penalties in the consolidated statements of income 694 (1,655 ) (398 ) Total cash settlements, foreign exchange translation and other (184 ) 147 (46 ) Balance at end of fiscal year ¥ 4,564 ¥ 3,056 ¥ 2,612 The MUFG Group is subject to ongoing tax examinations by the tax authorities of the various jurisdictions in which it operates. The following are the major tax jurisdictions in which the MUFG Group operates and the status of years under audit or open to examination: Jurisdiction Tax years Japan 2019 and forward United States—Federal 2016 and forward United States—California 2015 and forward Thailand 2012 and forward Indonesia 2017 and forward The MUFG Group is currently under continuous examinations by the tax authorities in various domestic and foreign jurisdictions and many of these examinations are resolved every year. The unrecognized tax benefits will decrease since resolved items will be removed from the balance regardless of whether their resolution results in payment or recognition. It is reasonably possible that the unrecognized tax benefits will decrease by approximately ¥2.4 billion during the next twelve months.

Pledged Assets and Collateral _

Pledged Assets and Collateral [Text Block]	12 Months Ended
Pledged Assets and Collateral [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Pledged Assets and Collateral [Text Block]	9. PLEDGED ASSETS AND COLLATERAL Pledged Assets At March 31, 2020, assets mortgaged, pledged, or otherwise subject to lien were as follows: 2020 (in millions) Trading account securities ¥ 10,264,854 Investment securities 14,096,841 Loans 13,354,396 Other 34,590 Total ¥ 37,750,681 The above pledged assets were classified by type of liabilities to which they related as follows: 2020 (in millions) Deposits ¥ 134,704 Payables under repurchase agreements and securities lending transactions 15,286,574 Other short-term borrowings and long-term debt 22,312,888 Other 16,515 Total ¥ 37,750,681 At March 31, 2020, certain investment securities, principally Japanese national government and Japanese government agency bonds, loans, and other assets with a combined carrying value of ¥18,254,788 million were pledged for acting as a collection agent of public funds, for settlement of exchange at the Bank of Japan and Japanese Banks’ Payment Clearing Network, for derivative transactions and for certain other purposes. The MUFG Group engages in on-balance Under Japanese law, Japanese banks are required to maintain certain reserves on deposit with the Bank of Japan based on the amount of deposit balances and certain other factors. There are similar reserve deposit requirements for foreign offices and subsidiaries engaged in banking businesses in foreign countries. At March 31, 2019 and 2020 the reserve funds required to be maintained by the MUFG Group, which are included in Cash and due from banks and Interest-earning deposits in other banks, were ¥2,568,340 million and ¥2,606,464 million, respectively. Collateral The MUFG Group accepts and provides financial assets as collateral for transactions, principally commercial loans, repurchase agreements and securities lending transactions, call money, and derivatives. Financial assets eligible for such collateral include, among others, marketable equity securities, trade and notes receivable and CDs. Secured parties, including creditors and counterparties to certain transactions with the MUFG Group, may sell or repledge financial assets provided as collateral. Certain contracts, however, may not be specific about the secured party’s right to sell or repledge collateral under the applicable statutes and, therefore, whether or not the secured party is permitted to sell or repledge collateral would differ depending on the interpretations of specific provisions of the existing statutes, contract or certain market practices. If the MUFG Group determines, based on available information, that a financial asset provided as collateral might not be sold or repledged by the secured parties, such collateral is not separately reported in the accompanying consolidated balance sheets. If a secured party is permitted to sell or repledge financial assets provided as collateral by contract or custom under the existing statutes, the MUFG Group reports such pledged financial assets separately on the face of the accompanying consolidated balance sheets. At March 31, 2020, the MUFG Group pledged ¥36,223 billion of assets that may not be sold or repledged by the secured parties. Certain banking subsidiaries accept collateral for commercial loans and certain banking transactions under a standardized agreement with customers, which provides that these banking subsidiaries may require the customers to provide collateral or guarantees with respect to the loans and other banking transactions. Financial assets pledged as collateral are generally negotiable and transferable instruments, and such negotiability and transferability are authorized by applicable legislation. In principle, Japanese legislation permits these banking subsidiaries to repledge financial assets accepted as collateral unless otherwise prohibited by contract or relevant statutes. Nevertheless, the MUFG Group did not sell or repledge nor does it plan to sell or repledge such collateral accepted in connection with commercial loans before a debtor’s default or other credit events specified in the agreements as it is not customary within the banking industry in Japan to dispose of collateral before a debtor’s default and other specified credit events. Derivative agreements commonly used in the marketplace do not prohibit a secured party’s disposition of financial assets received as collateral, and in resale agreements and securities borrowing transactions, securities accepted as collateral may be sold or repledged by the secured parties. At March 31, 2019 and 2020, the fair value of the collateral accepted by the MUFG Group that is permitted to be sold or repledged was ¥22,927 billion and ¥38,858 billion, respectively, of which ¥16,514 billion and ¥32,095 billion, respectively, was sold or repledged. At March 31, 2019 and 2020, the cash collateral pledged for derivative transactions, which is included in Other assets, was ¥1,276,897 million and ¥1,696,108 million, respectively, and the cash collateral received for derivative transactions, which is included in Other liabilities, was ¥844,234 million and ¥1,125,305 million, respectively.

Deposits _Text Block_

Deposits [Text Block]	12 Months Ended
Deposits [Text Block]	Mar. 31, 2020
Banking and Thrift [Abstract]
Deposits [Text Block]	10. DEPOSITS The balances of time deposits, including CDs, issued in amounts of ¥10 million (approximately U.S.$93 thousand at the Federal Reserve Bank of New York’s noon buying rate on March 31, 2020) or more with respect to domestic deposits and issued in amounts of U.S.$100,000 or more with respect to foreign deposits were ¥25,899,780 million and ¥23,858,381 million, respectively, at March 31, 2019, and ¥23,957,076 million and ¥23,329,855 million, respectively, at March 31, 2020. The maturity information at March 31, 2020 for domestic and foreign time deposits, including CDs, is summarized as follows: Domestic Foreign (in millions) Due in one year or less ¥ 31,655,230 ¥ 23,574,644 Due after one year through two years 4,522,580 722,461 Due after two years through three years 2,430,995 275,303 Due after three years through four years 546,578 112,962 Due after four years through five years 654,135 17,950 Due after five years 799,180 32,726 Total ¥ 40,608,698 ¥ 24,736,046

Call Money and Funds Purchased

Call Money and Funds Purchased [Text Block]	12 Months Ended
Call Money and Funds Purchased [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Call Money and Funds Purchased [Text Block]	11. CALL MONEY AND FUNDS PURCHASED A summary of funds transactions for the fiscal years ended March 31, 2019 and 2020 is as follows: 2019 2020 (in millions, except percentages and days) Outstanding at end of fiscal year: Amount ¥ 2,450,320 ¥ 3,668,922 Principal range of maturities 1 day to 30 days 1 Weighted average interest rate 0.12 % 0.04 %

Due to Trust Account, Short-ter

Due to Trust Account, Short-term Borrowings and Long-term Debt [Text Block]	12 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Due to Trust Account, Short-term Borrowings and Long-term Debt [Text Block]	12. DUE TO TRUST ACCOUNT, SHORT-TERM BORROWINGS AND LONG-TERM DEBT Mitsubishi UFJ Trust and Banking holds assets on behalf of its customers in an agent, fiduciary or trust capacity. Such trust account assets are not the MUFG Group’s proprietary assets and are managed and accounted for separately. However, excess cash funds of individual trust accounts are often placed with Mitsubishi UFJ Trust and Banking which manages the funds together with its own funds in its proprietary account. Due to trust account reflects a temporary placement of the excess funds from individual trust accounts and, in view of the MUFG Group’s funding, due to trust account is similar to short-term funding, including demand deposits and other overnight funds purchased. The balance changes in response to the day-to-day 2019 2020 (in millions, except percentages) Amount outstanding at end of fiscal year ¥ 2,735,952 ¥ 3,377,747 Weighted average interest rate on outstanding balance at end of fiscal year 0.00 % 0.00 % At March 31, 2019 and 2020, the MUFG Group had unused lines of credit for financing amounting to ¥5,525,069 million and ¥7,519,582 million, respectively. The amounts principally consist of pooled collateral which are used to cover shortages in the Bank of Japan account and to meet liquidity needs. The MUFG Group may borrow Other short-term borrowings at March 31, 2019 and 2020 were comprised of the following: 2019 2020 (in millions, except percentages) Domestic offices: Commercial paper ¥ 1,033,568 ¥ 1,160,758 Borrowings from the Bank of Japan 241,070 9,800,800 Borrowings from other financial institutions 227,482 191,453 Other 122,166 170,044 Total domestic offices 1,624,286 11,323,055 Foreign offices: Commercial paper 3,929,636 3,836,459 Borrowings from other financial institutions 967,901 631,502 Short-term debentures 68,492 24,009 Other 141,803 241,168 Total foreign offices 5,107,832 4,733,138 Total 6,732,118 16,056,193 Less unamortized discount 1,045 711 Other short-term borrowings—net ¥ 6,731,073 ¥ 16,055,482 Weighted average interest rate on outstanding balance at end of fiscal year 1.97 % 0.67 % Long-term debt (with original maturities of more than one year) at March 31, 2019 and 2020 was comprised of the following: 2019 2020 (in millions) MUFG: Obligations under finance leases ¥ 1,725 ¥ 6,552 Unsubordinated debt (1) Fixed rate bonds, payable in US dollars, due 2021-2039, principally 2.19%-4.29% 2,949,022 3,864,822 Fixed rate bonds, payable in Euro, due 2021-2033, principally 0.34%-1.75% 301,124 408,825 Fixed rate bonds, payable in other currencies, due 2024-2029, principally 2.08%-4.05% (2) 21,257 28,382 Floating rate bonds, payable in US dollars, due 2021-2023, principally 1.70%-3.46% 765,188 734,254 Floating rate bonds, payable in Euro, due 2023, principally 0.13% 43,596 41,843 Floating rate bonds, payable in other currencies, due 2024, principally 2.17% (2) — 26,436 Total 4,080,187 5,104,562 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2024-2030, principally 0.37%-1.39% 618,925 685,663 Adjustable rate bonds, payable in Japanese yen, due 2025-2030, principally 0.29%-0.63% 890,359 1,043,336 Adjustable rate bonds, payable in Japanese yen, no stated maturity, principally 0.82%-3.52% 1,706,695 1,756,087 Adjustable rate borrowings, payable in Japanese yen, due 2025-2029, principally 0.30%-0.50% 32,500 47,500 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 0.85%-1.17% 45,960 66,649 Floating rate bonds, payable in Japanese yen, no stated maturity, principally 3.02% 3,500 3,500 Floating rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.57%-0.79% 86,000 86,000 Total 3,383,939 3,688,735 Total 7,465,851 8,799,849 MUFG Bank: Obligations under finance leases ¥ 7,704 ¥ 5,636 Obligation under sale-and-leaseback 40,732 — Un s (1) Fixed rate bonds, payable in Japanese yen, due 2020-2027, principally 0.36%-2.57% 234,500 141,700 Fixed rate bonds, payable in US dollars, due 2020-2050, principally 0.00%-4.70% 1,284,812 1,104,504 Fixed rate bonds, payable in Euro, due 2022-2037, principally 0.88%-2.06% 112,687 108,252 Fixed rate bonds, payable in other currencies, due 2021-2047, principally 0.00%-5.30% (2) 19,084 17,620 Fixed rate borrowings, payable in Japanese yen, due 2020-2028, principally 0.00%-0.25% 10,786,372 10,440,217 Fixed rate borrowings, payable in US dollars, due 2030, principally 2.93% — 8,367 Fixed rate borrowings, payable in other currencies, due 2030, principally 2.93% (2) 9,483 — Adjustable rate bonds, payable in US dollars, due 2030, principally 3.00% 1,110 — Floating rate borrowings, payable in US dollars, due 2020-2031, principally 0.79%-2.38% 1,008,949 897,170 Floating rate borrowings, payable in Euro, due 2021-2030, principally 0.00%-0.20% 15,382 102,123 Floating rate borrowings, payable in other currencies, due 2028, principally 3.23% (2) 5,240 — Total 13,477,619 12,819,953 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2020-2031, principally 1.31%-2.91% 513,420 490,590 Fixed rate borrowings, payable in Japanese yen, due 2022-2035, principally 0.26%-2.24% 73,400 73,400 Adjustable rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.38%-1.04% 20,000 12,000 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 2.67%-3.52% 355,000 13,500 Floating rate borrowings, payable in Japanese yen, due 2027, principally 0.14% 15,000 15,000 Total 976,820 604,490 Obligations under loan securitization transaction accounted for as secured borrowings due 2020-2080, principally 0.12%-6.14% 639,037 791,139 Total 15,141,912 14,221,218 2019 2020 (in millions) Other subsidiaries: Obligations under finance leases ¥ 13,107 ¥ 12,998 Un S (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2050, principally 0.00%-20.00% 1,291,537 940,691 Fixed rate borrowings, bonds and notes, payable in US dollars, due 2020-2037, principally 0.00%-26.00% 1,385,936 1,106,465 Fixed rate borrowings, bonds and notes, payable in Euro, due 2020-2026, principally 0.00%-1.61% 2,479 2,965 Fixed rate borrowings, bonds and notes, payable in Thai baht, due 2020-2026, principally 0.00%-7.15% 334,586 387,799 Fixed rate borrowings, bonds and notes, payable in other currencies, due 2020-2037, principally 0.00%-15.33% (2) 219,781 360,558 Floating/Adjustable rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2050, principally 0.00%-7.70% 1,425,387 1,259,427 Floating rate borrowings, bonds and notes, payable in US dollars, due 2020-2028, principally 0.00%-16.00% 244,253 378,217 Floating rate bonds and notes, payable in Euro, due 2020-2022, principally 0.00% — 835 Floating/Adjustable rate borrowings, bonds and notes, payable in other currencies, due 2020-2024, principally 0.00%-7.30% (2) 6,241 6,804 Total 4,910,200 4,443,761 Subordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2030, principally 1.14%-2.61% 269,373 223,095 Fixed rate bonds and notes, payable in US dollars, due 2022-2027, principally 7.50%-9.90% 1,409 737 Fixed rate bonds and notes, payable in Thai baht, due 2020-2029, principally 3.40%-3.90% 143,212 220,756 Fixed rate bonds and notes, payable in other currencies, due 2021, principally 0.00% (2) 7,347 7,179 Adjustable rate borrowings, bonds and notes, payable in Japanese yen, no stated maturity, principally 2.83% 4,500 — Floating rate borrowing s 41,000 2,000 Floating rate bonds and notes, payable in US dollars, due 2020-2036, principally 3.59%-10.92% 5,172 4,575 Total 472,013 458,342 Obligations under loan securitization transaction accounted for as secured borrowings due 2021-2024, principally 0.25%-2.25% 2,813 6,453 Total 5,398,133 4,921,554 Total 28,005,896 27,942,621 Debt Isuance Cost ¥ (15,353 ) ¥ (15,858 ) Total ¥ 27,990,543 ¥ 27,926,763 Notes: (1) Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices. (2) Minor currencies, such as Australian dollar, British pound, Indonesian rupiah, Brazilian real, Russian ruble etc., excluding Japanese yen, US dollars, Euro and Thai baht, have been summarized into the “Other currencies” classification. The MUFG Group uses derivative financial certain from the coupon rates. The interest rates for the adjustable and floating rate debt shown in the above table are those Certain debt agreements permit the MUFG Group to redeem the related debt, in whole or in part, prior to maturity at the option of the issuer on terms specified in the respective agreements. The following is a summary of maturities of long-term debt subsequent to March 31, 2020: MUFG BK Other Total (in millions) Fiscal year ending March 31: 2021 ¥ 303,428 ¥ 8,550,560 ¥ 1,270,513 ¥ 10,124,501 2022 778,600 2,165,072 919,608 3,863,280 2023 876,475 637,647 1,059,402 2,573,524 2024 731,255 1,072,061 411,279 2,214,595 2025 719,364 292,304 267,980 1,279,648 2026 and thereafter 5,390,727 1,503,574 992,772 7,887,073 Total ¥ 8,799,849 ¥ 14,221,218 ¥ 4,921,554 ¥ 27,942,621 New Issuances of Bonds for Basel III For the fiscal year ended March 31, 20 20 non-viable For the fiscal year ended March 31, 20 20 € million), AUD 500 million (approximately ¥33,045 million) and

Severance Indemnities and Pensi

Severance Indemnities and Pension Plans [Text Block]	12 Months Ended
Severance Indemnities and Pension Plans [Text Block]	Mar. 31, 2020
Retirement Benefits [Abstract]
Severance Indemnities and Pension Plans [Text Block]	13. SEVERANCE INDEMNITIES AND PENSION PLANS Defined Benefit Pension Plans The MUFG Group has funded non-contributory MUFG Bank and certain domestic subsidiaries, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings, Mitsubishi UFJ NICOS and some subsidiaries of MUFG have non-contributory The MUFG Group also offers qualified and nonqualified defined benefit pension plans in foreign offices and subsidiaries for their employees. The qualified plans are non-contributory provide benefits upon retirement based on years of service and average non-contributory Severance Indemnities Plans The MUFG Group has SIPs under which their employees in Japan, other than those who are directors, are entitled, under most circumstances, upon mandatory retirement at normal retirement age or earlier termination of employment, to lump-sum lump-sum Other Postretirement Plans The MUFG Group’s foreign offices and subsidiaries, primarily in the United States of America, provide their employees with certain postretirement medical and life insurance benefits (“other benefits”). Net periodic cost of pension benefits and other benefits for the fiscal years ended March 31, 2018, 2019 and 2020 include the following components: Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2020 2018 2019 2020 Pension Pension Pension Pension Other Pension Other Pension Other (in millions) Service cost—benefits earned during the fiscal year ¥ 47,064 ¥ 48,352 ¥ 49,194 ¥ 10,169 ¥ 676 ¥ 12,395 ¥ 525 ¥ 14,406 ¥ 366 Interest cost on projected benefit obligation 14,383 13,504 10,969 15,359 1,079 14,958 1,046 17,370 1,159 Expected return on plan assets (68,432 ) (74,270 ) (74,744 ) (32,110 ) (2,122 ) (33,266 ) (2,314 ) (31,382 ) (1,882 ) Amortization of net actuarial loss 7,309 731 5,641 8,847 1,124 9,993 707 8,685 1,162 Amortization of prior service cost (1,094 ) (1,210 ) (1,204 ) (3,090 ) (2,775 ) (3,039 ) (2,020 ) (2,633 ) (1,881 ) Loss (gain) on settlements and curtailment (4,394 ) (5,980 ) (2,366 ) 52 — 49 — 223 — Net periodic benefit cost (income) ¥ (5,164 ) ¥ (18,873 ) ¥ (12,510 ) ¥ (773 ) ¥ (2,018 ) ¥ 1,090 ¥ (2,056 ) ¥ 6,669 ¥ (1,076 ) The following table summarizes the assumptions used in computing the present value of the projected benefit obligations and the net periodic benefit cost: Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2020 2018 2019 2020 Pension Pension Pension Pension Other Pension Other Pension Other Weighted-average assumptions used: Discount rates in determining expense 0.82 % 0.76 % 0.61 % 3.52 % 3.61 % 3.19 % 3.27 % 3.80 % 3.87 % Discount rates in determining benefit obligation 0.76 0.61 0.63 3.38 3.43 3.87 3.99 3.05 2.96 Rates of increase in future compensation level for 3.23 3.21 3.21 4.65 — 4.65 — 5.01 — Rates of increase in future compensation level for determining benefit obligation 3.21 3.21 3.46 4.65 — 5.01 — 5.12 — Expected rates of return on plan assets 2.87 2.83 2.89 6.71 7.50 6.70 7.50 6.25 7.00 The following tables present the assumed health care cost trend rates for foreign offices and subsidiaries, which are used to measure the expected cost of benefits for the next year, and the effect of a one-percentage- MUAH Other than MUAH 2019 (1) 2020 (1) 2019 (1) 2020 (1) Initial trend rate 4.44 % 4.14 % 7.00 % 6.50 % Ultimate trend rate 3.94 % 3.77 % 4.50 % 4.50 % Year the rate reaches the ultimate trend rate 2027 2027 2027 2027 MUAH Other than MUAH One-percentage- One-percentage- One-percentage- One-percentage- (in millions) Effect on total of service and interest cost components ¥ 152 ¥ (128 ) ¥ 42 ¥ (33 ) Effect on postretirement benefit obligation 2,823 (2,394 ) 838 (665 ) Note: (1) Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2018 and 2019, respectively. The following table sets forth the combined funded status and amounts recognized in the accompanying consolidated balance sheets at March 31, 2019 and 2020: Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Non-contributory Non-contributory Pension Other Pension Other (in millions) Change in benefit obligation: Benefit obligation at beginning of fiscal year ¥ 1,821,794 ¥ 1,841,884 ¥ 502,056 ¥ 34,347 ¥ 469,080 ¥ 31,510 Service cost 48,352 49,194 12,395 525 14,406 366 Interest cost 13,504 10,969 14,958 1,046 17,370 1,159 Plan participants’ contributions — — 37 452 28 455 Acquisitions/ Divestitures (160 ) (94 ) (17 ) — 13,000 — Amendments — — 64 — 3,721 — Actuarial loss (gain) 43,527 (3,053 ) (28,466 ) (2,354 ) 58,831 1,648 Benefits paid (66,539 ) (66,771 ) (19,894 ) (2,221 ) (21,120 ) (2,326 ) Lump-sum (18,594 ) (24,224 ) (1,750 ) — (2,284 ) — Translation adjustments and other — — (10,303 ) (285 ) (6,019 ) (429 ) Benefit obligation at end of fiscal year 1,841,884 1,807,905 469,080 31,510 547,013 32,383 Change in plan assets: Fair value of plan assets at beginning of fiscal year 2,603,329 2,594,788 542,646 32,466 493,495 28,258 Actual return on plan assets 13,664 (123,802 ) (21,353 ) (1,948 ) 92,087 5,695 Employer contributions 44,427 28,653 3,117 102 2,887 186 Acquisitions/ Divestitures (93 ) (21 ) — — 791 — Plan participants’ contributions — — 37 452 28 455 Benefits paid (66,539 ) (66,771 ) (19,894 ) (2,221 ) (21,120 ) (2,326 ) Translation adjustments and other — — (11,058 ) (593 ) (8,660 ) (349 ) Fair value of plan assets at end of fiscal year 2,594,788 2,432,847 493,495 28,258 559,508 31,919 Amounts recognized in the consolidated balance sheets: Prepaid benefit cost ¥ 770,564 ¥ 643,520 ¥ 67,821 ¥ 1,372 ¥ 81,301 ¥ 4,378 Accrued benefit cost (17,660 ) (18,577 ) (43,406 ) (4,624 ) (68,806 ) (4,842 ) Net amount recognized ¥ 752,904 ¥ 624,943 ¥ 24,415 ¥ (3,252 ) ¥ 12,495 ¥ (464 ) The aggregated accumulated benefit obligations of these plans at March 31, 2019 and 2020 were as follows: Domestic Foreign offices 2019 2020 2019 2020 (in millions) Aggregated accumulated benefit obligations ¥ 1,800,992 ¥ 1,773,042 ¥ 457,048 ¥ 523,078 The projected benefit obligations, accumulated benefit obligations and fair value of plan assets for the plans with accumulated benefit obligations in excess of plan assets at March 31, 2019 and 2020 were as follows: Domestic Foreign offices 2019 2019 (in millions) Projected benefit obligations ¥ 23,108 ¥ 26,442 ¥ 63,273 ¥ 89,829 Accumulated benefit obligations 23,108 26,442 52,249 67,609 Fair value of plan assets 5,629 7,980 19,866 21,014 MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Securities Holdings, Mitsubishi UFJ NICOS and other subsidiaries paid special lump-sum The following table presents the amounts recognized in Accumulated OCI of the MUFG Group at March 31, 2019 and 2020: Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss ¥ 245,037 ¥ 437,254 ¥ 126,238 ¥ 8,628 ¥ 114,167 ¥ 5,164 Prior service cost (5,459 ) (4,255 ) (14,536 ) (4,263 ) (7,875 ) (2,304 ) Gross amount recognized in 239,578 432,999 111,702 4,365 106,292 2,860 Taxes (115,816 ) (174,915 ) (29,875 ) (1,282 ) (27,974 ) (874 ) Net amount recognized in ¥ 123,762 ¥ 258,084 ¥ 81,827 ¥ 3,083 ¥ 78,318 ¥ 1,986 The following table presents OCI for the fiscal years ended Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss (gain) arising during the year ¥ 104,132 ¥ 195,492 ¥ 26,155 ¥ 1,908 ¥ (1,732 ) ¥ (2,166 ) Prior service cost arising during the year — — 65 — 3,722 — Losses (gains) due to amortization: Net actuarial loss (731 ) (5,641 ) (9,993 ) (707 ) (8,685 ) (1,162 ) Prior service cost 1,210 1,204 3,039 2,020 2,633 1,881 Curtailment and settlement 5,980 2,366 (49 ) — (223 ) — Foreign currency translation adjustments — — (1,399 ) (68 ) (1,125 ) (58 ) Total changes in Accumulated OCI ¥ 110,591 ¥ 193,421 ¥ 17,818 ¥ 3,153 ¥ (5,410 ) ¥ (1,505 ) Investment policies MUFG’s investment policy for plan assets is based on an asset liability matching strategy which is intended to maintain adequate liquidity for benefit payments and to achieve a stable increase in the plan assets in the medium and long-term through proper risk control and return maximization. As a general rule, investment policies for plan assets are reviewed periodically for some plans and in the following situations for all plans: (1) large fluctuations in pension plan liabilities caused by modifications to pension plans, or (2) changes in the market environment. The plan assets allocation strategies are the principal determinant in achieving expected investment returns on the plan assets. Actual asset allocations may fluctuate within acceptable ranges due to market value variability. Plan assets are managed by a combination of internal and external asset management companies and are rebalanced when market fluctuations cause an asset category to fall outside of its strategic asset allocation range. Performance of each plan asset category is compared against The weighted-average target asset allocation of plan assets for the pension benefits and other benefits at March 31, 2020 was as follows: Domestic Foreign offices Asset category Pension Pension Other Japanese equity securities 35.9 % 0.4 % — % Japanese debt securities 33.6 — — Non-Japanese 15.0 49.2 70.0 Non-Japanese 10.4 38.3 30.0 Real estate 1.4 10.4 — Short-term assets 3.7 1.7 — Total 100.0 % 100.0 % 100.0 % Basis and procedure for estimating long-term return of each asset category MUFG’s expected long-term rate of return on plan assets for domestic defined benefit pension plans and SIPs is based on a building-block methodology, which calculates the total long-term rate of return of the plan assets by aggregating the weighted rate of return derived from both long-term historical performance and forward-looking return expectations from each asset category. MUFG has determined the expected long-term rate of return for each asset category as follows: • Japanese equity securities: the rate for Japanese debt securities plus a premium for the risk associated with Japanese equity securities • Japanese debt securities: economic growth rate of Japan • Non-Japanese non-Japanese non-Japanese • Non-Japanese Foreign offices and subsidiaries periodically reconsider the expected long-term rate of return for their plan assets. They evaluate the investment return volatility of different asset categories and compare the liability structure of their pension and other benefits to those of other companies, while considering their funding policy to maintain a funded status sufficient to meet participants’ benefit obligations, and reduce long-term funding requirements and pension costs. Based on this information, foreign offices and subsidiaries update the expected long-term rate of return. Estimated future benefit payments The following table presents benefit payments expected to be paid, which include the effect of expected future service for the fiscal years indicated: Domestic Foreign offices Pension Pension Other (in millions) Fiscal year ending March 31: 2021 ¥ 83,009 ¥ 21,368 ¥ 2,023 2022 82,073 22,901 2,075 2023 82,115 23,747 2,111 2024 81,988 24,893 2,125 2025 81,902 25,614 2,089 Thereafter (2026-2030) 397,860 165,065 9,040 F The following is a description of the valuation methodologies used for plan assets measured at fair value as well as the classification of the plan assets pursuant to the fair value hierarchy described in Note 31 . Government bonds and other debt securities When quoted prices are available in an active market, the MUFG Group adopts the quoted prices to measure the fair value of securities and such securities are classified in Level 1 of the fair value hierarchy. Level 1 securities include Japanese government bonds, most non-Japanese non-binding non-Japanese non-Japanese Marketable equity securities When quoted prices are available in an active market, the MUFG Group adopts the quoted prices to measure the fair value of marketable equity securities and such securities are classified in Level 1 of the fair value hierarchy. When quoted prices are available but not traded actively, such securities are classified in Level 2 of the fair value hierarchy. Japanese pooled funds Japanese pooled funds are investment fund vehicles designed for Japanese pension plan investments under Japanese pension trust fund regulations. Based upon the nature of the funds’ investments, Japanese pooled funds are categorized into four major fund types: Japanese marketable equity securities type, Japanese debt securities type, Non-Japanese Non-Japanese funds invest in short-term financial instruments or loans receivable. Japanese pooled funds are generally readily redeemable at their net asset values. The fair values of Japanese pooled funds are measured at their net asset values per share (or its equivalent) as a practical expedient. Other investment funds Other investment funds include mutual funds, private investments funds, common collective funds, private equity funds and real estate funds. The listed investment funds or mutual funds are valued at quoted prices and classified in Level 1 or Level 2 of the fair value hierarchy. When there is no available market quotation, the fair values are generally determined at net asset values per share (or its equivalent) as a practical expedient. Other investment funds classified in Level 3 of the fair value hierarchy consist of certain real estate funds whose fair values are not measured Japanese general accounts of life insurance companies These instruments are contracts with life insurance companies that guarantee return of a certain level of fixed income, which are mainly invested in assets with low market risk such as Japanese debt securities. They are measured at conversion value and classified in Level 2 of the fair value hierarchy. Other investments Other investments mainly consist of call loans and the rest consist of miscellaneous accounts such as deposits with banks and short-term investments. These instruments are generally classified in Level 1 or Level 2 of the fair value hierarchy depending on observability of the inputs to measure their fair values. The following table presents the fair value of each major category of plan assets as of March 31, 2019 and 2020: Pension benefits and SIP Investments: At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 At March 31, 2020 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 147,926 ¥ — ¥ — ¥ 147,926 ¥ — ¥ — ¥ — ¥ — Non-Japanese — — — — 42,135 5,185 — 47,320 Other debt securities 7,014 12,113 325 19,452 — 105,096 — 105,096 Japanese marketable equity securities 690,741 — — 690,741 — — — — Non-Japanese 47,655 235 — 47,890 26,981 616 — 27,597 Other investment funds — — — — 81,803 150,121 — 231,924 (2) Japanese general account of life insurance companies (1) — 217,898 — 217,898 — — — — Other investments 6,547 32,150 — 38,697 480 1,937 250 2,667 Total ¥ 899,883 ¥ 262,396 ¥ 325 ¥ 1,162,604 ¥ 151,399 ¥ 262,955 ¥ 250 ¥ 414,604 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2018 to March 31, 2019 and 1.24% from April 1, 2019 to March 31, 2020. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and common collective funds of respectively, which were held by MUFG Americas Holdings at December 31, 2018 and million, respectively, at December 31, 2019. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information. The following table presents fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient that were excluded from the above table as of March 31, 2019 and 2020: Domestic subsidiaries Foreign offices and Assets category 2019 2019 2020 (in millions) Japanese pooled funds: Japanese marketable equity securities ¥ 109,915 ¥ 125,218 ¥ — ¥ — Japanese debt securities 184,121 212,727 — — Non-Japanese 162,901 146,796 — — Non-Japanese 155,792 169,978 — — Other 134,306 100,798 — — Total pooled funds 747,035 755,517 — — Other investment funds 525,083 (1) 514,726 (1) 241,559 (2) 144,904 (2) Total ¥ 1,272,118 ¥ 1,270,243 ¥ 241,559 ¥ 144,904 Notes: (1) Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019 and ¥486,496 million and ¥13,891 million, respectively, at March 31, 2020. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of million, respectively, at March 31, 2019 and million, respectively, at March 31, 2020. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information. Other debt securities and Japanese debt securities in the above Pension benefits and SIP tables include ¥1,224 million (0.04% of plan assets) of debt securities issued by the MUFG Group at March 31, 2019 and ¥942 million (0.03% of plan assets) at March 31, 2020, respectively. Japanese marketable equity securities in the above Pension benefits and SIP tables include ¥5,414 million (0.18% of plan assets) of common stock issued by the MUFG Group at March 31, 2019 and ¥5,843 million (0.20% of plan assets) at March 31, 2020, respectively.

Other Assets and Liabilities _T

Other Assets and Liabilities [Text Block]	12 Months Ended
Other Assets and Liabilities [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Other Assets and Liabilities [Text Block]	14. OTHER ASSETS AND LIABILITIES Major components of other assets and liabilities at March 31, 2019 and 2020 were as follows: 2019 2020 (in millions) Other assets: Accounts receivable: Receivables from brokers, dealers and customers for securities transactions ¥ 1,141,075 ¥ 1,191,690 Other 1,394,794 1,212,511 Investments in equity method investees 2,487,389 2,421,154 Prepaid benefit cost (Note 13) 839,757 729,199 Cash collateral pledged for derivative transactions (Note 9) 1,276,897 1,696,108 Cash collateral for the use of Bank of Japan’s settlement infrastructure 911,528 965,546 Accrued interest (1) 359,648 308,448 Deferred tax assets (Note 8) (1) 89,719 113,031 Right-of-use — 393,435 Other 2,990,462 4,077,577 Total ¥ 11,491,269 ¥ 13,108,699 Other liabilities: Accounts payable: Payables to brokers, dealers and customers for securities transactions ¥ 1,289,672 ¥ 1,078,653 Other 1,308,733 1,251,260 Obligations to return securities received as collateral (Notes 15, 16 (1) 3,087,026 4,806,171 Accrued interest (1) 214,735 187,096 Deferred tax liabilities (Note 8) 624,062 541,368 Allowance for off-balance 119,307 56,995 Accrued benefit cost (Note 13) 65,690 92,225 Guarantees and indemnifications 45,346 39,601 Cash collateral received for derivative transactions (Note 9) 844,234 1,125,305 Obligations under operating leases (Note 7) — 482,813 Accrued and other liabilities 3,061,462 3,562,359 Total ¥ 10,660,267 ¥ 13,223,846 Note: (1) Certain reclassifications have been made to prior period to confirm to the current presentation. Investments in equity method investees include marketable equity securities carried at ¥1,936,468 million and ¥1,809,161 million at March 31, 2019 and 2020, respectively. Corresponding aggregated market values were common stock carried at ¥1,326,339 million and ¥1,411,131 million at March 31, 2019 and 2020, respectively. As of March 31, 2020, the MUFG Group held approximately 23.93% of its common stock. Investments in equity method investees also include investments in Morgan Stanley MUFG Securities, Co., Ltd. at ¥178,679 million and ¥185,255 million at March 31, 2019 and 2020, respectively. The MUFG Group periodically evaluates whether a loss in value of investments in equity method investees is other-than-temporary. As a result of evaluations, the MUFG Group recognized other-than-temporary declines in the value of an investment and recorded impairment losses related to certain affiliated companies of ¥29,442 million, ¥51,645 million and ¥21,672 million for the fiscal years ended March 31, 2018, 2019 and 2020 respectively. The impairment losses are included in Equity in earnings of equity method investees—net in the accompanying consolidated statements of income. Summarized Financial Information of the MUFG Group’s Equity Method Investees Summarized financial information of Morgan Stanley, the largest portion of the MUFG Group’s equity method investees, as of March 31, 2019 and 2020, and for each of the three years ended March 31, 2020 is as follows: 2019 2020 (in billions) Trading assets ¥ 29,392 ¥ 29,484 Securities purchased under agreements to resell 10,718 11,405 Securities borrowed 15,416 7,868 Total assets 97,223 103,149 Deposits 19,948 25,601 Customer and other payables 21,431 21,556 Borrowings 21,165 21,206 Total liabilities 88,134 93,656 Noncontrolling interests 130 149 2018 2019 2020 (in billions) Net revenues ¥ 4,354 ¥ 4,365 ¥ 4,415 Total non-interest 3,133 3,170 3,275 Income from continuing operations before income taxes 1,221 1,195 1,140 Net income applicable to Morgan Stanley 759 944 903 Morgan Stanley early adopted the new accounting guidance on “Targeted Improvements to Accounting for Hedging Activities” on January 1, 2018. This resulted in recording a cumulative catch-up Summarized financial information of the MUFG Group’s equity method investees 2019 2020 (in billions) Net loans ¥ 15,772 ¥ 15,190 Total assets 28,910 29,255 Deposits 9,103 8,898 Total liabilities 23,423 24,025 Noncontrolling interests 1,135 1,005 2018 2019 2020 (in billions) Total interest income ¥ 901 ¥ 1,036 ¥ 1,093 Total interest expense 329 430 419 Net interest income 572 606 674 Provision for credit losses 136 157 171 Income before income tax expense 337 205 366 Net income 229 135 285

Offsetting of Derivatives, Repu

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block]	15. OFFSETTING OF DERIVATIVES, REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS The following tables present, as of March 31, 2019 and 2020, the gross and net amounts of derivatives, resale and repurchase agreements, and securities borrowing and lending transactions, including the related gross amounts subject to an enforceable master netting arrangement or similar agreement not offset in the consolidated balance sheets. The MUFG Group primarily enters into International Swaps and Derivatives Association master netting agreements, master repurchase agreements and master securities lending agreements or similar agreements for derivative contracts, resale and repurchase agreements, and securities borrowing and lending transactions. In the event of default on or termination of any one contract, these agreements provide the contracting parties with the right to net a counterparty’s rights and obligations and to liquidate and setoff collateral against any net amount owed by the counterparty. Generally, as the MUFG Group has elected to present such amounts on a gross basis, the amounts subject to these agreements are included in “Gross amounts not offset in the consolidated balance sheet” column in the tabular disclosure below. For certain transactions where a legal opinion with respect to the enforceability of netting has not been sought or obtained, the related amounts are not subject to enforceable master netting agreements and not included in “Gross amounts not offset in the consolidated balance sheet” column in the tabular disclosure below. At March 31, 2019 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 13,205 ¥ — ¥ 13,205 ¥ (10,752 ) ¥ (590 ) ¥ 1,863 Receivables under resale agreements 13,885 (2,910 ) 10,975 (9,793 ) (20 ) 1,162 Receivables under securities borrowing transactions 2,759 — 2,759 (2,693 ) — 66 Total ¥ 29,849 ¥ (2,910 ) ¥ 26,939 ¥ (23,238 ) ¥ (610 ) ¥ 3,091 Financial liabilities: Derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ (10,671 ) ¥ (933 ) ¥ 1,106 Payables under repurchase agreements 28,125 (2,900 ) 25,225 (24,930 ) (15 ) 280 Payables under securities lending transactions 913 — 913 (880 ) — 33 Obligations to return securities received as collateral 3,087 — 3,087 (1,244 ) — 1,843 Total ¥ 44,835 ¥ (2,900 ) ¥ 41,935 ¥ (37,725 ) ¥ (948 ) ¥ 3,262 At March 31, 2020 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ (11,282 ) ¥ (874 ) ¥ 2,802 Receivables under resale agreements 25,884 (1,888 ) 23,996 (23,195 ) (21 ) 780 Receivables under securities borrowing transactions 3,444 — 3,444 (3,336 ) — 108 Total ¥ 44,286 ¥ (1,888 ) ¥ 42,398 ¥ (37,813 ) ¥ (895 ) ¥ 3,690 Financial liabilities: Derivative liabilities ¥ 14,034 ¥ — ¥ 14,034 ¥ (11,296 ) ¥ (1,140 ) ¥ 1,598 Payables under repurchase agreements 33,733 (1,883 ) 31,850 (31,569 ) (34 ) 247 Payables under securities lending transactions 1,017 — 1,017 (986 ) — 31 Obligations to return securities received as collateral 4,806 — 4,806 (1,966 ) — 2,840 Total ¥ 53,590 ¥ (1,883 ) ¥ 51,707 ¥ (45,817 ) ¥ (1,174 ) ¥ 4,716

Repurchase Agreements, and Secu

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block]	16. REPURCHASE AGREEMENTS, AND SECURITIES LENDING TRANSACTIONS ACCOUNTED FOR AS SECURED BORROWINGS The following tables present gross obligations for payables under repurchase agreements, payables under securities lending transactions and obligations to return securities received as collateral by remaining contractual maturity and class of collateral pledged at March 31, 2019 and 2020. Potential risks associated with these arrangements primarily relate to market and liquidity risks. To manage risks associated with market exposure, the MUFG Group generally revalues the collateral underlying its repurchase agreements and securities lending transactions on a daily basis and monitors the value of the underlying securities, consisting of primarily high-quality securities such as Japanese national government and Japanese government agency bonds, and foreign government and official institution bonds. In the event the market value of such securities falls below the related agreements at contract amounts plus accrued interest, the MUFG Group may be required to deposit additional collateral when appropriate. To address liquidity risks, the MUFG Group conducts stress tests to ensure the adequate level of liquidity is maintained in the event of a decline in the fair value of any collateral pledged. March 31, 2019 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 3,892 ¥ 18,586 ¥ 2,824 ¥ 2,823 ¥ 28,125 Payables under securities lending transactions 913 — — — 913 Obligations to return securities received as collateral 2,572 396 117 2 3,087 Total ¥ 7,377 ¥ 18,982 ¥ 2,941 ¥ 2,825 ¥ 32,125 March 31, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 9,685 ¥ 16,608 ¥ 4,496 ¥ 2,944 ¥ 33,733 Payables under securities lending transactions 934 64 19 — 1,017 Obligations to return securities received as collateral 3,856 599 276 75 4,806 Total ¥ 14,475 ¥ 17,271 ¥ 4,791 ¥ 3,019 ¥ 39,556 Secured borrowing by the class of collateral pledged at March 31, 2019 and 2020 was as follows: March 31, 2019 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 8,306 ¥ 21 ¥ 856 ¥ 9,183 Foreign government and official institution bonds 14,291 — 1,286 15,577 Corporate bonds 705 — 172 877 Residential mortgage-backed securities 4,369 — — 4,369 Other debt securities 238 — — 238 Marketable equity securities 200 892 772 1,864 Other 16 — 1 17 Total ¥ 28,125 ¥ 913 ¥ 3,087 ¥ 32,125 March 31, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 10,687 ¥ 38 ¥ 2,241 ¥ 12,966 Foreign government and official institution bonds 17,326 57 873 18,256 Corporate bonds 784 — 183 967 Residential mortgage-backed securities 4,248 — 10 4,258 Other debt securities 157 — 2 159 Marketable equity securities 506 914 1,497 2,917 Other 25 8 — 33 Total ¥ 33,733 ¥ 1,017 ¥ 4,806 ¥ 39,556

Preferred Stock _Text Block_

Preferred Stock [Text Block]	12 Months Ended
Preferred Stock [Text Block]	Mar. 31, 2020
Equity [Abstract]
Preferred Stock [Text Block]	17. PREFERRED STOCK Pursuant to the Articles of Incorporation, MUFG had been authorized to issue 400,000,000 shares of Class 5 Preferred Stock, 200,000,000 shares of Class 6 Preferred Stock, and 200,000,000 shares of Class 7 Preferred Stock without par value as of March 31, 2020. All classes of preferred stock are non-voting non-cumulative non-participating As of March 31, 2018, 2019 and 2020, there was no preferred stock outstanding and the entire amount of Capital stock on the consolidated balance sheets consisted of only common stock.

Common Stock and Capital Surplu

Common Stock and Capital Surplus [Text Block]	12 Months Ended
Common Stock and Capital Surplus [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Common Stock and Capital Surplus [Text Block]	18. COMMON STOCK AND CAPITAL SURPLUS The changes in the number of issued shares of common stock during the fiscal years ended March 31, 2018, 2019 and 2020 were as follows: 2018 2019 2020 (shares) Balance at beginning of fiscal year 14,168,853,820 13,900,028,020 13,667,770,520 Retirement of shares of common stock (268,825,800 ) (232,257,500 ) (85,775,400 ) Balance at end of fiscal year 13,900,028,020 13,667,770,520 13,581,995,120 Under the Companies Act, issuances of common stock, including conversions of bonds and notes, are required to be credited to the common stock account for at least 50% of the proceeds and to the legal capital surplus account (“legal capital surplus”) for the remaining amounts. The Companies Act permits Japanese companies, upon approval by the Board of Directors, to issue shares in the form of a “stock split,” as defined in the Companies Act. Also, prior to April 1, 1991, Japanese companies were permitted to issue free share distributions. MUFG Bank and Mitsubishi UFJ Trust and Banking from time to time made free share distributions. These free distributions usually ranged from 5% to 10% of outstanding common stock and publicly-owned corporations in the United States issuing shares in similar transactions would be required to account for them as stock dividends as of the shareholders’ record date by reducing retained earnings and increasing the appropriate capital accounts by an amount equal to the fair value of the shares issued. The application of such U.S. accounting practices to the cumulative free distributions made by MUFG Bank and Mitsubishi UFJ Trust and Banking at March 31, 2020, would have increased capital accounts by ¥1,910,106 million with a corresponding decrease in unappropriated retained earnings. The Companies Act permits that common stock, legal reserve, additional paid-in paid-in As for Capital surplus, the fee retained by MUFG’s subsidiary as underwriting compensation, net of stock issuance expense, was included in the total Capital surplus balance. Treasury Stock The Companies Act permits Japanese companies to effect purchases of their own shares pursuant to a resolution by the shareholders at an annual general meeting until the conclusion of the following ordinary general meeting of shareholders, and to hold such shares as their treasury stock indefinitely regardless of purpose. However, the Companies Act requires the amount of treasury stock purchased should be within the amount of retained earnings available for dividends. Disposition of treasury stock is subject to the approval of the Board of Directors and is to follow the procedures similar to a public offering of shares for subscription. From May 16, 2017 to June 21, 2017 MUFG repurchased 141,158,900 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion in aggregate in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2017. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.49% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On July 20, 2017, MUFG cancelled all the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2017. From November 15, 2017 to December 22, 2017, MUFG repurchased 127,666,900 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2017. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.50% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On January 22, 2018, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 14, 2017. From May 16, 2018 to June 4, 2018, MUFG repurchased 72,420,700 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥50 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2018. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 100,000,000 shares, which represents the equivalent of 0.76% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥50 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On July 20, 2018, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on May 15, 2018. From November 14, 2018 to December 10, 2018, MUFG repurchased 159,836,800 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥100 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2018. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 200,000,000 shares, which represents the equivalent of 1.52% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥100 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On January 22, 2019, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2018. From November 14, 2019 to December 23, 2019, MUFG repurchased 85,775,400 shares of MUFG’s common stock by market purchases based on the discretionary dealing contract regarding repurchase of own shares for approximately ¥50 billion, in aggregate, in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2019. The repurchase plan as authorized by the Board of Directors of MUFG allowed for the repurchase of an aggregate amount of up to 100,000,000 shares, which represents the equivalent of 0.77% of the total number of common shares outstanding, or of an aggregate repurchase amount of up to ¥50 billion. The purpose of the repurchase is to enhance the return of earnings to shareholders, to improve capital efficiency, and to implement flexible capital policies. On January 20, 2020, MUFG cancelled all of the acquired shares in satisfaction of the resolution adopted at the meeting of the Board of Directors of MUFG held on November 13, 2019.

Retained Earnings, Legal Reserv

Retained Earnings, Legal Reserve and Dividends [Text Block]	12 Months Ended
Retained Earnings, Legal Reserve and Dividends [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Retained Earnings, Legal Reserve and Dividends [Text Block]	19. RETAINED EARNINGS, LEGAL RESERVE AND DIVIDENDS In addition to the Companies Act, Japanese banks, including MUFG Bank and Mitsubishi UFJ Trust and Banking, are required to comply with the Banking Law of Japan (the “Banking Law”). Legal Reserve Set Aside as Appropriation of Retained Earnings and Legal Capital Surplus Under the Companies Act The Companies Act provides that an amount at least equal to 10% of the aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash outlays applicable to each period shall be appropriated and set aside as a legal reserve until the aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus equals 25% of stated capital as defined in the Companies Act. Under the Banking Law The Banking Law provides that an amount at least equal to 20% of the aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash outlays applicable to each fiscal year shall be appropriated and set aside as a legal reserve until the aggregate amount of legal reserve set aside as appropriation of retained earnings and the legal capital surplus equals 100% of stated capital as defined in the Companies Act. Transfer of Legal Reserve Under the Companies Act Under the Companies Act, Japanese companies, including MUFG, were permitted, pursuant to a resolution by the shareholders at a general meeting, to make legal reserve set aside as appropriation of retained earnings and legal capital surplus available for dividends until the aggregate amount of the legal reserve and legal capital surplus equals 25% of stated capital as defined in the Companies Act. Under the Companies Act, Japanese companies, including MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking, are permitted, primarily pursuant to a resolution by the shareholders at a general meeting, to transfer legal capital surplus and legal reserve to stated capital and/or retained earnings without limitations of thresholds, thereby effectively removing the thresholds provided for in the Companies Act and Banking Law at the company’s discretion. Under the Banking Law Under the Banking Law, Japanese banks, including MUFG Bank and Mitsubishi UFJ Trust and Banking, were permitted, pursuant to a resolution by the shareholders at a general meeting, to set aside a legal reserve as an appropriation of retained earnings and legal capital surplus available for dividends until the aggregate amount of the legal reserve and legal capital surplus equals 100% of stated capital as defined in the Companies Act. Unappropriated Retained Earnings and Dividends In addition to the provision that requires an appropriation for legal reserve as described above, the Companies Act and the Banking Law impose certain limitations on the amount available for dividends. Under the Companies Act, the amount available for dividends is based on the amount recorded in MUFG’s general books of account maintained in accordance with accounting principles generally accepted in Japan (“Japanese GAAP”). The adjustments included in the accompanying consolidated financial statements but not recorded in MUFG’s general books of account, as explained in Note 1, have no effect on the determination of retained earnings available for dividends under the Companies Act. Under the Banking Law, MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking have to meet the minimum capital adequacy requirements and distributions of retained earnings of MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking, which are otherwise distributable to shareholders, are restricted in order to maintain the minimum capital requirements. MUFG, formerly known as Mitsubishi Tokyo Financial Group, was established on April 2, 2001 with common stock of ¥924,400 million, preferred stock of ¥222,100 million, legal capital surplus of ¥2,838,693 million and no retained earnings in accordance with the Commercial Code of Japan (“the Code”), which was replaced by the Companies Act, and Japanese GAAP. On October 1, 2005, MUFG started with common stock and preferred stock of ¥1,383,052 million, a legal capital surplus of ¥3,577,570 million and retained earnings of ¥757,458 million in accordance with the Code and Japanese GAAP. MUFG’s amount available for dividends, at March 31, 2020, was ¥4,298,735 million, which is based on the amount recorded in MUFG’s general books of account under Japanese GAAP. Annual dividends, including those for preferred stock, are approved by the shareholders at an annual general meeting held subsequent to the fiscal year to which the dividends are applicable. In addition, a semi-annual interim dividend payment may be made by resolution of the Board of Directors, subject to limitations imposed by the Companies Act and the Banking Law. In the accompanying consolidated statements of equity, dividends and appropriations to legal reserve shown for each fiscal year represent dividends approved and paid during the fiscal year and the related appropriation to legal reserve.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss) [Text Block]	12 Months Ended
Accumulated Other Comprehensive Income (Loss) [Text Block]	Mar. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss) [Text Block]	20. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table presents the changes in Accumulated OCI, net of tax and net of noncontrolling interests, for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on investment securities (1) Balance at beginning of fiscal year ¥ 2,032,807 ¥ 2,270,346 ¥ (369,369 ) Net change during the fiscal year 244,249 60,616 24,584 Effect of adopting new guidance by a foreign affiliated company 118 — — Effect of adopting new guidance on reclassification on certain tax effects (6,828 ) — — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities ( Note 1) — (2,700,331 ) — Balance at end of fiscal year ¥ 2,270,346 ¥ (369,369 ) ¥ (344,785 ) Net debt valuation adjustments: Balance at beginning of fiscal year ¥ (10,632 ) ¥ (16,488 ) ¥ (8,670 ) Net change during the fiscal year (2,178 ) 9,729 54,172 Effect of adopting new guidance on reclassification on certain tax effects (3,678 ) — — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — (1,911 ) — Balance at end of fiscal year ¥ (16,488 ) ¥ (8,670 ) ¥ 45,502 Net unrealized losses on derivatives qualifying for cash flow hedges: Balance at beginning of fiscal year ¥ (8,729 ) ¥ (19,250 ) ¥ (24,140 ) Net change during the fiscal year (7,025 ) (4,890 ) 10,797 Effect of adopting new guidance on reclassification on certain tax effects (3,496 ) — — Balance at end of fiscal year ¥ (19,250 ) ¥ (24,140 ) ¥ (13,343 ) Defined benefit plans: Balance at beginning of fiscal year ¥ (214,062 ) ¥ (119,593 ) ¥ (208,273 ) Net change during the fiscal year 109,012 (88,680 ) (129,645 ) Effect of adopting new guidance on reclassification on certain tax effects (14,543 ) — — Balance at end of fiscal year ¥ (119,593 ) ¥ (208,273 ) ¥ (337,918 ) Foreign currency translation adjustments: Balance at beginning of fiscal year ¥ 482,039 ¥ 362,300 ¥ 326,183 Net change during the fiscal year (119,213 ) (36,117 ) (96,056 ) Effect of adopting new guidance on reclassification on certain tax effects (526 ) — — Balance at end of fiscal year ¥ 362,300 ¥ 326,183 ¥ 230,127 Balance at end of fiscal year ¥ 2,477,315 ¥ (284,269 ) ¥ (420,417 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020. The following table presents the before tax and net of tax changes in each component of Accumulated OCI for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities (1) ¥ 631,154 ¥ (204,916 ) ¥ 426,238 ¥ 132,723 ¥ (24,690 ) ¥ 108,033 ¥ 100,974 ¥ (2,260 ) ¥ 98,714 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (280,258 ) 84,328 (195,930 ) (28,953 ) 9,100 (19,853 ) (107,102 ) 32,007 (75,095 ) Net change 350,896 (120,588 ) 230,308 103,770 (15,590 ) 88,180 (6,128 ) 29,747 23,619 Net unrealized gains (losses) on investment securities attributable to noncontrolling interests (13,941 ) 27,564 (965 ) Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 244,249 60,616 24,584 Net debt valuation adjustments: Net debt valuation (3,555 ) 1,088 (2,467 ) 13,006 (3,982 ) 9,024 77,765 (23,812 ) 53,953 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 417 (128 ) 289 1,016 (311 ) 705 315 (96 ) 219 Net change (3,138 ) 960 (2,178 ) 14,022 (4,293 ) 9,729 78,080 (23,908 ) 54,172 Net debt valuation adjustments attributable to noncontrolling interests — — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (2,178 ) 9,729 54,172 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges (3,430 ) 1,571 (1,859 ) (10,397 ) 2,825 (7,572 ) 1,375 (560 ) 815 Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (8,016 ) 2,850 (5,166 ) 3,662 (980 ) 2,682 13,279 (3,452 ) 9,827 Net change (11,446 ) 4,421 (7,025 ) (6,735 ) 1,845 (4,890 ) 14,654 (4,012 ) 10,642 Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests — — (155 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (7,025 ) (4,890 ) 10,797 2018 2019 2020 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Defined benefit plans: Defined benefit plans 154,708 (48,537 ) 106,171 (126,001 ) 37,655 (88,346 ) (195,851 ) 59,426 (136,425 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 5,904 (2,237 ) 3,667 (1,168 ) 574 (594 ) 6,643 (1,741 ) 4,902 Net change 160,612 (50,774 ) 109,838 (127,169 ) 38,229 (88,940 ) (189,208 ) 57,685 (131,523 ) Defined benefit plans attributable to noncontrolling interests 826 (260 ) (1,878 ) Defined benefit plans attributable to Mitsubishi UFJ Financial Group 109,012 (88,680 ) (129,645 ) Foreign currency translation adjustments: Foreign currency translation adjustments (137,811 ) 32,767 (105,044 ) (18,062 ) (17,932 ) (35,994 ) (99,520 ) 19,588 (79,932 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (1,494 ) 1,760 266 (9,002 ) 2,784 (6,218 ) (2,238 ) 1,105 (1,133 ) Net change (139,305 ) 34,527 (104,778 ) (27,064 ) (15,148 ) (42,212 ) (101,758 ) 20,693 (81,065 ) Foreign currency translation adjustments attributable to noncontrolling interests 14,435 (6,095 ) 14,991 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (119,213 ) (36,117 ) (96,056 ) Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ 224,845 ¥ (59,342 ) ¥ (136,148 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020. The following table presents the effect of the reclassification of significant items out of Accumulated OCI on the respective line items of the accompanying consolidated statements of income for the fiscal years ended March 31, 2018, 2019 and 2020: 2018 2019 2020 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale (1) ¥ (287,279 ) ¥ (29,182 ) ¥ (108,193 ) Investment securities gains Impairment losses on investment securities 6,759 596 1,590 Investment securities gains Other 262 (367 ) (499 ) (280,258 ) (28,953 ) (107,102 ) Total before tax 84,328 9,100 32,007 Income tax expense ¥ (195,930 ) ¥ (19,853 ) ¥ (75,095 ) Net of tax Net debt valuation adjustments ¥ 417 ¥ 1,016 ¥ 315 Equity in earnings of equity 417 1,016 315 Total before tax (128 ) (311 ) (96 ) Income tax expense ¥ 289 ¥ 705 ¥ 219 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (7,782 ) ¥ 3,739 ¥ 9,878 Interest income on Loans, Foreign exchange contracts — — 3,399 Interest expense on Long-term debt or Foreign exchange losses—net Other (234 ) (77 ) 2 (8,016 ) 3,662 13,279 Total before tax 2,850 (980 ) (3,452 ) Income tax expense ¥ (5,166 ) ¥ 2,682 ¥ 9,827 Net of tax Defined benefit plans Net actuarial loss (2) ¥ 17,280 ¥ 11,431 ¥ 15,488 Other non-interest Prior service cost (2) (6,959 ) (6,269 ) (5,718 ) Other non-interest Gain on settlements and curtailment, and other (2) (4,417 ) (6,330 ) (3,127 ) Other non-interest 5,904 (1,168 ) 6,643 Total before tax (2,237 ) 574 (1,741 ) Income tax expense ¥ 3,667 ¥ (594 ) ¥ 4,902 Net of tax 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Foreign currency translation adjustments ¥ (5,743 ) ¥ (9,004 ) ¥ (5,003 ) Other non-interest 4,249 2 2,765 Other non-interest (1,494 ) (9,002 ) (2,238 ) Total before tax 1,760 2,784 1,105 Income tax expense ¥ 266 ¥ (6,218 ) ¥ (1,133 ) Net of tax Total reclassifications for the period ¥ (283,447 ) ¥ (34,445 ) ¥ (89,103 ) Total before tax 86,573 11,167 27,823 Income tax expense ¥ (196,874 ) ¥ (23,278 ) ¥ (61,280 ) Net of tax Notes: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020 while included unrealized gains (losses) related to both debt and equity securities for the fiscal year ended March 31, 2018. (2) These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Regulatory Capital Requirements

Regulatory Capital Requirements [Text Block]	12 Months Ended
Regulatory Capital Requirements [Text Block]	Mar. 31, 2020
Banking and Thrift [Abstract]
Regulatory Capital Requirements [Text Block]	21. REGULATORY CAPITAL REQUIREMENTS Japan MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking and Mitsubishi UFJ Securities Holdings are subject to various regulatory capital requirements promulgated by the regulatory authorities of the countries in which they operate. Failure to meet minimum capital requirements will initiate certain mandatory actions by regulators that, if undertaken, could have a direct material effect on MUFG’s consolidated financial statements. In Japan, MUFG, MUFG Bank, and Mitsubishi UFJ Trust and Banking are subject to regulatory capital requirements promulgated by the Financial Services Agency of Japan (“FSA”) in accordance with the provisions of the Banking Law and related regulations. A banking institution is subject to the minimum capital requirements both on a consolidated basis and a stand-alone basis, and is required to maintain the minimum capital irrespective of whether it operates independently or as a subsidiary under the control of another company. When a bank holding company manages operations of its banking subsidiaries, it is required to maintain the minimum capital adequacy ratio on a consolidated basis in the same manner as its subsidiary banks. The FSA provides two sets of capital adequacy guidelines. One is a set of guidelines applicable to Japanese banks and bank holding companies with their foreign offices conducting international operations, as defined, and the other is applicable to Japanese banks and bank holding companies that are not engaged in international operations conducted by their foreign offices. The Basel Committee on Banking Supervision (“BCBS”) of the Bank for International Settlements (“BIS”) sets capital adequacy standards for all internationally active banks to ensure minimum levels of capital. The Basel Committee revised the 1988 Accord (“Basel I”) in June 2004 and released “International Convergence of Capital Measurement and Capital Standards: A Revised Framework” (“Basel II”). In addition, the Group of Central Bank Governors and Heads of Supervision reached an agreement on the new global regulatory framework, which has been referred to as “Basel III,” in July and September 2010. In December 2010, the Basel Committee agreed on the details of the Basel III rules. Effective as of March 31, 2013, Basel III was adopted by the FSA with transitional measures for Japanese banking institutions with international operations conducted by their foreign offices. MUFG calculated capital ratios as of March 31, 2019 and 2020 in accordance with Basel III. Capital Ratios Basel III, the same as Basel II, is based on “three pillars”: (1) minimum capital requirements, (2) the self-regulation of financial institutions based on supervisory review process, and (3) market discipline through the disclosure of information. The framework of the 1988 Accord, Basel I is improved and expanded to be included in “minimum capital requirements” as the first pillar of Basel II and Basel III. As for the denominator of the capital ratio, the Basel framework provides the following risk-based approaches and a range of options for determining risk-weighted assets. “Credit Risk” The Basel framework provides options for determining the risk-weighted assets for credit risk to allow banks to select approaches that are most appropriate for their level of risk assessment. Banks choose one of three approaches: “Standardized Approach,” “Foundation Internal Ratings-Based Approach” or “Advanced Internal Ratings-Based Approach (“AIRB”).” “Market Risk” In the “Amendment to the Capital Accord to incorporate market risks” of the year 1996, a choice between two methodologies “the Standardized Measurement Method” and “Internal Models Approach” is permitted. “Combination of Internal Models Approach and the Standardized Measurement Method” is also allowed under certain conditions. This is unchanged in Basel III. “Operational Risk” Operational risk, which is defined as the risk of loss resulting from inadequate or failed internal processes, people and systems or from external events, is newly added in Basel II. The Basel framework presents three methods for calculating operational risk capital charges: (i) the Basic Indicator Approach; (ii) the Standardized Approach; or (iii) Advanced Measurement Approaches (“AMA”). Banks adopt one of the three approaches to determine the risk-weighted assets for operational risk. Banks need to obtain approval from their supervisors prior to adopting the following approaches to calculate capital requirements for each risk: • the Advanced Internal Ratings-Based Approach for credit risk • the Internal Models Approach for market risk • the Standardized Approach and AMA for operational risk With approval from the FSA, MUFG and most of its major subsidiaries adopt AIRB to calculate capital requirements for credit risk, adopt the AMA to calculate capital requirements for operational risk, as for market risk, adopt the Internal Models Approach mainly to calculate general market risk and adopt the Standardized Measurement Method to calculate specific risk. The MUFG Group’s proprietary assets do not include trust assets under management and administration in a capacity of agent or fiduciary and, accordingly trust account assets are generally not included in the capital measure. However, guarantees for trust principal are counted as off-balance Under Basel III, as adopted by the FSA, MUFG’s risk-weighted assets increased, largely reflecting the new capital charge of the credit valuation adjustment (CVA), the credit risk related to asset value correlation multiplier for large financial institutions, and the 250% risk-weighted threshold items not deducted from Common Equity Tier 1 capital, as well as the conversion of certain Basel II capital deductions to risk-weighted assets, such as securitizations. On the other hand, as for the numerator of the capital ratio, there are three primary regulatory capital ratios used to assess capital adequacy, Common Equity Tier 1, Tier 1 and Total capital ratios, which are determined by dividing applicable capital components by risk-weighted assets. Tier 1 capital consists of Common Equity Tier 1 capital and Additional Tier 1 capital. Common Equity Tier 1 capital is primarily consisting of common stock, capital surplus, retained earnings, and Accumulated OCI. Regulatory adjustments including certain intangible fixed assets, such as goodwill, and defined-benefit pension fund assets, are made to Common Equity Tier 1. Additional Tier 1 capital generally consists of Basel III compliant preferred securities, and during the transition period, other capital that meets Tier 1 requirements under Basel II standards. Tier 2 capital generally consists of Basel III compliant subordinated debts, capital that meets Tier 2 requirements under Basel II standards during the transition period, certain allowances for credit losses, and noncontrolling interests in subsidiaries’ Tier 2 instruments. Total capital is defined as the sum of Tier 1 and Tier 2 capital. Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and the Global Systematically Important Bank (“G-SIB”), 2.5 % and a G-SIB 1.5 % as of March 31, 2019 and 2020, and a countercyclical buffer of 0.04% and % as of March 31, 2019 and 2020, respectively. Leverage Ratios The leverage ratio is designed for monitoring and preventing the build-up off-balance G-SIB G-SIB G-SIB The risk-adjusted capital amounts and ratios, and leverage ratios, of MUFG, MUFG Bank and Mitsubishi UFJ Trust and Banking presented in the following table are based on amounts calculated in accordance with Japanese GAAP as required by the FSA. Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Consolidated: At March 31, 2019: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,769,793 16.03 % ¥ 14,097,771 12.04 % BK 14,632,620 14.42 8,114,105 8.00 TB 2,213,195 24.40 725,540 8.00 Tier 1 capital (to risk-weighted assets): MUFG (1) 16,276,301 13.90 11,755,949 10.04 BK 12,639,454 12.46 6,085,579 6.00 TB 1,928,955 21.26 544,155 6.00 Common Equity Tier 1 capital (to risk-weighted assets): MUFG (1) 14,322,407 12.23 9,999,582 8.54 BK 10,990,820 10.83 4,564,184 4.50 TB 1,775,565 19.57 408,116 4.50 Leverage ratio (2) : MUFG 16,276,301 4.94 9,871,460 3.00 BK 12,639,454 4.63 8,189,494 3.00 TB 1,928,955 5.09 1,135,795 3.00 At March 31, 2020: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,279,566 15.87 % ¥ 13,827,788 12.01 % BK 14,285,601 14.43 7,917,895 8.00 TB 1,889,973 25.46 593,652 8.00 Tier 1 capital (to risk-weighted assets): MUFG (1) 15,623,321 13.56 11,525,076 10.01 BK 12,170,005 12.29 5,938,421 6.00 TB 1,625,712 21.90 445,239 6.00 Common Equity Tier 1 capital (to risk-weighted assets): MUFG (1) 13,708,333 11.90 9,798,042 8.51 BK 10,597,133 10.70 4,453,816 4.50 TB 1,444,348 19.46 333,929 4.50 Leverage ratio (2) : MUFG 15,623,321 4.42 10,593,527 3.00 BK 12,170,005 4.21 8,656,169 3.00 TB 1,625,712 4.51 1,079,863 3.00 Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Stand-alone: At March 31, 2019: Total capital (to risk-weighted assets): BK ¥ 13,560,583 15.58 % ¥ 6,959,207 8.00 % TB 2,195,098 24.25 723,953 8.00 Tier 1 capital (to risk-weighted assets): BK 11,773,839 13.53 5,219,405 6.00 TB 1,911,237 21.12 542,965 6.00 Common Equity Tier 1 capital (to risk-weighted assets): BK 10,172,206 11.69 3,914,554 4.50 TB 1,758,237 19.42 407,224 4.50 Leverage ratio (2) : BK 11,773,839 4.84 7,284,812 3.00 TB 1,911,237 5.55 1,031,484 3.00 At March 31, 2020: Total capital (to risk-weighted assets): BK ¥ 12,092,262 14.76 % ¥ 6,550,969 8.00 % TB 2,131,514 25.42 670,714 8.00 Tier 1 capital (to risk-weighted assets): BK 10,254,608 12.52 4,913,227 6.00 TB 1,867,723 22.27 503,035 6.00 Common Equity Tier 1 capital (to risk-weighted assets): BK 8,738,975 10.67 3,684,920 4.50 TB 1,686,723 20.11 377,276 4.50 Leverage ratio (2) : BK 10,254,608 4.02 7,644,928 3.00 TB 1,867,723 5.87 953,353 3.00 Notes: (1) Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and G-SIB G-SIB % as of March 31, 2019 and 2020, and the countercyclical buffer of 0.04% and % as of March 31, 2019 and 2020, respectively. (2) Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA. Mitsubishi UFJ Morgan Stanley Securities and other securities subsidiaries in Japan and overseas are also subject to regulatory capital requirements of the countries or jurisdictions in which they operate. In Japan, the Financial Instruments and Exchange Act and related ordinance require financial instruments firms to maintain a minimum capital ratio of 120% calculated as a percentage of capital accounts less certain fixed assets, as determined in accordance with Japanese GAAP, against amounts equivalent to market, counterparty credit and operational risks. Specific guidelines are issued as a ministerial ordinance which details the definition of essential components of the capital ratios, including capital, deductible fixed asset items and risks, and related measures. Failure to maintain a minimum capital ratio will trigger mandatory regulatory actions. A capital ratio of less than 140% will call for regulatory reporting and a capital ratio of less than 100% may lead to a suspension of all or part of the business for a period of time and cancellation of a registration. At March 31, 2019, Mitsubishi UFJ Morgan Stanley Securities’s capital accounts less certain fixed assets of ¥446,609 million on a stand-alone basis and ¥469,272 million on a consolidated basis, were 331.6% and 332.2% of the total amounts equivalent to market, counterparty credit and operational risks, respectively. At March 31, 2020, its capital accounts less certain fixed assets of ¥440,520 million on a stand-alone basis and ¥465,343 million on a consolidated basis, were 313.0% and 316.2% of the total amounts equivalent to market, counterparty credit and operational risks, respectively. Management believes, as of March 31, 2020, that MUFG, MUFG Bank, Mitsubishi UFJ Trust and Banking, Mitsubishi UFJ Morgan Stanley Securities and other regulated securities subsidiaries met all capital adequacy requirements to which they are subject. United States of America In the United States of America, MUFG Americas Holdings and its banking subsidiary MUFG Union Bank, N.A. (“MUFG Union Bank” or “BK(US)”), MUFG Bank’s largest subsidiaries operating outside Japan, are subject to various regulatory capital requirements administered by the U. S. Federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a material effect on MUFG Americas Holdings’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, MUFG Americas Holdings and MUFG Union Bank must meet specific capital guidelines that involve quantitative measures of MUFG Americas Holdings’s and MUFG Union Bank’s assets, liabilities, and certain off-balance Quantitative measures established by regulation to help ensure capital adequacy require MUFG Americas Holdings and MUFG Union Bank to maintain minimum amounts and ratios (set forth in the tables below) of Total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and of Tier 1 capital (as defined) to quarterly average assets (as defined). In July 2013, the Board of Governors of the Federal Reserve System and the other U.S. Federal banking agencies adopted final rules making significant changes to the U.S. regulatory capital framework for U.S. banking organizations (U.S. Basel III). The final rules are intended to conform this framework to the BCBS’ current international regulatory capital accord (Basel III). These rules replace the U.S. Federal banking agencies’ general risk-based capital rules (commonly known as “Basel I”), advanced approaches rules (commonly known as “Basel II”) that are applicable to certain large banking organizations (including MUFG Union Bank), and leverage rules, and are subject to certain transition provisions. Among other requirements, the U.S. Basel III rules revise the definition of capital, increase minimum capital ratios, and introduce a minimum Common Equity Tier 1 capital ratio of 4.5% and a capital conservation buffer of 2.5% (for a total minimum Common Equity Tier 1 capital ratio of 7.0%) and a potential countercyclical buffer of up to 2.5%, which would be imposed by regulators at their discretion if it is determined that a period of excessive credit growth is contributing to an increase in financial institution systemic risk; mandate a Tier 1 leverage ratio of 4% and introduce, for large and internationally active bank holding companies, a Tier 1 Supplementary Leverage Ratio that is currently set at 3% and which incorporates off-balance risk-weighted assets under U.S. Basel III; and eliminate, for advanced approaches institutions, over a four-year phase-in As a result of the Federal Reserve’s approval of MUFG Americas Holdings’s request to opt out of the advanced approaches methodology in the fourth quarter of 2014, MUFG Americas Holdings calculated its regulatory capital ratios under U.S. Basel I rules at December 31, 2014 and became subject to the U.S. Basel III standardized approach on January 1, 2015, with certain provisions subject to phase-in one-time off-balance 50 As required under U.S. Basel III rules, the 2.5% capital conservation buffer is being implemented on a phased-in four-year phased-in The figures on the table below are calculated according to U.S. Basel III as of December 31, 2018 and 2019. MUFG Americas Holdings’s actual capital amounts and ratios are presented as follows: Actual Minimum capital (1) Amount Ratio Amount Ratio (in millions, except percentages) MUAH: At December 31, 2018: Total capital (to risk-weighted assets) $ 14,904 14.60 % $ 10,081 9.875 % Tier 1 capital (to risk-weighted assets) 14,256 13.96 8,039 7.875 Tier 1 capital (to quarterly average assets) (2) 14,256 8.77 6,502 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 14,256 13.96 6,508 6.375 At December 31, 2019: Total capital (to risk-weighted assets) $ 15,769 14.73 % $ 11,237 10.500 % Tier 1 capital (to risk-weighted assets) 15,086 14.10 9,097 8.500 Tier 1 capital (to quarterly average assets) (2) 15,086 8.88 6,792 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 15,086 14.10 7,492 7.000 Notes: (1) The minimum capital requirement includes a capital conservation buffer of 1.875% at December 31, 2018 and 2.5% at December 31, 2019. (2) Excludes certain deductions. The figures on the table below are calculated according to U.S. Basel III as of December 31, 2018 and 2019. MUFG Union Bank’s actual capital amounts and ratios are presented as follows: Actual Minimum capital (1) Ratios OCC Amount Ratio Amount Ratio Amount Ratio (in millions, except percentages) BK(US): At December 31, 2018: Total capital (to risk-weighted assets) $ 13,905 15.09 % $ 9,102 9.875 % $ 9,217 10.00 % Tier 1 capital (to risk-weighted assets) 13,316 14.45 7,258 7.875 7,374 8.00 Tier 1 capital (to quarterly average assets) (2) 13,316 10.61 5,018 4.000 6,273 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 13,316 14.45 5,876 6.375 5,991 6.50 At December 31, 2019: Total capital (to risk-weighted assets) $ 14,746 15.11 % $ 10,244 10.500 % $ 9,756 10.00 % Tier 1 capital (to risk-weighted assets) 14,115 14.47 8,293 8.500 7,805 8.00 Tier 1 capital (to quarterly average assets) (2) 14,115 10.65 5,304 4.000 6,629 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 14,115 14.47 6,829 7.000 6,342 6.50 Notes: (1) Beginning January 1, 2018 and 2019, the minimum capital requirement includes a capital conservation buffer of 1.875% and 2.5%, respectively. (2) Excludes certain deductions. Management believes, as of December 31, 2019, that MUFG Americas Holdings and MUFG Union Bank met all capital adequacy requirements to which they are subject. As of December 31, 2018 and 2019, the notification from the OCC categorized MUFG Union Bank as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” MUFG Union Bank must maintain a minimum total risk-based capital ratio of 10% as of December 31, 2018 and 2019, a Tier 1 risk-based capital ratio of 8% as of December 31, 2018 and 2019, a Tier 1 capital to quarterly average assets of 5% as of December 31, 201 8 and 201 9 , and Common Equity Tier 1 risk-based capital ratio of 6.5% as of December 31, 2018 and 2019, as set forth in the table. There are no conditions or events since that notification that management believes have changed MUFG Union Bank’s category.

Earnings Per Common Share Appli

Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block]	12 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block]	2 2 EARNINGS PER COMMON SHARE APPLICABLE TO COMMON SHAREHOLDERS OF MUFG Reconciliations of net income and weighted average number of common shares outstanding used for the computation of basic EPS to the adjusted amounts for the computation of diluted EPS for the fiscal years ended March 31, 2018, 2019 and 2020 are as follows: 2018 2019 (in millions) Income (Numerator): Net income attributable to Mitsubishi UFJ Financial Group ¥ 1,228,160 ¥ 718,645 ¥ 305,955 Effect of dilutive instruments: Stock acquisition rights and restricted stock units—Morgan Stanley (3,826 ) (3,745 ) (2,861 ) Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions ¥ 1,224,334 ¥ 714,900 ¥ 303,094 2018 2019 2020 (thousands of shares) Shares (Denominator): Weighted average common shares outstanding 13,291,842 13,058,698 12,912,790 Effect of dilutive instruments: Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan (1) 1,650 484 166 Weighted average common shares for diluted computation 13,293,492 13,059,182 12,912,956 2018 2019 2020 (in yen) Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group: Basic earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group ¥ 92.40 ¥ 55.03 ¥ 23.69 Diluted earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (1) ¥ 92.10 ¥ 54.74 ¥ 23.47 Note: (1) For the fiscal years ended March 31, 2019 and 2020, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrument

Derivative Financial Instruments [Text Block]	12 Months Ended
Derivative Financial Instruments [Text Block]	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments [Text Block]	23. DERIVATIVE FINANCIAL INSTRUMENTS The MUFG Group uses various derivative financial instruments both for trading purposes and for purposes other than trading (primarily risk management purposes) in the normal course of business to meet Market risk is the possibility that future changes in market indices make the financial instruments less valuable. The MUFG Group is a party to derivative financial instruments, including swaps, forwards, options and other types of derivatives, dealing primarily with market risk associated with interest rates, foreign currencies, equity and commodity prices, and credit risk associated with counterparty’s nonperformance of transactions. Credit risk is the possibility that a loss may result from a counterparty’s failure to perform according to the terms and conditions of the contract, which may exceed the value of underlying collateral. To reduce credit risk, the MUFG Group may require collateral or guarantees based on a case-by-case Trading Activities The MUFG Group’s trading activities include dealing and customer accommodation activities. As part of its trading activities, the MUFG Group offers a variety of derivative financial instruments for managing interest rate and foreign exchange risk to its domestic and foreign corporate and financial institution customers. The MUFG Group also enters into other types of derivative transactions, including equity and credit-related contracts, for its own account. Risk Management Activities As part of the MUFG Group’s risk management activities, asset and liability management is viewed as one of the methods for the MUFG Group to manage its interest rate exposures on interest-bearing assets and liabilities. The MUFG Group uses certain derivative financial instruments in order to minimize significant unplanned fluctuations in earnings that are caused by interest rate volatility. For example, an increase or a decrease in interest income and interest expense on hedged variable rate assets and liabilities as a result of interest rate fluctuations are expected to be substantially offset by the variability in earnings by gains and losses on the derivative instruments that are linked to these hedged assets and liabilities. The MUFG Group enters into interest rate swaps and other contracts primarily to manage the interest rate risk of its loans, investment securities and deposit liabilities. Interest rate contracts, which are generally non-leveraged The MUFG Group enters into forward exchange contracts, currency swaps and other contracts in response to currency exposures resulting from on-balance Derivatives Designated as Hedges The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered mainly by MUFG Americas Holdings whose fiscal period ends on December 31. Cash Flow Hedges From time to time, MUFG Americas Holdings uses interest rate derivatives to hedge the risk of changes in cash flows attributable to changes in the designated interest rate on LIBOR indexed loans, and to a lesser extent, to hedge interest rate risk on rollover debt. MUFG Americas Holdings used interest rate derivatives with an aggregate notional amount of ¥1,457.1 billion at December 31, 2019 to hedge the risk of changes in cash flows attributable to changes in the designated interest rates from variable rate loans. MUFG Americas Holdings used interest rate derivatives with an aggregate notional amount of ¥7.6 billion at December 31, 2019 to hedge the risk of changes in cash flows attributable to changes in the designated interest rate on LIBOR indexed short-term borrowings. At December 31, 2019, the weighted average remaining life of the active cash flow hedges was 3.1 years. For cash flow hedges, changes in the fair value of the hedging instruments are reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged cash flows are recognized in net interest income. At December 31, 2019, MUFG Americas Holdings expects to reclassify approximately ¥7.3 billion of losses from Accumulated OCI as a reduction to net interest income during the twelve months ending December 31, 2020. This amount could differ from amounts actually realized due to changes in interest rates, hedge terminations and the addition of other hedges subsequent to December 31, 2019. Fair Value Hedges MUFG Americas Holdings engaged in an interest rate hedging strategy in which one or more interest rate derivatives were associated with a specified interest bearing liability, in order to convert the liability from a fixed rate to a floating rate instrument. This strategy mitigated the changes in fair value of the hedged liability caused by changes in the designated interest rate, LIBOR. For the fiscal year ended December 31, 2018, MUFG Americas Holdings recorded losses on the hedging instruments and gains on the hedged liability, both of which were less than ¥1 billion. For the fiscal year ended December 31, 2019, MUFG Americas Holdings did not have any fair value hedges. Notional Amounts of Derivative Contracts The following table summarizes the notional amounts of derivative contracts at March 31, 2019 and 2020: Notional amounts (1) 2019 2020 (in trillions) Interest rate contracts ¥ 1,409.6 ¥ 1,553.5 Foreign exchange contracts 230.5 230.2 Equity contracts 6.4 8.1 Commodity contracts 0.2 0.1 Credit derivatives 7.2 8.7 Other 3.0 3.1 Total ¥ 1,656.9 ¥ 1,803.7 Note: (1) Includes both written and purchased positions. Impact of Derivatives on the Consolidated Balance Sheets The following table summarizes fair value information on derivative instruments that are recorded on the MUFG Group’s consolidated balance sheets at March 31, 2019 and 2020: Fair value of derivative instruments 2019 (1)(5) 2020 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 10,108 ¥ 1 ¥ 10,109 ¥ 10,847 ¥ — ¥ 10,847 Foreign exchange contracts 2,795 — 2,795 3,734 — 3,734 Equity contracts 188 — 188 236 — 236 Commodity contracts 27 — 27 26 — 26 Credit derivatives 84 — 84 114 — 114 Other 2 — 2 1 — 1 Total derivative assets ¥ 13,204 ¥ 1 ¥ 13,205 ¥ 14,958 ¥ — ¥ 14,958 Derivative liabilities: Interest rate contracts ¥ 9,896 ¥ — ¥ 9,896 ¥ 10,205 ¥ — ¥ 10,205 Foreign exchange contracts 2,671 — 2,671 3,604 4 3,608 Equity contracts 183 — 183 277 — 277 Commodity contracts 27 — 27 26 — 26 Credit derivatives 69 — 69 95 — 95 Other (6) (136 ) — (136 ) (177 ) — (177 ) Total derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ 14,030 ¥ 4 ¥ 14,034 Notes: (1) The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts. (2) The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6). (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets. (4) This table does not include contracts with embedded derivatives for which the fair value option has been elected. (5) For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt. Impact of Derivatives on the Consolidated Statements of Income The following table provide s Gains and losses for trading and risk management derivatives (not designated as hedging instruments) Trading and risk management derivatives gains and losses 2018 2019 2020 Foreign Trading Total Foreign Trading Total Foreign Trading Total (in billions) Interest rate contracts ¥ — ¥ 51 ¥ 51 ¥ — ¥ 6 ¥ 6 ¥ — ¥ (173 ) ¥ (173 ) Foreign exchange contracts (163 ) — (163 ) (347 ) — (347 ) (429 ) — (429 ) Equity — (260 ) (260 ) — 80 80 — 30 30 Commodity contracts — 6 6 — — — — — — Credit derivatives — (2 ) (2 ) — (40 ) (40 ) — 15 15 Other 3 (22 ) (19 ) (7 ) (70 ) (77 ) (5 ) (31 ) (36 ) Total ¥ (160 ) ¥ (227 ) ¥ (387 ) ¥ (354 ) ¥ (24 ) ¥ (378 ) ¥ (434 ) ¥ (159 ) ¥ (593 ) Credit Derivatives The MUFG Group enters into credit derivatives to manage its credit risk exposure, to facilitate client transactions, and for proprietary trading purposes, under which they provide the counterparty protection against the risk of default on a set of debt obligations issued by a specified reference entity or entities. Types of such credit derivatives primarily include single name credit default swaps, index and basket credit default swaps. The MUFG Group will have to perform under a credit derivative if a credit event as defined under the contract occurs. Such credit events include bankruptcy, dissolution or insolvency of the referenced entity, default and restructuring of the obligations of the referenced entity. The MUFG Group’s counterparties are banks, broker-dealers, insurance and other financial institutions. The contractual or notional amounts of these credit derivatives represent the maximum potential amounts of future payments without consideration of possible recoveries under recourse provisions or from collateral held or pledged. The table below summarizes certain information regarding protection sold through credit derivatives as of March 31, 2019 and 2020: Protection sold Maximum potential/Notional amount Fair value At March 31, 2019: 1 year 1-5 Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 378,527 ¥ 1,603,962 ¥ 145,689 ¥ 2,128,178 ¥ (30,303 ) Non-investment 112,901 238,330 5,672 356,903 (127 ) Not rated — 5,097 — 5,097 (47 ) Total 491,428 1,847,389 151,361 2,490,178 (30,477 ) Index and basket credit default swaps held by BK: Investment grade (2) — 120,854 — 120,854 (82 ) Non-investment — 101,001 — 101,001 (2,010 ) Total — 221,855 — 221,855 (2,092 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 13,000 194,618 8,000 215,618 (3,853 ) Non-investment — — — — — Not rated 8,863 206,832 3,444 219,139 (3,043 ) Total 21,863 401,450 11,444 434,757 (6,896 ) Total index and basket credit default swaps sold 21,863 623,305 11,444 656,612 (8,988 ) Total credit default swaps sold 513,291 2,470,694 162,805 3,146,790 (39,465 ) Other credit derivatives sold (3) Investment grade 77,693 — — 77,693 (620 ) Total credit derivatives ¥ 590,984 ¥ 2,470,694 ¥ 162,805 ¥ 3,224,483 ¥ (40,085 ) Protection sold Maximum potential/Notional amount Fair value At March 31, 2020: 1 year 1-5 Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 303,870 ¥ 2,125,006 ¥ 494,040 ¥ 2,922,916 ¥ (63,855 ) Non-investment 93,671 279,892 49,681 423,244 3,358 Not rated 2,453 6,826 — 9,279 (18 ) Total 399,994 2,411,724 543,721 3,355,439 (60,515 ) Index and basket credit default swaps held by BK: Investment grade (2) — 28,296 — 28,296 (3 ) Non-investment — 99,035 — 99,035 (1,195 ) Total — 127,331 — 127,331 (1,198 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 20,000 182,306 14,950 217,256 (1,820 ) Non- investme nt grade — 7,595 — 7,595 (165 ) Not rated 28,296 190,398 5,316 224,010 (5,205 ) Total 48,296 380,299 20,266 448,861 (7,190 ) Total index and basket credit default swaps sold 48,296 507,630 20,266 576,192 (8,388 ) Total credit default swaps sold 448,290 2,919,354 563,987 3,931,631 (68,903 ) Other credit derivatives sold Investment grade — — — — — Total credit derivatives ¥ 448,290 ¥ 2,919,354 ¥ 563,987 ¥ 3,931,631 ¥ (68,903 ) Notes: (1) Fair value amounts are shown on a gross basis prior to cash collateral or counte r (2) The MUFG Group considers ratings of Baa3/BBB- (3) Other credit derivatives primarily consist of total return swaps. Single name credit default swaps Index and basket credit default swaps pro-rata The MUFG Group may economically hedge its exposure to credit derivatives by entering into offsetting derivative contracts. The carrying value and notional amounts of credit protection sold in which the MUFG Group held purchased protection with identical underlying referenced entities were approximately ¥35 billion and ¥2,687 billion, respectively, at March 31, 2019, and approximately ¥65 billion and ¥3,544 billion, respectively, at March 31, 2020. Collateral is held by the MUFG Group in relation to these instruments. Collateral requirements are determined at the counterparty level and cover numerous transactions and products as opposed to individual contracts. Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features Certain derivative instruments held by the MUFG Group contain provisions that require the MUFG Group’s debt to maintain an investment grade credit rating from each of the major credit rating agencies. If the MUFG Group’s debt were to fall below investment grade, it would be in violation of these provisions, and the counterparties to the derivative instruments could request payments on early termination or demand immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position at March 31, 2019 and 2020 was approximately ¥0.6 trillion and ¥0.6 trillion, respectively, for which the MUFG Group has posted collateral of approximately ¥85 billion and ¥152 billion, respectively, in the normal course of business. The amount of additional collateral and early termination amount which could be requested if the MUFG Group’s debt falls below investment grade was ¥84 billion and ¥56 billion, respectively, as of March 31, 2019 and ¥58 billion and ¥80 billion, respectively, as of March 31, 2020.

Obligations under Guarantees an

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block]	2 4 OBLIGATIONS UNDER GUARANTEES AND OTHER OFF-BALANCE Obligations under Guarantees The MUFG Group provides customers with a variety of guarantees and similar arrangements, including standby letters of credit, financial and performance guarantees, credit protection, liquidity facilities, other off-balance For certain types of derivatives, such as written interest rate options and written currency options, the maximum potential future payments are unlimited. Accordingly, it is impracticable to estimate the maximum potential amount of future payments. As such, the notional amounts of the related contracts, other than the maximum potential payments, are included in the table. The MUFG Group mitigates its credit risk exposure resulting from guarantees by utilizing various techniques, including collateralization in the form of cash, securities, and real estate properties based on management’s credit assessment of the guaranteed parties and the related credit profile. In order to manage the credit risk exposure, the MUFG Group also enters into sub-participation amounts summarized in the following table do not necessarily bear any direct relationship to the future actual credit exposure, primarily because of risk management techniques of the MUFG Group. Maximum Amount by expiration period At March 31, 2019: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 2,792 ¥ 838 ¥ 271 Performance guarantees 3,256 2,332 784 140 Derivative instruments (1) 58,025 29,734 20,921 7,370 Liabilities of trust accounts 11,520 5,884 420 5,216 Other 53 12 13 28 Total ¥ 76,755 ¥ 40,754 ¥ 22,976 ¥ 13,025 Maximum Amount by expiration period At March 31, 2020: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,109 ¥ 763 ¥ 226 Performance guarantees 3,058 2,160 738 160 Derivative instruments (1) 58,836 36,021 14,543 8,272 Liabilities of trust accounts 13,142 6,752 451 5,939 Other 88 8 73 7 Total ¥ 79,222 ¥ 48,050 ¥ 16,568 ¥ 14,604 Note: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation. Nature of Guarantee Contracts Standby letters of credit and financial guarantees generally include an obligation of an issuer or a designated third-party to guarantee the performance of the customer to the beneficiary under the terms of contracts such as lending contracts and other similar financial transactions. The MUFG Group is required to make payments to the guaranteed parties in the event that the customers fail to fulfill the obligations under the contracts. The guarantees whose contractual maturities are over 5 years are mainly comprised of guarantees of housing loans. Performance guarantees are contracts that contingently require the MUFG Group to make payments to the guaranteed party based on another party’s failure to perform under an obligating agreement, except financial obligation. For example, performance guarantees include guarantees of completion of construction projects. Derivative instruments that are deemed to be included within the definition of guarantees as prescribed in the guidance on guarantees include certain written options and credit default swaps. In order for the MUFG Group to determine if those derivative instruments meet the definition of guarantees, as prescribed in the guidance on guarantees, the MUFG Group has to track whether the counterparties are actually exposed to losses that will result from the adverse change in the underlyings. Accordingly, the MUFG Group has disclosed information on all credit default swaps and certain written options for which there is a possibility of meeting the definition of guarantees as prescribed in the guidance on guarantees, regardless of whether the counterparties have assets or liabilities related to the underlyings of the derivatives. However, credit derivatives sold by the MUFG Group at March 31, 2019 and 2020 are excluded from this presentation, as they are disclosed in Note 23. Liabilities of trust accounts represent the trustee’s potential responsibility for temporary payments to creditors of liabilities of trust accounts making use of funds of the MUFG Group, unless there are certain agreements with trust creditors that have provisions limiting the MUFG Group’s exposure as a trustee to the trust account assets. A trust may incur external liabilities to obtain certain services during the terms of the trust arrangement. While in principle, any liabilities of a trust are payable by the trust account and its beneficiaries. A trustee’s responsibility may be interpreted to encompass temporary payments for the trust account liabilities when the trust account does not maintain sufficient liquidity available for such liabilities unless the agreement with trust creditors limits the trustee’s exposure to the trust account assets. At March 31, 2019 and 2020, there were liabilities of ¥11,520 billion and ¥13,142 billion, respectively, in the segregated records of trust accounts including the amounts related to liabilities with provisions limiting trustee responsibility. Liabilities of trust accounts principally includes obligations to return collateral under security lending transactions. The MUFG Group has experienced no significant losses on such responsibilities and its exposure to the risk associated with the temporary payments is judged to be remote because trust account liabilities are generally covered by the corresponding trust account assets. The MUFG Group continuously monitors the liabilities of trust accounts and assesses the trust account’s ability to perform its obligations to prevent any unfavorable outcomes; the MUFG Group claims its recourse for its temporary payments against the trust account assets and the beneficiaries. Carrying Amount At March 31, 2019 and 2020, the carrying amounts of the liabilities related to guarantees and similar instruments set forth above were ¥1,051,297 million and ¥1,130,522 million, respectively, which are included in Other liabilities and Trading account liabilities. The guarantees and similar instruments comprising the largest components of the total were options sold in the amount of ¥1,005,951 million and ¥1,090,921 million as of March 31, 2019 and 2020, respectively. Credit derivatives sold by the MUFG Group at March 31, 2019 and 2020 are excluded from this presentation, as they are disclosed in Note 2 3 off-balance Performance Risk The MUFG Group monitors performance risk of its guarantees using the same credit rating system utilized for estimating probabilities of default with its loan portfolio. The MUFG Group’s credit rating system is consistent with both the method of evaluating credit risk under Basel III and those of third-party credit rating agencies. On certain underlying referenced credits or entities, ratings are not available. Such referenced credits are included in the “Not rated” category in the following tables. Presented in the tables below is the maximum potential amount of future payments classified based upon internal credit ratings as of March 31, 2019 and 2020. The determination of the maximum potential future payments is based on the notional amount of the guarantees without consideration of possible recoveries under recourse provisions or from collateral held or pledged. Such amounts do not represent the anticipated losses, if any, on these guarantees. Amount by borrower grade At March 31, 2019: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 3,779 ¥ 98 ¥ 21 ¥ 3 Performance guarantees 3,256 3,070 79 78 29 Total ¥ 7,157 ¥ 6,849 ¥ 177 ¥ 99 ¥ 32 Amount by borrower grade At March 31, 2020: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,984 ¥ 93 ¥ 17 ¥ 4 Performance guarantees 3,058 2,904 96 36 22 Total ¥ 7,156 ¥ 6,888 ¥ 189 ¥ 53 ¥ 26 Notes: (1) Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. (2) Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, The guarantees the MUFG Group does not classify based upon internal credit ratings are as follows. The MUFG Group records all derivative contracts at fair value. Aggregate market risk limits have been established, and market risk measures are routinely monitored against these limits. The MUFG Group also manages its exposure to these derivative contracts through a variety of risk mitigation strategies, including, but not limited to, offsetting economic hedge positions. The MUFG Group expects the risk of loss to be remote and believes that the notional amounts of the derivative contracts generally exceed its exposure. Liabilities of trust accounts represent the trustee’s potential responsibility for temporary payments to creditors of liabilities of trust accounts using funds of the MUFG Group. The MUFG Group has experienced no significant losses on such responsibilities and its exposure to the risk associated with the temporary payments is judged to be remote because trust account liabilities are generally covered by the corresponding trust account assets. Other Off-balance In addition to obligations under guarantees and similar arrangements set forth above, the MUFG Group issues other off-balance off-balance off-balance 2019 2020 (in billions) Commitments to extend credit ¥ 77,273 ¥ 76,398 Commercial letters of credit 1,057 757 Commitments to make investments 240 247 Other 5 5 Commitments to extend credit, which generally have fixed expiration dates or other termination clauses, are binding agreements to lend to customers. Commitments are different from guarantees in that the commitments are generally revocable or have provisions that enable the MUFG Group to avoid payments in the event of violations of any conditions of the contracts and certain deterioration of the potential borrowers’ financial condition. Commercial letters of credit, generally used for trade transactions, are typically secured by the underlying goods. The MUFG Group continually monitors the type and amount of collateral and other securities, and requires counterparties to provide additional collateral or guarantors as necessary. Commitments to make investments are legally binding contracts to make additional contributions to corporate recovery or private equity investment funds in accordance with limited partnership agreements. Some of these funds, in which the MUFG Group has significant variable interests, are described in Note 2 5

Variable Interest Entities _Tex

Variable Interest Entities [Text Block]	12 Months Ended
Variable Interest Entities [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Variable Interest Entities [Text Block]	2 5 VARIABLE INTEREST ENTITIES In the normal course of business, the MUFG Group has financial interests and other contractual obligations in various entities which may be deemed to be VIEs such as asset-backed conduits, various investment funds, special purpose entities created for structured financing, repackaged instruments, entities created for the securitization of the MUFG Group’s assets and trust arrangements. The following tables present the assets and liabilities of consolidated VIEs recorded on the accompanying consolidated balance sheets at March 31, 2019 and 2020: Consolidated VIEs Consolidated assets At March 31, 2019: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,698,146 ¥ 92,310 ¥ 26,101 ¥ 3,005 ¥ 1,424,444 ¥ 5,124,462 ¥ 27,824 Investment funds 680,922 — 14,113 477,239 18,118 — 171,452 Special purpose entities created for structured financing 203,458 — 2,214 — — 127,243 74,001 Repackaged instruments 279,327 506 — 53,346 137,509 86,753 1,213 Securitization of the MUFG Group’s assets 10,208,496 — — — — 10,183,624 24,872 Trust arrangements 7,888,210 — 8,953 202 311,412 7,565,862 1,781 Other 34,303 362 1,635 — 42 9,699 22,565 Total consolidated assets before elimination 25,992,862 93,178 53,016 533,792 1,891,525 23,097,643 323,708 The amounts eliminated in consolidation (7,772,776 ) (93,171 ) (29,361 ) (5,102 ) (63,331 ) (7,552,315 ) (29,496 ) Total consolidated assets ¥ 18,220,086 ¥ 7 ¥ 23,655 ¥ 528,690 ¥ 1,828,194 ¥ 15,545,328 ¥ 294,212 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,691,362 ¥ — ¥ 4,678,588 ¥ 1,552,572 ¥ 460,202 Investment funds 6,852 — — 5,158 1,694 Special purpose entities created for structured financing 114,469 — 609 111,523 2,337 Repackaged instruments 277,179 — 48,014 174,215 54,950 Securitization of the MUFG Group’s assets 10,167,632 — — 10,162,231 5,401 Trust arrangements 7,881,332 7,616,575 — — 264,757 Other 32,584 — 8,611 1,474 22,499 Total consolidated liabilities before elimination 25,171,410 7,616,575 4,735,822 12,007,173 811,840 The amounts eliminated in consolidation (14,676,389 ) (50,396 ) (2,996,041 ) (11,517,019 ) (112,933 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,922,307 ) (7,566,179 ) (1,719,246 ) (121 ) (636,761 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 572,714 ¥ — ¥ 20,535 ¥ 490,033 ¥ 62,146 Consolidated VIEs Consolidated assets At March 31, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,263,082 ¥ 102,781 ¥ 31,625 ¥ 12,989 ¥ 1,195,283 ¥ 4,913,939 ¥ 6,465 Investment funds 493,757 — 16,482 314,074 34,121 — 129,080 Special purpose entities created for structured financing 204,047 — 2,658 — — 119,348 82,041 Repackaged instruments 249,529 1,330 — 42,052 118,776 86,859 512 Securitization of the MUFG Group’s assets 10,956,261 — — — — 10,933,580 22,681 Trust arrangements 7,527,539 — 654 336,546 745,846 6,441,864 2,629 Other 31,295 350 2,055 — — 6,885 22,005 Total consolidated assets before elimination 25,725,510 104,461 53,474 705,661 2,094,026 22,502,475 265,413 The amounts eliminated in consolidation (6,877,849 ) (103,615 ) (23,427 ) (10,592 ) (289,567 ) (6,429,880 ) (20,768 ) Total consolidated assets ¥ 18,847,661 ¥ 846 ¥ 30,047 ¥ 695,069 ¥ 1,804,459 ¥ 16,072,595 ¥ 244,645 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,253,318 ¥ — ¥ 4,327,685 ¥ 1,478,921 ¥ 446,712 Investment funds 15,817 — — 5,546 10,271 Special purpose entities created for structured financing 114,357 — — 112,474 1,883 Repackaged instruments 251,056 — 65,965 163,833 21,258 Securitization of the MUFG Group’s assets 10,924,830 — 16,008 10,077,839 830,983 Trust arrangements 7,522,190 6,743,261 — — 778,929 Other 27,302 — 5,989 1,321 19,992 Total consolidated liabilities before elimination 25,108,870 6,743,261 4,415,647 11,839,934 2,110,028 The amounts eliminated in consolidation (15,045,398 ) (703 ) (2,526,893 ) (11,374,581 ) (1,143,221 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,465,320 ) (6,742,558 ) (1,857,923 ) (1 ) (864,838 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 598,152 ¥ — ¥ 30,831 ¥ 465,352 ¥ 101,969 In general, the creditors or beneficial interest holders of consolidated VIEs have recourse not only to the assets of those VIEs of which they are creditors or beneficial interest holders, but also to other assets of the MUFG Group, since the MUFG Group is also contractually required to provide credit enhancement or program-wide liquidity to these VIEs. The following tables present the total assets of non-consolidated non-consolidated non-consolidated Non-consolidated On-balance On-balance At March 31, 2019: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 29,621,609 ¥ 6,221,274 ¥ 4,982,357 ¥ 659 ¥ 1,704,553 ¥ 3,277,145 ¥ — ¥ — ¥ — Investment funds 67,750,419 1,952,676 1,753,823 187,166 1,253,705 304,310 8,642 206 206 Special purpose entities created for structured financing 42,676,571 3,972,450 3,015,593 252,597 48,895 2,709,008 5,093 9,827 9,827 Repackaged instruments 12,885,367 3,477,545 3,383,161 690,305 2,169,798 478,252 44,806 6,087 6,087 Other 60,074,743 3,482,153 2,454,807 123,595 65,451 2,145,665 120,096 57,567 57,567 Total ¥ 213,008,709 ¥ 19,106,098 ¥ 15,589,741 ¥ 1,254,322 ¥ 5,242,402 ¥ 8,914,380 ¥ 178,637 ¥ 73,687 ¥ 73,687 Non-consolidated On-balance On-balance At March 31, 2020: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 27,700,099 ¥ 5,836,895 ¥ 4,797,551 ¥ 190 ¥ 1,737,979 ¥ 3,059,382 ¥ — ¥ — ¥ — Investment funds 55,644,434 1,918,403 1,712,037 437,858 525,022 724,253 24,904 356,679 356,679 Special purpose entities created for structured financing 37,026,192 3,601,834 2,764,156 392,588 35,774 2,317,128 18,666 6,058 6,058 Repackaged instruments 8,215,327 3,030,263 2,931,617 394,478 2,123,058 361,184 52,897 — — Other 54,962,702 2,940,349 2,314,142 191,646 — 1,995,985 126,511 41,693 41,693 Total ¥ 183,548,754 ¥ 17,327,744 ¥ 14,519,503 ¥ 1,416,760 ¥ 4,421,833 ¥ 8,457,932 ¥ 222,978 ¥ 404,430 ¥ 404,430 Maximum exposure to loss on each type of entity is determined based on the carrying amount of any on-balance off-balance on-balance Asset-Backed Conduits This category primarily comprises the following: Multi-Seller Conduits (MUFG-sponsored Asset-Backed Commercial Paper (“ABCP”) Conduits and Other ABCP Conduits) The MUFG Group administers several conduits under asset-backed financing programs under which the conduits purchase financial assets, primarily trade accounts receivable, from the MUFG Group’s customers by issuing short-term financing instruments, primarily commercial paper, to third-party investors. Under the asset-backed financing programs, the MUFG Group acts as an agent for the conduits, which enter into agreements with the MUFG Group’s customers where the customers transfer financial assets to the conduits in exchange for monetary consideration. The MUFG Group also underwrites commercial paper for the conduits that is secured by the assets held by them and provides program-wide liquidity and credit enhancement facilities to the conduits. The MUFG Group receives fees related to the services it provides to the conduits and the program-wide liquidity and credit enhancement. The MUFG Group considers itself to be the primary beneficiary of the multi-seller conduits because, as an agent and sponsor, the MUFG Group has the power to direct activities of the conduits that most significantly impact the conduits’ economic performance and also has the obligation to absorb losses of the conduits that could potentially be significant to the conduits through the program-wide liquidity and credit enhancement. Consequently, the MUFG Group consolidates the conduits. In addition to the entities described above, the MUFG Group participates as a provider of financing to several conduits that are administered by third parties. Most of these conduits are established under a multi-seller asset-backed financing program and the MUFG Group provides financing along with other financial institutions. With respect to these conduits, the MUFG Group is not considered as the primary beneficiary because the MUFG Group’s participation in the conduits is only to provide financing along with other third-party financial institutions and it does not have the power to direct the activities of the conduits. Consequently, the MUFG Group does not consolidate the conduits. Asset-Backed Conduits (MUFG-sponsored Asset-Backed Loan (“ABL”) Programs and Other Programs) The MUFG Group administers several conduits under asset-backed financing programs where the MUFG Group provides financing to fund the conduits’ purchases of financial assets, comprising primarily trade accounts receivable, from its customers. The MUFG Group acts as an agent and sponsor for the conduits, which enter into agreements with the MUFG Group’s customers where the customers transfer assets to the conduits in exchange for monetary consideration. In most cases, the MUFG Group is the sole provider of financing that is secured by the assets held by the conduits. The MUFG Group considers itself to be the primary beneficiary of the conduits because, as an agent and sponsor for the conduits, the MUFG Group has the power to direct activities of the conduits, such as selection of the assets to be purchased and condition for purchases, and debt collection from the original obligors, that most significantly impact the conduits’ economic performance, and also has the obligation to absorb losses of the conduits that could potentially be significant to the conduits through financing it provides. Consequently, the MUFG Group consolidates the conduits. In addition, the MUFG Group is involved with entities, which take in most cases the form of a trust, where originators of financial assets, which primarily comprise lease receivables, entrust the assets with trust banks and receive beneficial certificates of trusts in exchange. The originators then transfer the beneficiary certificates to the MUFG Group in exchange for cash. The originators of the financial assets entrusted continue to be involved in the assets as servicers. Because the originators are deemed to have the power to direct activities of the entities that most significantly impact the entities’ economic performance through their role as a servicer, the MUFG Group is not considered as the primary beneficiary of these entities. Consequently, the MUFG Group does not consolidate these entities. The MUFG Group also participates as a provider of financing to the ABL programs that are managed by third parties. The MUFG Group is not considered as the primary beneficiary of the entities used in these programs as the MUFG Group’s participation in the entities is only to provide financing along with other third parties and it does not have the power to direct the activities of the entities. Consequently, the MUFG Group does not consolidate the entities used in these programs. Investment Funds This category primarily comprises the following: Corporate Recovery Funds These entities are established by fund managers, which are unrelated to the MUFG Group, for the purpose of investing in debt or equity instruments issued by distressed companies. After investment, the fund managers work closely with the management of the entities and attempt to enhance corporate value by various means including corporate restructuring and reorganization. Their exit strategies include, among others, sales to others and initial public offerings. Typically, these entities take the form of a limited partnership which is entirely funded by general and limited partner interests. These partnerships are considered as VIEs unless the limited partners hold substantive kick-out The MUFG Group mostly serves as a limited partner in corporate recovery funds that are considered as VIEs, and does not have the power to direct the activities of these funds that most significantly impact the economic performance of these funds. Therefore, the MUFG Group does not consider itself to be the primary beneficiary of these funds and does not consolidate them. Private Equity Funds The MUFG Group is involved in venture capital funds that are established by either the MUFG Group’s entities or fund managers unrelated to the MUFG Group. These entities have specific investment objectives in connection with their acquisition of equity interests, such as providing financing and other support to start-up These entities typically take the form of a limited partnership and usually are entirely funded by general and limited partner interests. These partnerships are considered as VIEs unless the limited partners hold substantive kick-out The MUFG Group participates in these partnerships as a general partner or limited partner. The MUFG Group consolidates these funds, which are considered as VIEs, if the MUFG Group has the power to direct the activities of these funds that most significantly impact the economic performance of these funds, and also has the obligation to absorb losses of these funds that could potentially be significant to these funds or the right to receive benefits from these funds that could potentially be significant to these funds. Investment Trusts The MUFG Group invests in investment trusts that are professionally managed collective investment schemes which pool money from many investors and invest in, among others, equity and debt securities. Most of these funds take the form of a trust where there is a separation in investment decisions, which is assumed by an investment manager who has no investment in a trust, and ownership through beneficiary interests issued by a trust are owned by investors. Therefore, these investment trusts are considered as VIEs. The MUFG Group consolidates these funds if the MUFG Group has the power to direct the activities of these funds that most significantly impact the economic performance of these funds, and also has the obligation to absorb losses of these funds that could potentially be significant to these funds or the right to receive benefits from these funds that could potentially be significant to these funds. Buy-out The MUFG Group provides financing to buy-out buy-out buy-out buy-out non-investment Other Investment Funds The MUFG Group’s investments in VIEs through MUFG Americas Holdings primarily consist of equity investments in low-income LIHC Unguaranteed Syndicated Investment Funds MUFG Americas Holdings creates the investment funds, serves as the managing investor member, and sells limited investor member interests to third parties. MUFG Americas Holdings receives benefits through income from the structuring of these funds, servicing fees for managing the funds and, as an investor member, tax benefits and tax credits to reduce the MUFG Americas Holdings tax liability. MUFG Americas Holdings considers itself to be the primary beneficiary and consolidates them upon adoption of the current guidance because, as a sponsor and managing member of the funds, it has the power to direct activities that most significantly impact the funds’ economic performance and also has the obligation to absorb losses of the funds that could potentially be significant to the funds. LIHC Guaranteed Syndicated Investment Funds MUFG Americas Holdings also forms limited liability companies, which in turn invest in LIHC operating partnerships, to create LIHC guaranteed syndicated investment funds. Interests in these funds are sold to third parties who pay a premium for a guaranteed return. MUFG Americas Holdings earns structuring fees from the sale of these funds and asset management fees. MUFG Americas Holdings serves as the funds’ sponsor and non-member Special Purpose Entities Created for Structured Financing This category primarily comprises the following: Leasing Transaction Vehicles These entities are established to raise funds to purchase or build equipment and machinery including, among others, commercial vessels, passenger and cargo aircraft, and production equipment for the purpose of leasing them to lessees who use the equipment and machinery as part of their business operations. These entities typically take the form of a limited partnership or a special purpose company where they fund their purchases of equipment and machinery via senior and subordinate financing. When entities take the form of a limited partnership, these entities are considered as VIEs unless limited partners hold substantive kick-out Project Financing Vehicles These entities are established to raise funds in connection with, among others, production of natural resources, construction and development of urban infrastructure (including power plants and grids, highways and ports), and the development of real estate properties or complexes. These projects typically involve special purpose companies which issue senior and subordinate financing to raise funds in connection with the various projects. The subordinate financing is usually provided by parties that will ultimately make use of the assets constructed or developed. By contrast, the senior financing is typically provided by financial institutions, including the MUFG Group. Because the MUFG Group’s participation in these entities is only to provide financing, it does not have the power to direct the activities that most significantly impact the economic performance of these entities. Therefore, the MUFG Group is not considered as the primary beneficiary of these entities and does not consolidate them. Sale-and-Leaseback The MUFG Group is involved with vehicles that acquire assets, primarily real estate, from the MUFG Group’s customers and other unrelated parties where the sellers of the assets continue to use the assets through leaseback agreements. These vehicles typically take the form of a limited partnership, and are considered as VIEs unless the limited partners hold substantive kick-out Securitization of Client Real Estate Properties These entities are established for the purpose of securitizing real estate properties held by the MUFG Group’s customers. In most cases, these entities take the form of a limited partnership or a special purpose kick-out Repackaged Instruments This category primarily comprises the following: Investments in Financially-Engineered Products The MUFG Group is involved in special purpose entities that have been established to issue financial products through the engineering and repackaging of existing financial instruments such as collateralized debt obligations ( “ ” In certain instances, special purpose entities have been established and are managed by the MUFG Group. The MUFG Group’s involvement includes establishing and arranging the transaction and underwriting securities issued by the entities to general investors. For these entities, the MUFG Group has the power to direct activities that most significantly impact the economic performance and it has the obligation to absorb losses or receive benefits that could potentially be significant to the entities. As such, the MUFG Group considers itself as the primary beneficiary of these entities and consolidates them. Investments in Securitized Financial Instruments The MUFG Group holds investments in special purpose entities that issue securitized financial products. The assets held by the entities include credit card receivables and residential mortgage loans. These entities are established and managed by parties that are unrelated to the MUFG Group and the MUFG Group’s involvement with these entities is for its own investment purposes. In all cases, the MUFG Group participates as one of many other investors and the MUFG Group does not have the power to direct activities of the entities that most significantly impact the entities’ economic performance. Therefore, the MUFG Group is not considered as the primary beneficiary of these entities and does not consolidate them. Securitization of the MUFG Group’s Assets This category primarily comprises the following: Securitization for issuing interests or financing The MUFG Group establishes entities to securitize its own financial assets that include, among others, corporate and retail loans and lease receivables. The entities used for securitization, which typically take the form of a special purpose company or a trust, are established by the MUFG Group and, in most cases, issue senior and subordinate interests or financing. After securitization, the MUFG Group typically continues to service securitized assets as a servicer. The MUFG Group may also retain subordinate interests or financing or other interests. The MUFG Group is considered as the primary beneficiary and consolidates the entities used for securitization since it has the obligation to absorb losses through subordinate interests, and also has the power for determining and implementing policies as servicer that give it the ability to manage the entities’ assets that become delinquent or are in default in order to improve the economic performance of the entities. Eligible beneficiary interests in housing loan trusts The MUFG Group establishes trusts, which acquire the MUFG Group’s housing loans and in turn issue beneficiary interests to the MUFG Group, to pledge these beneficiary interests as collateral for borrowings from the Bank of Japan, as a result of the decision by the Bank of Japan on June 30, 2016 to accept these beneficial interests as collateral in the same way as it does for Japanese national government bonds. The MUFG Group is considered as the primary beneficiary and consolidates the trusts since it has the obligation to absorb losses through beneficiary interests, and also has the power for determining and implementing policies as servicer that give it the ability to manage housing loans owned by the trusts that become delinquent or are in default in order to improve the economic performance of the trusts. Trust Arrangements The MUFG Group offers, primarily through Mitsubishi UFJ Trust and Banking, a variety of trust products and services including securities investment trusts, pension trusts and trusts used as securitization vehicles. In a typical trust arrangement, however, the MUFG Group manages and administers assets on behalf of the customers in an agency, fiduciary and trust capacity and does not assume risks associated with the entrusted assets. The trusts are generally considered as VIEs because the trust beneficiaries, who provide all of the equity at risk, usually do not have power to direct the activities that most significantly impact its economic performance in the arrangements. The MUFG Group, however, is not considered as the primary beneficiary, mainly, except for the case mentioned below, because it merely receives fees for compensation for its services on terms that are customary for these activities and the fees are insignificant relative to the total amount of the trusts’ economic performance and variability. Therefore, the MUFG Group does not consolidate these entities. With respect to the jointly operated designated money in trusts, Mitsubishi UFJ Trust and Banking pools money from investors and determines how best to invest it. In addition, certain investors, such as money reserve funds and investment funds, place excess funds in the jointly operated designated money trusts. Mitsubishi UFJ Trust and Banking typically invests in high-quality financial assets, including government bonds, corporate bonds and corporate loans including loans to Mitsubishi UFJ Trust and Banking and receives fees as compensation for services. In this role as a sponsor of these trusts’ Mitsubishi UFJ Trust and Banking provides guarantees under which it is required to compensate a loss on the stated principal of the trust beneficial interests. Mitsubishi UFJ Trust and Banking is considered as the primary beneficiary of these trusts’ because it is exposed to a potentially significant amount of losses and also has the power to direct activities of these trusts’ that most significantly impact their economic performance. Upon consolidation of the trusts, the certificates issued to the investors are accounted for as deposit liabilities as the products are structured and marketed to customers similar to Mitsubishi UFJ Trust and Banking’s term deposit products. Mitsubishi UFJ Trust and Banking considers the likelihood of incurring losses on the stated principal guarantee to be highly remote. In the trusts’ operational history that extends over decades, the stated principal guarantee has never been called upon. The variability in fair value of the net assets of the trusts has been primarily affected by the fluctuations in interest rates, and the majority of such variability has been absorbed by investors or trust beneficiaries. Other This category primarily comprises the following: Financing Vehicles of the MUFG Group’s Customers The MUFG Group is involved with several entities that are established by the MUFG Group’s customers. These entities borrow funds from financial institutions and extend loans to their group entities. These entities effectively work as fund-raising vehicles for their respective group entities and enable the groups to achieve efficient financing by integrating their financing activities into a single entity. In all cases, the MUFG Group is not considered as the primary beneficiary because the MUFG Group’s participation in these entities is only to provide financing, and the customers effectively hold the power to direct activities of these entities that most significantly impact the economic performance of the entities. Consequently, the MUFG Group does not consolidate these entities. Funding Vehicles The MUFG Group has established several wholly-owned off-shore Troubled Borrowers During the normal course of business, the borrowers from the MUFG Group may experience financial difficulties and sometimes enter into certain transactions that require the MUFG Group to assess whether they would be considered as VIEs due to their difficult financial position. While in most cases such borrowers are not considered as VIEs when the transactions take place, in limited circumstances they are considered as VIEs due to insufficient equity investment at risk. In all cases, the MUFG Group is not considered as the primary beneficiary because the power to direct activities that most significantly impact the economic performance of the troubled borrowers resides with the management of the troubled borrowers, and the MUFG Group, as a lender, does not have power over or assume any role in management. Therefore, the MUFG Group does not consolidate these troubled borrowers.

Commitments and Contingent Liab

Commitments and Contingent Liabilities [Text Block]	12 Months Ended
Commitments and Contingent Liabilities [Text Block]	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities [Text Block]	26. COMMITMENTS AND CONTINGENT LIABILITIES Repayment of Excess Interest The MUFG Group maintains an allowance for repayment of excess interest based on an analysis of past experience of reimbursement of excess interest, borrowers’ profile, recent trend of borrowers’ claims for reimbursement, and management future forecasts. Management believes that the provision for repayment of excess interest is adequate and the allowance is at the appropriate amount to absorb probable losses, so that the impact of future claims for reimbursement of excess interest will not have a material adverse effect on the MUFG Group’s financial position and results of operations. The allowance for repayment of excess interest established by MUFG’s consumer finance subsidiaries, which was included in Other liabilities, was ¥24,983 million and ¥29,438 million as of March 31, 2019 and 2020, respectively. Provision (reversal) related to the allowance is included in Other non-interest Litigation In the ordinary course of business, the MUFG Group is subject to various litigation and regulatory matters. In accordance with applicable accounting guidance, the MUFG Group establishes an accrued liability for loss contingencies arising from litigation and regulatory matters when they are determined to be probable in their occurrence and the probable loss amount can be reasonably estimated. Based upon current knowledge and consultation with counsel, management believes the eventual outcome of such litigation and regulatory matters, where losses are probable and the probable loss amounts can be reasonably estimated, would not have a material adverse effect on the MUFG Group’s financial position, results of operations or cash flows. Additionally, management believes the amount of loss that is reasonably possible, but not probable, from various litigation and regulatory matters is not material to the MUFG Group’s financial position, results of operations or cash flows.

Fees and Commissions Income _Te

Fees and Commissions Income [Text Block]	12 Months Ended
Fees and Commissions Income [Text Block]	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Fees and Commissions Income [Text Block]	2 7 FEES AND COMMISSIONS INCOME Disaggregation of Contract Revenue Details of fees and commissions income for the fiscal years ended March 31, 2018, 2019 and 2020 were as follows: 2018 2019 2020 (in millions) Fees and commissions on deposits ¥ 53,483 ¥ 52,624 ¥ 53,684 Fees and commissions on remittances and transfers 169,300 168,756 169,407 Fees and commissions on foreign trading business 78,239 73,176 66,025 Fees and commissions on credit card business 212,515 225,877 238,112 Fees and commissions on security-related services 258,728 233,448 221,494 Fees and commissions on administration and management services for investment funds 159,481 147,597 184,559 Trust fees 112,399 115,002 119,919 Guarantee fees (1) 44,160 44,962 46,322 Insurance commissions 49,223 46,918 44,415 Fees and commissions on real estate business 40,573 45,160 49,764 Other fees and commissions (2) 284,691 285,058 308,351 Total ¥ 1,462,792 ¥ 1,438,578 ¥ 1,502,052 Notes: (1) Guarantee fees are not within the scope of the guidance on revenue from contracts with customers. (2) Other fees and commissions include non-refundable The following is an explanation of the relationship with revenue information disclosed for each reportable segment. These revenues from contracts with customers are related to various reportable segments disclosed in Note 29 29 The majority of fees and commissions on deposits are from the business activities relevant to Retail & Commercial Banking Business Group (“R&C”), with Global Commercial Banking Business Group (“GCB”) providing a smaller impact. The business activities relevant to fees and commissions on remittances and transfers are attributable to R&C, Japanese Corporate Investment Banking Business Group (“JCIB”), Global Corporate Investment Banking Business Group (“GCIB”), and GCB with no significant concentration in any particular segments. The business activities relevant to fees and commissions on foreign trading business are attributable to R&C, JCIB, GCIB, and GCB with no significant concentration in any particular segments. The business activities relevant to fees and commissions on credit card business are substantially attributable to R&C. The majority of fees and commissions on security-related services are from the business activities relevant to R&C, with JCIB and GCIB providing a smaller impact. The business activities relevant to fees and commissions on administration and management services for investment funds are substantially attributable to Asset Management & Investor Service Business Group (“AM/IS”). The business activities relevant to trust fees are attributable to R&C, JCIB, and AM/IS with no significant concentration in any particular segments. The majority of insurance commissions are from the business activities relevant to R&C, with GCB providing a smaller impact. The business activities relevant to fees and commissions on real estate business are attributable to R&C and JCIB with no significant concentration in any particular segments. Contract Balances Contract balances are recognized in the consolidated balance sheets in accordance with the definition of receivables and contract liabilities specified in the guidance on revenue from contracts with customers. Receivables include receivables for which the services are completed, and accrued income which represents the amount of consideration unpaid for the performance obligations that have been fulfilled pursuant to certain contracts under which the services are continuously provided. Contract liabilities include unearned revenue which represents the amount of consideration received for the performance obligations that have not been fulfilled pursuant to certain contracts under which the services are continuously provided. As of March 31, 2019 and 2020, receivables from contracts with customers of ¥185 billion and ¥192 billion, respectively, were included primarily in Other assets. As of March 31, 2019 and 2020, contract liabilities of ¥8 billion and ¥25 billion, respectively, were included in Other liabilities. Among the balance of contract liabilities as of March 31, 2020, ¥12 billion is a remaining performance obligation related to an insurance agency service which a certain subsidiary of the MUFG Group entered into as a single performance obligation to be satisfied as the service is rendered over the next 20 years.

Trading Account Profits and Los

Trading Account Profits and Losses [Text Block]	12 Months Ended
Trading Account Profits and Losses [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Trading Account Profits and Losses [Text Block]	2 8 TRADING ACCOUNT PROFITS AND LOSSES The MUFG Group performs trading activities through market-making, sales and arbitrage, while maintaining risk levels within appropriate limits in accordance with its risk management policy. The MUFG Group has trading account securities and trading derivative assets and liabilities for this purpose. In addition, the trading account securities include foreign currency-denominated debt securities such as foreign government or official institution bonds, corporate bonds and mortgage-backed securities, which are mainly comprised of securities measured at fair value under the fair value option. Net trading gains (losses) for the fiscal years ended March 31, 2018, 2019 and 2020 were comprised of the following: 2018 2019 (in millions) Interest rate and other derivative contracts ¥ (226,788 ) ¥ (24,031 ) ¥ (159,045 ) Trading account securities, excluding derivatives 153,674 192,931 924,418 Trading account profits (losses)—net (73,114 ) 168,900 765,373 Foreign exchange derivative contracts (1) (159,986 ) (354,401 ) (434,052 ) Net trading gains ( ) ¥ (233,100 ) ¥ (185,501 ) ¥ 331,321 Note: (1) Losses on foreign exchange derivative contracts are included in Foreign exchange losses—net in the accompanying consolidated statements of income. Foreign exchange losses—net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange gains For further information on the methodologies and assumptions used to estimate fair value, see Note 3 1 3

Business Segments _Text Block_

Business Segments [Text Block]	12 Months Ended
Business Segments [Text Block]	Mar. 31, 2020
Segment Reporting [Abstract]
Business Segments [Text Block]	29 BUSINESS SEGMENTS The reportable segments of the MUFG Group are subject to the periodical review by the Executive Committee, which represents the MUFG Group’s chief operating decision maker, to determine the allocation of management resources and assess performance. The MUFG Group has established its business units according to the characteristics of customers and the nature of the underlying business. Each business unit engages in business activities based on comprehensive strategies developed for and aimed at respective targeted customers and businesses. The business segment information is primarily based on the financial information prepared in accordance with accounting principles generally accepted in Japan as adjusted in accordance with internal management accounting rules and practices. Accordingly, the format and information are not consistent with the accompanying consolidated financial statements prepared on the basis of U.S. GAAP. A reconciliation is provided for the total amounts of segments’ operating profit with income before income tax expense under U.S. GAAP. See Note 30 for financial information relating to the MUFG Group’s operations by geographic area. The geographic financial information is consistent with the basis of the accompanying consolidated financial statements. Effective April 1, 2018, the MUFG Group reorganized its business groups in an effort to further integrate the expertise and capabilities of its consolidated subsidiaries to respond to the needs of customers more effectively and efficiently, as part of its current medium-term business plan. To make and execute unified group-wide strategies based on customer characteristics and the nature of business, the MUFG Group integrated the operations of its consolidated subsidiaries into six business segments.—Retail & Commercial Banking, Japanese Corporate & Investment Banking, Global Corporate & Investment Banking, Global Commercial Banking, Asset Management & Investor Services, and Global Markets. The following is a brief explanation of the MUFG Group’s business segments: Retail & Commercial Banking Business Group UFJ NICOS and other group companies of MUFG. This business group offers retail and small and medium-sized Japanese Corporate & Investment Banking Business Group Global Corporate & Investment Banking Business Group non-Japanese Global Commercial Banking Business Group medium-sized Asset Management & Investor Services Business Group Global Markets Business Group Other Management does not use information on segments’ total assets to allocate resources and assess performance. Accordingly, business segment information on total assets is not presented. The MUFG Group made modifications to the MUFG Group’s internal management accounting rules and practices to clarify the responsibility for profits of each business segment, effective April 1, 2019. Major rule changes are (i) reallocation of overseas Japanese corporates business in MUFG Americas Holdings previously included in the Global Commercial Banking Business Group into the Japanese Corporate & Investment Banking Business Group due to the refinement of definition, (ii) reallocation of operating expenses among Business Groups based on cost drivers due to the refinement of definition, and (iii) allocation of adjustments related to the derivative counterparty risk previously included in Other to the Customer Business Groups and the Global Markets Business Group that held the derivative assets. These modifications had the following impact for the fiscal years ended March 31, 2018 and 2019: • increasing the operating profits of the Global Corporate & Investment Banking Business Group by ¥1.8 billion for the fiscal year ended March 31, 2018, the Retail & Commercial Banking Business Group by ¥1.9 billion for the fiscal year ended March 31, 2019, the Global Markets Business Group and Other by ¥6.3 billion and ¥29.7 billion, respectively for the fiscal year ended March 31, 2018, and ¥5.1 billion and ¥30.6 billion, respectively for the fiscal year ended March 31, 2019; and • reducing the operating profits of the Retail & Commercial Banking Business Group by ¥0.5 billion for the fiscal year ended March 31, 2018, the Global Corporate & Investment Banking Business Group by ¥ billion for the fiscal year ended March 31, 2019, the Japanese Corporate & Investment Banking Business Group and the Global Commercial Banking Business Group by and ¥18.7 billion and Prior period business segment information has been restated to enable comparison between the relevant amounts for the fiscal years ended March 31, 2018, 2019 and 2020. Customer Business Global Other Total Retail & Japanese Global Global Asset Total (in billions) Fiscal year ended March 31, 2018: Net revenue: ¥ 1,582.5 ¥ 523.2 ¥ 364.3 ¥ 652.8 ¥ 190.4 ¥ 3,313.2 ¥ 574.5 ¥ 30.4 ¥ 3,918.1 BK and TB (1) 781.6 433.0 236.9 (3.3 ) 83.8 1,532.0 369.3 128.6 2,029.9 Net interest income 463.4 148.9 92.1 (3.3 ) — 701.1 235.1 183.5 1,119.7 Net fees 246.4 225.1 146.8 — 83.8 702.1 (12.0 ) (22.9 ) 667.2 Other 71.8 59.0 (2.0 ) — — 128.8 146.2 (32.0 ) 243.0 Other than BK and TB 800.9 90.2 127.4 656.1 106.6 1,781.2 205.2 (98.2 ) 1,888.2 Operating expenses 1,226.3 314.8 226.7 468.8 119.4 2,356.0 228.7 132.8 2,717.5 Operating profit (loss) ¥ 356.2 ¥ 208.4 ¥ 137.6 ¥ 184.0 ¥ 71.0 ¥ 957.2 ¥ 345.8 ¥ (102.4 ) ¥ 1,200.6 Fiscal year ended March 31, 2019: Net revenue: ¥ 1,522.0 ¥ 545.2 ¥ 383.8 ¥ 690.5 ¥ 203.0 ¥ 3,344.5 ¥ 479.8 ¥ (11.9 ) ¥ 3,812.4 BK and TB (1) 737.1 415.0 254.0 (1.3 ) 93.2 1,498.0 303.9 59.1 1,861.0 Net interest income 457.2 150.2 110.9 (1.3 ) — 717.0 227.8 200.4 1,145.2 Net fees 243.8 210.3 142.4 — 93.2 689.7 (13.9 ) (54.9 ) 620.9 Other 36.1 54.5 0.7 — — 91.3 90.0 (86.4 ) 94.9 Other than BK and TB 784.9 130.2 129.8 691.8 109.8 1,846.5 175.9 (71.0 ) 1,951.4 Operating expenses 1,221.3 309.3 241.5 483.5 124.6 2,380.2 223.5 136.4 2,740.1 Operating profit (loss) ¥ 300.7 ¥ 235.9 ¥ 142.3 ¥ 207.0 ¥ 78.4 ¥ 964.3 ¥ 256.3 ¥ (148.3 ) ¥ 1,072.3 Fiscal year ended March 31, 2020: Net revenue: ¥ 1,501.6 ¥ 551.1 ¥ 376.8 ¥ 804.6 ¥ 243.0 ¥ 3,477.1 ¥ 575.2 ¥ 15.7 ¥ 4,068.0 BK and TB (1) 721.1 420.7 270.5 0.1 94.6 1,507.0 358.4 12.7 1,878.1 Net interest income 439.0 164.2 115.2 0.9 2.5 721.8 123.1 85.4 930.3 Net fees 248.0 205.0 137.6 — 92.2 682.8 (12.6 ) (64.8 ) 605.4 Other 34.1 51.5 17.7 (0.8 ) (0.1 ) 102.4 247.9 (7.9 ) 342.4 Other than BK and TB 780.5 130.4 106.3 804.5 148.4 1,970.1 216.8 3.0 2,189.9 Operating expenses 1,203.0 315.8 247.8 571.8 171.7 2,510.1 232.2 150.7 2,893.0 Operating profit (loss) ¥ 298.6 ¥ 235.3 ¥ 129.0 ¥ 232.8 ¥ 71.3 ¥ 967.0 ¥ 343.0 ¥ (135.0 ) ¥ 1,175.0 Note: (1) “BK and TB” is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis. Reconciliation As set forth above, the measurement basis and the income and expense items of the internal management reporting system are different from the accompanying consolidated statements of income. Therefore, it is impracticable to present reconciliations of all of the business segments’ information, other than operating profit, to corresponding items in the accompanying consolidated statements of income. A reconciliation of operating profit under the internal management reporting system for the fiscal years ended March 31, 2018, 2019 and 2020 above to income before income tax expense shown in the accompanying consolidated statements of income is as follows: 2018 2019 2020 (in billions) Operating profit: ¥ 1,201 ¥ 1,072 ¥ 1,175 Reversal of (provision for) credit losses 241 (34 ) (322 ) Trading account profits (losses)—net (287 ) 182 920 Equity investment securities gains (losses)—net 215 (305 ) (618 ) Debt investment securities gains (losses)—net 71 (3 ) (403 ) Foreign exchange gains (losses)—net 7 47 (145 ) Equity in earnings of equity method investees—net 228 210 283 Impairment of goodwill — — (384 ) Impairment of intangible assets (22 ) (118 ) (4 ) Reversal of (provision for) off-balance 96 (38 ) 62 Other—net (88 ) (142 ) (131 ) Income before income tax expense ¥ 1,662 ¥ 871 ¥ 433

Foreign Activities _Text Block_

Foreign Activities [Text Block]	12 Months Ended
Foreign Activities [Text Block]	Mar. 31, 2020
Text Block [Abstract]
Foreign Activities [Text Block]	3 0 FOREIGN ACTIVITIES Foreign operations include the business conducted by overseas offices, as well as international business conducted from domestic offices, principally several international banking-related divisions of MUFG Bank’s and Mitsubishi UFJ Trust and Banking’s head office in Tokyo, and involve various transactions with debtors and customers residing outside Japan. Close integration of the MUFG Group’s foreign and domestic activities makes precise estimates of the amounts of assets, liabilities, income and expenses attributable to foreign operations difficult and necessarily subjective. Assets, income and expenses attributable to foreign operations are allocated to geographical areas based on the domicile of the debtors and customers. Generally, interest rates with respect to funds borrowed and loaned between domestic and foreign operations are based on prevailing money market rates appropriate for the transactions. In general, the MUFG Group has allocated all direct expenses and a proportionate share of general and administrative expenses to income derived from foreign loans and other transactions by the MUFG Group’s foreign operations. The following table sets forth estimated total assets at March 31, 2018, 2019 and 2020, and estimated total revenue, total expense, income (loss) before income tax expense (benefit) and net income (loss) attributable to Mitsubishi UFJ Financial Group for the respective fiscal years then ended: Domestic Foreign Total Japan United Europe Asia/Oceania Other (1) (in millions) Fiscal year ended March 31, 2018: Total revenue (2) ¥ 2,127,278 ¥ 1,337,529 ¥ 506,211 ¥ 779,983 ¥ 443,106 ¥ 5,194,107 Total expense (3) 1,687,344 843,885 173,665 651,125 176,269 3,532,288 Income before income tax expense 439,934 493,644 332,546 128,858 266,837 1,661,819 Net income attributable to Mitsubishi UFJ Financial Group 140,091 447,887 322,581 92,016 225,585 1,228,160 Total assets at end of fiscal year 196,121,542 44,831,664 22,342,574 27,163,121 10,111,411 300,570,312 Fiscal year ended March 31, 2019: Total revenue (2) ¥ 1,886,469 ¥ 1,637,569 ¥ 222,267 ¥ 1,157,946 ¥ 504,372 ¥ 5,408,623 Total expense (3) 2,204,147 1,012,978 173,934 892,729 253,993 4,537,781 Income (loss) before income tax expense (benefit) (317,678 ) 624,591 48,333 265,217 250,379 870,842 Net income (loss) attributable to Mitsubishi UFJ Financial Group (345,148 ) 573,698 50,877 214,582 224,636 718,645 Total assets at end of fiscal year 194,070,495 49,987,389 21,535,278 27,992,986 11,642,751 305,228,899 Fiscal year ended March 31, 2020: Total revenue (2) ¥ 1,596,794 ¥ 2,223,984 ¥ 89,412 ¥ 1,326,426 ¥ 566,222 ¥ 5,802,838 Total expense (3) 2,565,895 1,051,164 218,623 1,174,200 359,736 5,369,618 Income (loss) before income tax expense (benefit) (969,101 ) 1,172,820 (129,211 ) 152,226 206,486 433,220 Net income (loss) attributable to Mitsubishi UFJ Financial Group (1,001,477 ) 1,113,913 (140,372 ) 142,568 191,323 305,955 Total assets at end of fiscal year 207,532,337 60,587,867 19,099,410 30,845,864 13,687,805 331,753,283 Notes: (1) Other areas primarily include Canada, Latin America, the Caribbean and the Middle East. (2) Total revenue is comprised of Interest income and Non-interest (3) Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest The following is an analysis of certain asset and liability accounts related to foreign activities at March 31, 2019 and 2020: 2019 2020 (in millions) Cash and due from banks ¥ 828,839 ¥ 971,870 Interest-earning deposits in other banks 8,453,191 12,662,558 Total ¥ 9,282,030 ¥ 13,634,428 Trading account assets ¥ 26,991,984 ¥ 31,374,451 Investment securities ¥ 8,779,340 ¥ 9,040,512 Loans—net of unearned income, unamortized premiums and deferred loan fees ¥ 51,678,674 ¥ 53,079,542 Deposits ¥ 49,044,234 ¥ 49,291,478 Funds borrowed: Call money, funds purchased ¥ 67,246 ¥ 276,040 Payables under repurchase agreements 9,459,547 13,476,026 Payables under securities lending transactions 47,886 176,998 Other short-term borrowings 5,107,832 4,733,138 Long-term debt 2,697,463 2,733,242 Total ¥ 17,379,974 ¥ 21,395,444 Trading account liabilities ¥ 3,897,844 ¥ 6,575,570

Fair Value _Text Block_

Fair Value [Text Block]	12 Months Ended
Fair Value [Text Block]	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value [Text Block]	3 1 FAIR VALUE Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The guidance on fair value measurements also specifies a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable inputs, for example, the reporting entity’s own data. Based on the observability of the inputs used in the valuation techniques, the following three-level hierarchy is specified by the guidance: • Level 1—Unadjusted quoted prices for identical instruments in active markets. • Level 2—Observable inputs other than Level 1 prices for substantially the full term of the instruments, such as quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; other inputs that are observable; or market-corroborated inputs. • Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the instruments. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The MUFG Group has an established and documented process for determining fair values in accordance with the guidance. When available, quoted prices are used to determine fair value. If quoted prices are not available, fair value is based upon valuation techniques that use observable or unobservable inputs. The fair values of liabilities are determined by discounting future cash flows at a rate which incorporates the MUFG Group’s own creditworthiness. In addition, valuation adjustments may be made to ensure the financial instruments are recorded at fair value. These adjustments include, but are not limited to, amounts that reflect counterparty credit quality, funding cost, liquidity risk and model risk. The following section describes the valuation techniques used by the MUFG Group to measure fair values of certain financial instruments. The discussion includes the general classification of such financial instruments in accordance with the fair value hierarchy, a brief explanation of the valuation techniques, the significant inputs to those valuation techniques, and any additional significant assumptions. Trading Account Assets and Liabilities—Trading Account Securities When quoted prices are available in an active market, the MUFG Group uses quoted prices to measure the fair values of securities and such securities are classified in Level 1 of the fair value hierarchy. Examples of Level 1 securities include certain Japanese and foreign government bonds, and marketable equity securities. When quoted prices are available but the securities are not traded in active markets, such securities are classified in Level 2 of the fair value hierarchy. These securities include certain Japanese government agency bonds, Japanese prefectural and municipal bonds, foreign government and official institution bonds, corporate bonds, residential mortgage-backed securities and equity securities. As for quoted prices provided by third-party vendors, independent price verification is performed by the MUFG group to determine the quality and reliability of the data for fair value measurement purposes. As part of its independent price verification procedures, the MUFG group obtains a sufficient understanding of the vendors’ pricing sources and valuation processes. Further, the MUFG group performs internal price verification procedures to ensure that the quoted prices provided from the third-party vendors are reasonable. Such verification procedures include comparison of pricing sources and analysis of variances beyond certain thresholds. When quoted prices are not available, the MUFG Group estimates fair values by using an internal model, quoted prices of securities with similar characteristics or non-binding non-binding When there is less liquidity for securities or significant inputs used in the fair value measurements are unobservable, such securities are classified in Level 3 of the fair value hierarchy. Examples of such Level 3 securities include CLOs backed by general corporate loans, which are classified in asset-backed securities. The fair value of CLOs is measured by weighing the estimated fair value amounts from the internal model and the non-binding Trading Account Assets and Liabilities—Derivatives Exchange-traded derivatives valued using quoted prices are classified in Level 1 of the fair value hierarchy. Examples of Level 1 derivatives include stock futures index and interest rate futures. However, the majority of the derivative contracts entered into by the MUFG Group are traded over-the-counter Derivatives that are valued using valuation techniques with significant unobservable inputs are classified in Level 3 of the fair value hierarchy. Examples of Level 3 derivatives include long-term interest rate or currency swaps and certain credit derivatives, where significant inputs such as volatility and correlation of such inputs are unobservable. Investment Securities Investment securities include Available-for-sale Other Assets Other assets measured at fair value mainly consist of securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivatives designated as hedging instruments. The securities received as collateral under lending transactions mainly consist of certain Japanese and foreign government bonds which are valued using the valuation techniques previously described in the section entitled “Trading Accounts Assets and Liabilities—Trading Account Securities” Money in trust for segregating cash deposited by customers on security transactions mainly consists of certain Japanese government bonds which are valued using the valuation techniques described in the “Trading Account Assets and Liabilities—Trading Account Securities” The fair values of derivatives designated as hedging instruments are measured using the valuation techniques described in the “Trading Account Assets and Liabilities—Derivatives” Obligations to Return Securities Received as Collateral Obligations to return securities received as collateral under securities lending transactions included in Other liabilities are measured at the fair values of the securities received as collateral. The securities received as collateral consist primarily of certain Japanese and foreign government bonds, whose fair values are measured using the valuation techniques described in the “Trading Account Assets and Liabilities—Trading Account Securities” Other Short-term Borrowings and Long-term Debt Certain short-term borrowings and long Market Valuation Adjustments Counterparty credit risk adjustments are made to certain financial assets such as over-the-counter Funding valuation adjustment (“FVA”) represents the adjustment to reflect the impact of uncollateralized funding. The FVA is calculated using the MUFG’s market funding spread and the funding exposure of any uncollateralized component of the over-the-counter Liquidity adjustments are applied mainly to the instruments classified in Level 3 of the fair value hierarchy when recent observable prices of such instruments are not available or such instruments are traded in inactive or less active markets. The liquidity adjustments are based on the facts and circumstances of the markets including the availability of external quotes and the time since the latest available quote. Model valuation adjustments such as unobservable parameter valuation adjustments may be provided when the fair values of instruments are determined based on internally developed valuation techniques. Examples of such adjustments include adjustments to the model price of certain derivatives where parameters such as correlation are unobservable. Unobservable parameter valuation adjustments are applied to mitigate Investments in Certain Entities That Calculate Net Asset Value per Share The MUFG Group has interests in investment funds mainly private equity funds, and real estate funds that are measured at fair value on a recurring or nonrecurring basis. Private equity funds have specific investment objectives in connection with their acquisition of equity interests, such as providing financing and other support to start-up Real estate funds invest globally and primarily in real estate companies, debt recapitalizations and direct property. These investments are generally not redeemable with the funds. Distributions from each fund will be received as the underlying investments of the funds are liquidated, the timing of which is uncertain. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present the financial instruments carried at fair value by level within the fair value hierarchy as of March 31, 2019 and 2020: At March 31, 2019 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 12,821,328 ¥ 13,725,079 ¥ 785,326 ¥ 27,331,733 Debt securities Japanese national government and Japanese government agency bonds 2,117,841 512,134 — 2,629,975 Japanese prefectural and municipal bonds — 117,799 — 117,799 Foreign government and official institution bonds 9,264,028 454,365 792 9,719,185 Corporate bonds — 3,203,585 31,384 3,234,969 Residential mortgage-backed securities — 7,038,353 35,181 7,073,534 Asset-backed securities — 253,274 627,678 880,952 Other debt securities — 747 35,148 35,895 Commercial paper — 1,473,693 — 1,473,693 Equity securities (2) 1,439,459 671,129 55,143 2,165,731 Trading derivative assets 63,582 13,047,590 93,313 13,204,485 Interest rate contracts 23,430 10,067,719 17,307 10,108,456 Foreign exchange contracts 1,115 2,771,115 22,861 2,795,091 Equity contracts 39,037 139,666 9,000 187,703 Commodity contracts — 3,727 25,684 29,411 Credit derivatives — 65,363 18,461 83,824 Investment securities: Available-for-sale 22,550,086 10,684,983 283,434 33,518,503 Japanese national government and Japanese government agency bonds 20,635,872 3,441,824 — 24,077,696 Japanese prefectural and municipal bonds — 2,226,566 — 2,226,566 Foreign government and official institution bonds 1,914,214 707,959 19,246 2,641,419 Corporate bonds — 1,126,535 4,196 1,130,731 Residential mortgage-backed securities — 1,615,336 15 1,615,351 Commercial mortgage-backed securities — 128,917 2,038 130,955 Asset-backed securities — 1,371,467 131,455 1,502,922 Other debt securities — 66,379 126,484 192,863 Equity securities 5,982,629 375,914 27,820 6,386,363 Marketable equity securities 5,982,629 375,914 — 6,358,543 Nonmarketable equity securities (3) — — 27,820 27,820 Other (4) 807,193 42,184 32,378 881,755 Total ¥ 42,224,818 ¥ 37,875,750 ¥ 1,222,271 ¥ 81,322,839 At March 31, 2019 Level 1 Level 2 Level 3 Fair Value ( in millions Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 157,114 ¥ 5,796 ¥ — ¥ 162,910 Trading derivative liabilities 88,329 12,701,110 57,143 12,846,582 Interest rate contracts 35,179 9,839,618 21,496 9,896,293 Foreign exchange contracts 2,633 2,663,347 4,670 2,670,650 Equity contracts 50,517 126,737 6,138 183,392 Commodity contracts — 2,916 24,735 27,651 Credit derivatives — 68,492 104 68,596 Obligation to return securities received as collateral (5) 2,912,355 174,671 — 3,087,026 Other (6) — 426,368 65,648 492,016 Total ¥ 3,157,798 ¥ 13,307,945 ¥ 122,791 ¥ 16,588,534 At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 14,891,635 ¥ 17,061,985 ¥ 525,946 ¥ 32,479,566 Debt securities Japanese national government and Japanese government agency bonds 3,805,039 350,128 — 4,155,167 Japanese prefectural and municipal bonds — 93,479 — 93,479 Foreign government and official institution bonds 9,356,427 417,766 1,052 9,775,245 Corporate bonds 11 2,537,559 144 2,537,714 Residential mortgage-backed securities — 9,037,539 — 9,037,539 Asset-backed securities — 590,556 416,259 1,006,815 Other debt securities — 7,787 6,651 14,438 Commercial paper — 2,959,580 — 2,959,580 Equity securities (2) 1,730,158 1,067,591 101,840 2,899,589 Trading derivative assets 216,834 14,680,632 60,108 14,957,574 Interest rate contracts 74,488 10,758,790 13,329 10,846,607 Foreign exchange contracts 1,550 3,723,087 9,046 3,733,683 Equity contracts 140,796 87,285 7,491 235,572 Commodity contracts — 10 27,492 27,502 Credit derivatives — 111,460 2,750 114,210 Investment securities: Available-for-sale 22,126,881 11,798,392 274,930 34,200,203 Japanese national government and Japanese government agency bonds 19,897,187 3,565,692 — 23,462,879 Japanese prefectural and municipal bonds — 2,952,820 — 2,952,820 Foreign government and official institution bonds 2,229,694 792,027 15,767 3,037,488 Corporate bonds — 1,262,718 10,108 1,272,826 Residential mortgage-backed securities — 1,459,378 15 1,459,393 Commercial mortgage-backed securities — 380,278 1,977 382,255 Asset-backed securities — 1,328,601 140,875 1,469,476 Other debt securities — 56,878 106,188 163,066 Equity securities 4,471,499 296,819 39,963 4,808,281 Marketable equity securities 4,471,499 296,819 — 4,768,318 Nonmarketable equity securities (3) — — 39,963 39,963 Other (4) 1,054,186 45,913 36,701 1,136,800 Total ¥ 42,761,035 ¥ 43,883,741 ¥ 937,648 ¥ 87,582,424 At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 555,664 ¥ 3,718 ¥ — ¥ 559,382 Trading derivative liabilities 300,215 13,851,205 56,631 14,208,051 Interest rate contracts 153,098 10,038,198 14,079 10,205,375 Foreign exchange contracts 3,360 3,596,589 4,041 3,603,990 Equity contracts 143,757 121,229 11,713 276,699 Commodity contracts — 14 26,775 26,789 Credit derivatives — 95,175 23 95,198 Obligation to return securities received as collateral (5) 4,663,068 143,103 — 4,806,171 Other (6) — 514,003 6,606 520,609 Total ¥ 5,518,947 ¥ 14,512,029 ¥ ¥ 20,094,213 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥40,400 million and ¥66,918 million at March 31, 2019 and 2020, respectively. The amounts of unfunded commitments related to these private equity funds were ¥94,483 million and ¥102,743 million at March 31, 2019 and 2020, respectively. (3) Excludes certain investments valued at net asset value of real estate funds and private equity and other , respectively, and those at March 31, 2020 were ¥23,233 million and ¥18,862 million, respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2019 were ¥2,054 million and nil, respectively, and those at March 31, 2020 were ¥1,494 million and nil, respectively. (4) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments. (5) Included in Other liabilities. (6) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments. Changes in Level 3 Recurring Fair Value Measurements The following tables present a reconciliation of the assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the fiscal years ended March 31, 2019 and 2020. The determination to classify a financial instrument within Level 3 is based upon the significance of the unobservable inputs to overall fair value measurement. However, Level 3 financial instruments typically include, in addition to the unobservable or Level 3 input, observable inputs (inputs that are actively quoted and can be validated to external sources). Accordingly, the gains and losses in the tables below include changes in fair value due in part to observable inputs used in the valuation techniques. March 31, Total gains (losses) Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 827,493 ¥ 23,848 (2) ¥ (1,341 ) ¥ 454,048 ¥ — ¥ (316,384 ) ¥ (213,944 ) ¥ 29,445 ¥ (17,839 ) ¥ 785,326 ¥ 18,299 (2) Debt securities Foreign government and official institution bonds 1,047 863 — 117,619 — (118,377 ) (317 ) — (43 ) 792 5 Corporate bonds 23,092 611 — 2,040 — (1,798 ) (4,188 ) 29,423 (5) (17,796 ) (5) 31,384 286 Residential mortgage-backed securities 41,141 (282 ) — — — — (5,678 ) — — 35,181 (289 ) Asset-backed securities 684,637 18,692 (1,341 ) 315,865 — (195,851 ) (194,324 ) — — 627,678 15,528 Other debt securities 33,450 1,698 — — — — — — — 35,148 1,698 Equity securities 44,126 2,266 — 18,524 — (358 ) (9,437 ) 22 — 55,143 1,071 Trading derivatives—net 12,119 (5,871 ) (2) (744 ) 787 (682 ) — 37 20,192 10,332 36,170 (25,241 ) (2) Interest rate contracts—net 14,596 12,397 57 — (119 ) — (25,601 ) (7,013 ) 1,494 (4,189 ) 11,507 Foreign exchange contracts—net 6,736 (10,997 ) (419 ) 210 — — (322 ) 27,230 (5) (4,247 ) 18,191 (10,451 ) Equity contracts—net (10,685 ) 18,756 (374 ) 13 (228 ) — (17,680 ) (25 ) 13,085 2,862 (752 ) Commodity contracts—net 683 32 6 564 (335 ) — (1 ) — — 949 795 Credit derivatives—net 789 (26,059 ) (14 ) — — — 43,641 — — 18,357 (26,340 ) Investment securities: Available-for-sale 350,660 6,415 (3) (9,791 ) 273,201 — — (338,180 ) 1,456 (327 ) 283,434 (498 ) (3) Foreign government and official institution bonds 20,192 — (876 ) 645 — — (715 ) — — 19,246 — Corporate bonds 6,037 (345 ) 3 3,450 — — (6,078 ) 1,456 (5) (327 ) (5) 4,196 (498 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed 2,430 — (135 ) — — — (257 ) — — 2,038 — Asset-backed securities 161,172 6,760 (5,016 ) 263,587 — — (295,048 ) — — 131,455 — Other debt securities 160,814 — (3,767 ) 5,519 — — (36,082 ) — — 126,484 — Equity securities 28,359 (2,298 ) (3) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) (3) Nonmarketable equity securities 28,359 (2,298 ) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) Other 8,660 (1,022 ) (7) (20 ) 24,961 — (206 ) — 5 — 32,378 (1,191 ) (7) Total ¥ 1,227,291 ¥ 21,072 ¥ (11,896 ) ¥ 756,792 ¥ (682 ) ¥ (318,008 ) ¥ (552,087 ) ¥ 51,098 ¥ (8,452 ) ¥ 1,165,128 ¥ (11,691 ) Liabilities Other ¥ (25,528 ) ¥ (19,629 ) (4) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 (6) ¥ 35,230 (6) ¥ 65,648 ¥ (10,778 ) (4) Total ¥ (25,528 ) ¥ (19,629 ) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 ¥ 35,230 ¥ 65,648 ¥ (10,778 ) March 31, Total gains (losses) for the period Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 785,326 ¥ (22,419 ) (2) ¥ — ¥ 227,656 ¥ — ¥ (214,183 ) ¥ (225,980 ) ¥ 52,140 ¥ (76,594 ) ¥ 525,946 ¥ (18,915 ) (2) Debt securities Foreign government and official institution bonds 792 589 — 93,957 — (92,748 ) (18 ) — (1,520 ) 1,052 (12 ) Corporate bonds 31,384 (279 ) — 631 — (3,937 ) (4,721 ) 24,882 (5) (47,816 ) (5) 144 (13 ) Residential mortgage-backed securities 35,181 (695 ) — — — (23,837 ) (10,649 ) — — — — Asset-backed securities 627,678 (23,494 ) — 113,239 — (93,655 ) (207,509 ) — — 416,259 (18,815 ) Other debt securities 35,148 (1,239 ) — — — — — — (27,258 ) ( 8 ) 6,651 (387 ) Equity securities 55,143 2,699 — 19,829 — (6 ) (3,083 ) 27,258 (8) — 101,840 312 Trading derivatives—net 36,170 4,503 (2) 178 714 (1,449 ) — (33,463 ) 40,857 (44,033 ) 3,477 (16,742 ) (2) Interest rate contracts—net (4,189 ) 21,290 (24 ) — — — (12,025 ) 2,254 (8,056 ) (750 ) 8,046 Foreign exchange contracts—net 18,191 (21,429 ) 89 3 — — 4,858 35,444 (5) (32,151 ) (5) 5,005 (21,483 ) Equity contracts—net 2,862 5,188 110 96 (777 ) — (11,305 ) (41 ) (355 ) (4,222 ) (2,846 ) Commodity contracts—net 949 (174 ) (1 ) 615 (672 ) — — — — 717 (167 ) Credit derivatives—net 18,357 (372 ) 4 — — — (14,991 ) 3,200 (3,471 ) 2,727 (292 ) Investment securities: Available-for-sale 283,434 (2,402 ) (3) 804 281,041 — (24 ) (300,023 ) 15,201 (3,101 ) 274,930 (934 ) (3) Foreign government and official institution bonds 19,246 — 1,625 828 — — (5,932 ) — — 15,767 — Corporate bonds 4,196 (458 ) 342 663 — (1 ) (6,734 ) 15,201 (5) (3,101 ) (5) 10,108 (934 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,038 — 125 — — (23 ) (163 ) — — 1,977 — Asset-backed securities 131,455 (1,944 ) (1,085 ) 274,110 — — (261,661 ) — — 140,875 — Other debt securities 126,484 — (203 ) 5,440 — — (25,533 ) — — 106,188 — Equity securities 27,820 2,585 (3) — 12,718 — (2,527 ) (35 ) — (598 ) 39,963 863 (3) Nonmarketable equity securities 27,820 2,585 — 12,718 — (2,527 ) (35 ) — (598 ) 39,963 863 Other 32,378 (10,105 ) (7) (375 ) 44,324 — (29,334 ) (187 ) — — 36,701 (10,136 ) (7) Total ¥ 1,165,128 ¥ (27,838 ) ¥ 607 ¥ 566,453 ¥ (1,449 ) ¥ (246,068 ) ¥ (559,688 ) ¥ 108,198 ¥ (124,326 ) ¥ 881,017 ¥ (45,864 ) Liabilities Other ¥ 65,648 ¥ (5,388 ) (4) ¥ (414 ) ¥ — ¥ 2,258 ¥ — ¥ (21,133 ) ¥ 333 (6) ¥ (46,302 ) (6) ¥ 6,606 ¥ 9,648 (4) Total ¥ 65,648 ¥ (5,388 ) ¥ (414 ) ¥ — ¥ 2,258 ¥ — ¥ (21,133 ) ¥ 333 ¥ (46,302 ) ¥ 6,606 ¥ 9,648 Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits (losses)—net and in Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net. (4) Included in Trading account profits (losses)—net. (5) Transfers into (out of) Level 3 for Corporate bonds were caused (6) Transfers into (out of) Level 3 for bifurcated embedded derivatives in Other were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs. (7) Included in Fees and commissions income and Other non-interest (8) Transfers relate to the reclassification of certain securities. Quantitative Information about Level 3 Fair Value Measurements The following tables present information on the valuation techniques, significant unobservable inputs and their ranges for each major category of assets and liabilities measured at fair value on a recurring basis and classified in Level 3: At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 19,246 Return on equity method Probability of default 0.0%~0.4% 0.3 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 109,213 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 67.2 % Loan price 90.5%~100.3% 95.4 % 587,577 Internal model (4) Asset correlations 10.0% 10.0 % Discount factor 1.0%~1.2% 1.2 % Prepayment rate 22.7% 22.7 % Probability of default 0.0%~90.1% — (3) Recovery rate 64.3% 64.3 % Other debt securities 35,148 Discounted cash flow Liquidity premium 1.0%~2.4% 1.3 % 112,822 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 78.0 % Market-required return on capital 8.0%~10.0% 9.5 % At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (4,189 ) Option model Probability of default 0.0%~12.0% Correlation between interest rates 29.2%~51.3% Correlation between interest rate and foreign exchange rate 22.8%~60.0% Recovery rate 41.0%~48.0% Volatility 11.0%~71.3% Foreign exchange 18,198 Option model Probability of default 0.0%~12.0% Correlation between interest rates 35.0%~70.0% Correlation between interest rate and foreign exchange rate 14.8%~60.0% Recovery rate 41.0%~48.0% Correlation between underlying assets 65.0% Volatility 9.7%~18.2% Equity contracts—net (2,727 ) Option model Correlation between foreign exchange rate and equity 7.0%~64.1% Correlation between equities 21.6%~80.3% Correlation between underlying assets 51.7%~82.0% Volatility 21.0%~30.0% 5,878 Discounted cash flow Term of litigation 1.0 year At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 15,767 Return on equity method Probability of default 0.2%~1.3% 0.4 % Recovery rate 55.0%~90.0% 69.9 % Market-required return on capital 8.0 %~10.0% 9.9 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 92,025 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 68.2 % 389,170 Internal model (4) Asset correlations 1.0% 1.0 % Discount factor 1.1%~1.4% 1.4 % Prepayment rate 21.0% 21.0 % Probability of default 0.0%~99.0% — (3) Recovery rate 57.8% 57.8 % Other debt securities 6,651 Discounted cash flow Liquidity premium 2.4% 2.4 % 86,734 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 60.0%~90.0% 79.8 % Market-required return on capital 8.0%~10.0% 9.4 % Equity securities 27,144 Discounted cash flow Liquidity premium 1.0% 1.0 % At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (728 ) Option model Correlation between interest rates 32.9 Correlation 16.7%~60.0% Volatility 0.0%~100.0% Foreign exchange 5,005 Option model Correlation between interest rates 30.0%~70.0% Correlation between interest rate and foreign exchange rate 15.8%~60.0% Correlation between underlying assets 60.0% Volatility 7.5%~17.0% Equity contracts—net (10,038 ) Option model Correlation between foreign exchange rate and equity (58.4 ) Correlation between equities 19.5%~81.0% Volatility 24.2%~32.0% 6,166 Discounted cash flow Term of litigation 0.1 year~1.1 years Notes: (1) The fair value as of March 31, 2019 and 2020 excludes the fair value of investments valued using vendor prices. (2) Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments. (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs.” (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities.” Sensitivity to and range of unobservable inputs Probability of default default in the default rate would result in a significant decrease (increase) in a fair value through a decrease (increase) in the estimated cash flows. Probability of default used in internal model of Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities represents that of underlying assets, whereas probability of default used in other valuation techniques represents the counterparty default risks, determined through the MUFG Group’s credit rating system. The wide range of probability of default used in the internal model of Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities is mainly caused by Asset-backed securities. Asset-backed securities have a large number of underlying loans, mainly corporate loans, in several industries. The MUFG Group primarily makes investments in the senior tranches of such securities, with no investments in the equity portion. Thus, the MUFG Group’s investments have higher priority of payments than mezzanine and equity and even if some of underlying loans become default, the MUFG Group may still be able to receive the full contractual payments. Discount factor and Liquidity premium Recovery rate and Prepayment rate Volatility The level of volatility generally depends on the tenor of the underlying instrument and the strike price or level defined in the contract. Volatilities for certain combinations of tenor and strike price are not observable. The volatility inputs used to estimate fair value of interest rate contracts are distributed throughout the range. Correlation on its nature. In addition, the wide range of correlation inputs are primarily due to the complex and unique nature of these instruments. There are many different types of correlation inputs, including cross-asset correlation (such as correlation between interest rate and equity), and same-asset correlation (such as correlation between interest rates). Correlation levels are highly dependent on market conditions and could have a relatively wide range of levels within or across asset classes. For interest rate contracts and foreign exchange contracts, the diversity in the portfolio held by the MUFG Group is reflected in wide ranges of correlation, as the fair values of transactions with a variety of currencies and tenors are determined using several foreign exchange and interest rate curves. For equity derivative contracts, the wide range of correlation between interest rate and equity is primarily due to the large number of correlation pairs with different maturities of contracts. For credit derivative contracts, the wide range of correlation between underlying assets is primarily due to factors such as reference assets with different maturities, capital structure subordinations, and credit quality. Term of litigation These swaps are valued using a discounted cash flow methodology and are dependent upon the final resolution of the Covered Litigation. The settlement timing of the Covered Litigation is not observable in the market, therefore the estimated term is classified as a level 3 input. The restricted shares which the MUFG Group purchased will be convertible to listed shares of the issuer at the end of the Covered Litigation. The restricted shares will be diluted dependent upon the settlement amount of the Covered Litigation and the dilution of the restricted shares is accomplished through an adjustment to the conversion rate of the restricted shares. In order to hedge the reduction of the conversion rate, the MUFG Group entered into certain swaps with the seller which references the conversion rate. The value generated by these trades is subject to the ultimate term of the issuer’s litigation, subject to a minimum term referenced within the trade contracts. Market-required return on capital Loan Price Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities may be measured at fair value on a nonrecurring basis in periods subsequent nonmarketable equity securities. The following table presents the carrying value of assets measured at fair value on a nonrecurring basis by level within the fair value hierarchy as of March 31, 2019 and 2020: 2019 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 80,779 ¥ 4,208 ¥ 84,987 ¥ — ¥ 15,473 ¥ 2,703 ¥ 18,176 Loans 2,656 9,104 250,678 262,438 2,548 9,199 260,282 272,029 Loans held for sale — — 77,506 77,506 — — 73,573 73,573 Collateral dependent loans 2,656 9,104 173,172 184,932 2,548 9,199 186,709 198,456 Premises and equipment — — 35,352 35,352 — — 37,109 37,109 Intangible assets — — 19,635 19,635 — — 453 453 Goodwill — — — — — — 283,032 283,032 Other assets 136,528 49,756 9,774 196,058 73,015 — 18,609 91,624 Investments (1) 136,528 49,756 — 186,284 73,015 — 5,911 78,926 Other — — 9,774 9,774 — — 12,698 12,698 Total ¥ 139,184 ¥ 139,639 ¥ 319,647 ¥ 598,470 ¥ 75,563 ¥ 24,672 ¥ 602,188 ¥ 702,423 Notes: (1) Excludes certain investments valued at net asset value of ¥8,866 million and ¥12,935 million at March 31, 2019 and 2020, respectively. The unfunded commitments related to these investments are ¥12,242 million and ¥17,216 million at March 31, 2019 and 2020, respectively. These investments are in private equity funds. (2) Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative. The following table presents losses (gains)

Parent Company Only Financial I

Parent Company Only Financial Information [Text Block]	12 Months Ended
Parent Company Only Financial Information [Text Block]	Mar. 31, 2020
Condensed Financial Information Disclosure [Abstract]
Parent Company Only Financial Information [Text Block]	32. PARENT COMPANY ONLY FINANCIAL INFORMATION Distributions of retained earnings of MUFG Bank and Mitsubishi UFJ Trust and Banking are restricted in order to meet the minimum capital adequacy requirements under the Banking Law. Additionally, retained earnings of these banking subsidiaries are restricted, except for approximately ¥6,077 billion and ¥5,247 billion, in accordance with the statutory reserve requirements under the Companies Act at March 31, 2019 and 2020, respectively. See Notes 19 and 2 1 The Banking Law and related regulations restrict the ability of these banking subsidiaries to extend loans or credit to the parent company. Such loans or credits to the parent company are generally limited to 15% of the banking subsidiary’s consolidated total capital, as determined by the capital adequacy guidelines. At March 31, 2019 and 2020, approximately ¥5,160 billion and ¥5,696 billion, respectively, of net assets of consolidated subsidiaries may be restricted as to payment of cash dividends and loans to the parent company. The following table presents the parent company only financial information of MUFG: Condensed Balance Sheets As of March 31, 2019 (in millions) Assets: Cash and interest-earning deposits with banking subsidiaries ¥ 203,713 ¥ 185,668 Investments in subsidiaries and affiliated companies 16,668,232 16,116,568 Banking subsidiaries 12,754,653 12,361,190 Non-banking 3,913,579 3,755,378 Loans to subsidiaries 7,199,052 8,746,231 Banking subsidiaries 6,864,309 8,222,278 Non-banking 334,743 523,953 Other assets 223,725 241,441 Total assets ¥ 24,294,722 ¥ 25,289,908 Liabilities and Shareholders’ equity: Short-term borrowings from banking subsidiaries ¥ 1,425,682 ¥ 1,255,991 Long-term debt from non-banking 277,138 30,686 Long-term debt 7,187,469 8,758,646 Other liabilities 204,885 228,098 Total liabilities 9,095,174 10,273,421 Total shareholders’ equity 15,199,548 15,016,487 Total liabilities and shareholders’ equity ¥ 24,294,722 ¥ 25,289,908 Condensed Statements of Income Fiscal years ended March 31, 2018 2019 (in millions) Income: Dividends from subsidiaries and affiliated companies ¥ 576,332 ¥ 306,879 ¥ 376,376 Banking subsidiaries 487,491 207,161 277,472 Non-banking 88,841 99,718 98,904 Management fees from subsidiaries 26,073 28,305 33,543 Interest income from subsidiaries 80,670 127,117 174,500 Foreign exchange gains (losses)—net 24,726 (20,598 ) 4,834 Trading account losses—net (26,749 ) (8,078 ) (37,272 ) Gains on sales of investment in subsidiaries and affiliated companies — 252,253 67,406 Other income 1,508 3,199 14,968 Total income 682,560 689,077 634,355 Expense: Operating expenses 26,016 28,168 30,431 Interest expense to subsidiaries and affiliated companies 31,426 34,594 26,244 Interest expense 65,068 108,756 155,774 Other expense 1,791 1,657 15,024 Total expense 124,301 173,175 227,473 Equity in undistributed net income (loss) of subsidiaries and affiliated companies—net 672,421 194,390 (108,069 ) Income before income tax expense (benefit) 1,230,680 710,292 298,813 Income tax expense (benefit) 2,520 (8,353 ) (7,142 ) Net income ¥ 1,228,160 ¥ 718,645 ¥ 305,955 Condensed Statements of Cash Flows Fiscal years ended March 31, 2018 2019 2020 (in millions) Operating activities: Net income ¥ 1,228,160 ¥ 718,645 ¥ 305,955 Adjustments and other (799,571 ) (351,775 ) (1,704 ) Net cash provided by operatin g 428,589 366,870 304,251 Investing activities: — — 240,000 Proceeds from sales of investment in subsidiaries and affiliated companies — 455,605 135,581 Purchase of equity investment in subsidiaries and an affiliated company (53,000 ) (18,346 ) — Net increase in loans to subsidiaries (1,682,576 ) (2,112,711 ) (1,547,178 ) Other—net (4,361 ) (9,009 ) (12,572 ) Net cash used in investing activities (1,739,937 ) (1,684,461 ) (1,184,169 ) Financing activities: Net decrease in short-term borrowings from subsidiaries (41,402 ) (194,300 ) (164,272 ) Proceeds from issuance of long-term debt 1,872,986 2,043,677 1,844,488 Repayment of long-term debt (112,184 ) (314 ) (214,994 ) Repayment of long-term debt to affiliated companies (1,090 ) (500 ) (241,000 ) Proceeds from sales of treasury stock 1 3 2 Payments for acquisition of treasury stock (200,038 ) (150,277 ) (50,022 ) Dividends paid (241,067 ) (276,279 ) (304,538 ) Other—net (9,677 ) (15,490 ) (7,791 ) Net cash provided by financing activities 1,267,529 1,406,520 861,873 Net increase (decrease) in cash and cash equivalents (43,819 ) 88,929 (18,045 ) Cash and cash equivalents at beginning of fiscal year 158,603 114,784 203,713 Cash and cash equivalents at end of fiscal year ¥ 114,784 ¥ 203,713 ¥ 185,668

Subsequent Events _Text Block_

Subsequent Events [Text Block]	12 Months Ended
Subsequent Events [Text Block]	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events [Text Block]	3 3 SUBSEQUENT EVENTS Approval of Dividends On June 29

Basis of Financial Statements_2

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block] (Policies)	12 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Description of Business [Policy Text Block]	Description of Business Mitsubishi UFJ Financial Group, Inc. (“MUFG”) is a holding company for MUFG Bank, Ltd. (formerly, The Bank of Tokyo-Mitsubishi UFJ, Ltd., “MUFG Bank” or “BK”), Mitsubishi UFJ Trust and Banking Corporation (“Mitsubishi UFJ Trust and Banking” or “TB”), Mitsubishi UFJ Securities Holdings Co., Ltd. (“Mitsubishi UFJ Securities Holdings” or “SCHD”), Mitsubishi UFJ NICOS Co., Ltd. (“Mitsubishi UFJ NICOS”), and other subsidiaries. Mitsubishi UFJ Securities Holdings is an intermediate holding company for Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. (“Mitsubishi UFJ Morgan Stanley Securities”). Through its subsidiaries and affiliated companies, MUFG engages in a broad range of financial operations, including commercial banking, investment banking, trust banking and asset management services, securities businesses, and credit card businesses, and it provides related services to individual and corporate customers. See Note 29
Basis of Financial Statements [Policy Text Block]	Basis of Financial Statements The accompanying consolidated financial statements are presented in Japanese yen, the currency of the country in which MUFG is incorporated and principally operates. The accompanying consolidated financial statements have been prepared on the basis of accounting principles generally accepted in the United States of America (“U.S. GAAP”). In certain respects, the accompanying consolidated financial statements reflect adjustments which are not included in the consolidated financial statements issued by MUFG and certain of its subsidiaries in accordance with applicable statutory requirements and accounting practices in their respective countries of incorporation. The major adjustments include those relating to (1) investment securities, (2) derivative financial instruments, (3) allowance for credit losses, (4) income taxes, (5) consolidation, (6) premises and equipment, (7) transfer of financial assets, (8) accrued severance indemnities and pension liabilities, (9) goodwill and other intangible assets and (10) lease transactions. Fiscal years of certain subsidiaries, which end on December 31, and MUFG’s fiscal year, which ends on March 31, have been treated as coterminous. For the fiscal years ended March 31, 2018, 2019 and 2020, the effect of recording intervening events for the three-month periods ended March 31 on MUFG’s proportionate equity in net income of subsidiaries with fiscal years ended on December 31, would have resulted in a decrease of ¥10.76 billion, an increase of ¥19.97 billion, and a de billion to net income attributable to Mitsubishi UFJ Financial Group, respectively. The decrease for the three-month period ended on March 31, 2020 was largely due to an additional allowance for loan losses caused by COVID-19 and goodwill impairment. See Note s 4 and 6 for more information. MUFG concluded that these intervening events do not represent substantial and permanent effects on its consolidated financial statements in any of the years presented.
Use of Estimates [Policy Text Block]	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to management judgment primarily relate to the allowance for credit losses, the valuation of deferred tax assets, the valuation of financial instruments, the accounting for goodwill and intangible assets, impairment of investment securities, the allowances for repayment of excess interest and accrued severance indemnities and pension liabilities.
Consolidation [Policy Text Block]	Consolidation investees-net. The MUFG Group consolidates VIEs if it has the power to direct the activities of a VIE which most significantly impact the VIE’s economic performance and has the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. To assess whether a VIE should be consolidated or not, the MUFG Group considers all factors, such as the purpose and design of the VIE, contractual arrangements, and the MUFG Group’s involvement in both the establishment of the VIE and day-to-day Assets that the MUFG Group holds in an agency, fiduciary or trust capacity are not assets of the MUFG Group and, accordingly, are not included in the accompanying consolidated balance sheets.
Cash Flows [Policy Text Block]	Cash Flows
Translation of Foreign Currency Financial Statements and Foreign Currency Transactions [Policy Text Block]	Translation of Foreign Currency Financial Statements and Foreign Currency Transactions year-end Foreign currency translation gains and losses related to the financial statements of overseas entities of the MUFG Group, net of related income tax effects, are credited or charged directly to Foreign currency translation adjustments, a component of Accumulated other comprehensive income (“Accumulated OCI”). Tax effects of gains and losses on foreign currency translation of the financial statements of overseas entities are not recognized unless it is apparent that the temporary differences will reverse in the foreseeable future. Foreign currency-denominated assets and liabilities are translated into the functional currencies of the individual entities included in consolidation at the respective fiscal year-end
Repurchase Agreements, Securities Lending and Other Secured Financing Transactions [Policy Text Block]	Repurchase Agreements, Securities Lending and Other Secured Financing Transactions off-balance off-balance
Collateral [Policy Text Block]	Collateral— mark-to-market
Trading Account Securities [Policy Text Block]	Trading Account Securities— 1
Investment Securities [Policy Text Block]	Investment Securities— Held-to-maturity Available-for-sale net-of-tax the noncredit component is recognized in Accumulated OCI. In determining other-than-temporary declines in fair value to be recognized as an impairment loss on debt securities, the MUFG Group generally considers factors such as the ability and positive intent to hold the investments for a period of time sufficient to allow for anticipated recovery in fair value, the financial condition of the issuer, the extent of decline in fair value, and the length of time that the decline in fair value below cost has existed. Equity securities include marketable equity investment securities and nonmarketable equity investment securities. Marketable equity investment securities are measured at fair value with unrealized gains or losses reflected in net income. Nonmarketable equity investment securities are primarily measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes. Nonmarketable equity investment securities held by subsidiaries that are investment companies or brokers and dealers, are subject to the specialized industry accounting principles for investment companies and brokers and dealers. Securities of those subsidiaries are carried at their fair values. Interest and dividends on investment securities are reported in Interest income. Dividends are recognized when the shareholder right to receive the dividend is established. Gains and losses on disposition of investment securities are computed using the average cost method and are recognized on the trade date.
Derivative Financial Instruments [Policy Text Block]	Derivative Financial Instruments— Derivatives entered into for trading purposes are carried at fair value and are reported as Trading account assets or Trading account liabilities, as appropriate. The fair values of derivative contracts executed with the same counterparty under legally enforceable master netting agreements are presented on a gross basis. Changes in the fair value of such contracts are recognized currently in Foreign exchange gains (losses)—net with respect to foreign exchange contracts and in Trading account profits (losses)—net with respect to interest rate contracts and other types of contracts. Embedded features that are not clearly and closely related to the host contracts and meet the definition of derivatives are separated from the host contracts and measured at fair value unless the contracts embedding the derivatives are measured at fair value in their entirety. Derivatives are also used to manage exposures to fluctuations in interest and foreign exchange rates arising from mismatches of asset Any difference that arises from gains or losses on hedging derivatives offsetting corresponding gains or losses on the hedged items, and gains and losses on derivatives attributable to the risks excluded from the assessment
Loans [Policy Text Block]	Loans— held-for-sale The MUFG Group classifies its loan portfolio into the following portfolio segments—Commercial, Residential, Card, MUFG Americas Holdings Corporation (“MUFG Americas Holdings Originated loans are considered impaired when, based on current information and events, it is probable that the MUFG Group will be unable to collect all the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Past due status is determined based on the contractual terms of the loan and the actual number of days since the last payment date, and is considered in determining impairment. Originated loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case loan-by-loan Originated loans are generally placed on nonaccrual status when substantial doubt exists as to the full and timely collection of either principal or interest, specifically when principal or interest is contractually past due one month or more with respect to loans within all classes of the Commercial segment, three months or more with respect to loans within the Card, MUFG Americas Holdings, and Krungsri segments, and six months or more with respect to loans within the Residential segment. A nonaccrual loan may be restored to an accrual status when interest and principal payments become current and management expects that the borrower will make future contractual payments as scheduled. When a loan is placed on nonaccrual status, interest accrued but not received is generally reversed against interest income. Cash receipts on nonaccrual loans, for which the ultimate collectibility of principal is uncertain, are applied as principal reductions; otherwise, such collections are credited to income. The MUFG Group modifies certain loans in conjunction with its loss-mitigation activities payments received from the borrower. The concessions granted vary by portfolio segment, by program, and by borrower Generally, accruing loans that are modified in a TDR remain as accruing loans subsequent to the modification, and nonaccrual loans remain as nonaccrual. However, if a nonaccrual loan has been modified as a TDR, the borrower is not delinquent under the modified terms, and demonstrates that its financial condition has improved, the MUFG Group may reclassify the loan to accrual status. This determination is generally performed at least once a year through a detailed internal credit rating review process. Once a nonaccrual loan is deemed to be a TDR, the MUFG Group will continue to designate the loan as a TDR even if the loan is reclassified to accrual status. A loan that has been modified into a TDR is considered to be impaired until it matures, is repaid, or is otherwise liquidated, regardless of whether the borrower performs under the modified terms. Because loans modified in TDRs are considered to be impaired, these loans are measured for impairment using the MUFG Group’s established asset-specific allowance methodology, which considers the expected default rates for the modified loans. See “ Allowance for Credit Losses” . In accordance with the guidance on loans and debt securities acquired with deteriorated credit quality, impaired loans acquired for which it is probable that the MUFG Group will be unable to collect all contractual receivables are initially recorded at the present value of amounts expected to be received. For these impaired loans, the related valuation allowances are not carried over or created initially. Accretable yield is limited to the excess of the investor’s estimate of undiscounted cash flows over the investor’s initial investment in the loan. Subsequent increases in cash flows expected to be collected are recognized prospectively through adjustment of the loan’s yield over its remaining life after reduction of any remaining allowance for credit losses for the loan established after its acquisition, if any, while any decrease in such cash flows below those initially expected at acquisition plus additional cash flows expected to be collected arising from changes in estimate after acquisition is recognized as an impairment.
Loan Securitization [Policy Text Block]	Loan Securitization
Allowance for Credit Losses [Policy Text Block]	Allowance for Credit Losses charge-off Key elements relating to the policies and discipline used in determining the allowance for credit losses are credit classification and the related borrower categorization process. The categorization is based on conditions that may affect the ability of borrowers to service their debt, taking into consideration current financial information, historical payment experience, credit documentation, public information, analyses of relevant industry segments or existing economic conditions. In determining the appropriate level of the allowance, the MUFG Group evaluates the probable loss by collateral value, historical loss experience, probability of insolvency and category of loan based on its type and characteristics. The MUFG Group calculates the allowance for credit losses over the loss emergence period that is a time between a loss occurring event and the subsequent confirmation of a loss. The MUFG Group updates these conditions and probable loss on a regular basis and upon the occurrence of unexpected change in the economic environment. The methodologies used to estimate the allowance and the charge-off Commercial segment In the Commercial segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment represents the impairment allowance determined in accordance with the guidance on accounting by creditors for the impairment of a loan. The factors considered by management in determining impairment are the internal credit rating assigned to each borrower which represents the borrower’s creditworthiness determined based on payment status, the number of delinquencies, and the probability of collecting principal and interest payments when due. The impairment of a loan is measured based on the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the loan’s observable market price, or the fair value of the collateral if the loan is collateral dependent. The formula allowance is applied to loans that are categorized as Normal or Close Watch, excluding The allocated allowance for large groups of smaller-balance homogeneous loans is established through a process that begins with estimates of probable losses inherent in the portfolio. These estimates are based upon various analyses, including historical delinquency and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans categorized as Legally/Virtually Bankrupt, the carrying amount of loans less estimated value of the collateral Residential segment In the Residential segment, the loans are comprised of smaller-balance homogeneous loans that are pooled by their internal credit ratings-based on the number of delinquencies. The loans in this segment are generally secured by collateral. Collateral values are based on internal valuation sources, and the allowance is determined for unsecured amounts. The allowance for the nondelinquent group of loans is determined based on historical loss experience. For delinquent groups of loans, the MUFG Group determines the allowance based on the probability of insolvency by the number of actual delinquencies and historical loss experience. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by discounting the estimated future cash flows using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the carrying amount of loans less estimated value of the collateral and guaranteed amount is generally considered uncollectible and charged off. Card segment In the Card segment, the loans are smaller-balance homogeneous loans that are pooled by their internal credit rating based on the number of delinquencies. The allowance for loans in this segment is generally determined based on the probability of insolvency by the number of actual delinquencies and historical loss experience. For calculating the allocated allowance for loans specifically identified for evaluation, impaired loans are aggregated for the purpose of measuring impairment using historical loss factors. Loans that have been modified into a TDR are treated as impaired loans, and the allowance for credit losses is determined using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. In relation to loans that are in past due status over a certain period of time and deemed uncollectible, the amount of loans is generally fully charged off. MUFG Americas Holdings segment In the MUFG Americas Holdings segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, the allocated allowance for large groups of smaller-balance homogeneous loans, and the unallocated allowance. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for consumer loans as well as for smaller balance commercial loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off The unallocated allowance represents an estimate of additional losses inherent in the loan portfolio and is composed of attribution factors, which are based upon management’s evaluation of various conditions that are not directly measured in the determination of the allocated allowance. The conditions used for consideration of the unallocated allowance at each balance sheet date include factors, such as existing general economic and business conditions affecting the key lending areas and products of the MUFG Group, credit quality trends and risk identification, collateral values, loan volumes, underwriting standards and concentrations, specific industry conditions, recent loss experience and the duration of the current business cycle. The MUFG Group reviews these conditions and has an internal discussion with senior credit officers on a quarterly basis. Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Commercial loans are generally considered uncollectible based on an evaluation of the financial condition of a borrower as well as the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Consumer loans are generally considered uncollectible based on past due status and the value of any collateral and, when considered to be uncollectible, loans are charged off in whole or in part. Krungsri segment In the Krungsri segment, the methodology for assessing the appropriateness of the allowance consists of several key elements, which include the allocated allowance for loans individually evaluated for impairment, the formula allowance, and the allocated allowance for large groups of smaller-balance homogeneous loans. The allocated allowance for loans individually evaluated for impairment is established for loans when management determines that the MUFG Group will be unable to collect all amounts due according to the contractual terms of the loan agreement, including interest payments. Impaired loans are carried at the lower of the recorded investment in the loan, the present value of expected future cash flows discounted at the loan’s effective rate, the loan’s observable market price, or the fair value of the collateral, if the loan is collateral dependent. The formula allowance is calculated by applying historical loss factors to outstanding loans. Historical loss factors are based on the historical loss experience and may be adjusted for significant factors that, in management’s judgment, affect the collectibility of the portfolio as of the balance sheet date. The allocated allowance for large groups of smaller-balance homogeneous loans is established for smaller balance loans such as housing loans, credit card loans, and personal loans. These loans are managed on a pool basis, and loss factors are based on expected net charge-off Loans that have been modified into a TDR are treated as impaired loans. For nonaccrual TDRs, the allowance for credit losses is provided for these loans using the discounted cash flow method, or based on the fair value of the collateral. For TDRs accounted for as accruing loans, the allowance for credit losses is determined by using the discounted cash flow method whereby the estimated future cash flows are discounted using the original effective interest rate of the loans prior to modification. Loans to customers are charged off when they are determined to be uncollectible considering the financial condition of a borrower.
Allowance for Off-balance Sheet Credit Instruments [Policy Text Block]	Allowance for Off-Balance Sheet Credit Instruments off-balance
Premises and Equipment [Policy Text Block]	Premises and Equipment Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 3 to 39 Maintenance, repairs and minor improvements are charged to operations as incurred. Major improvements are capitalized. Net gains or losses on dispositions of premises and equipment are included in Other non-interest Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of an asset to be held and used is measured by a comparison of the carrying amount to future undiscounted net cash flows expected to be generated by the asset. If an asset is considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value. For purposes of recognition and measurement of an impairment loss, a long-lived asset or assets are grouped with other assets and liabilities at the lowest level with independent and identifiable cash flows. Assets to be disposed of by sale are reported at the lower of the carrying amount or fair value less estimated cost to sell. Asset retirement obligations related to restoration of certain leased properties upon lease termination are recorded in Other liabilities with a corresponding increase in leasehold improvements. The amounts represent the present value of expected future cash flows associated with returning such leased properties to their original condition. The difference between the gross and present value of expected future cash flows is accreted over the life of the related leases as a non-interest
Goodwill [Policy Text Block]	Goodwill Goodwill arising from a business combination is not amortized but is tested at least annually for impairment. Goodwill is recorded at a designated reporting unit level for the purpose of assessing impairment. A reporting unit is an operating segment, or an identified business unit one level below an operating segment. An impairment loss is recognized to the extent that the carrying amount of a reporting unit exceeds its fair value, but not exceeding the total amount of goodwill allocated to that reporting unit.
Intangible Assets [Policy Text Block]	Intangible assets Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 9 to 16 Straight-line Customer relationships 3 to 27 Straight-line, Declining-balance Trade names 4 to 40 Straight-line Intangible assets having indefinite useful lives are not amortized but are subject to annual impairment tests. An impairment exists if the carrying value of an indefinite-lived intangible asset exceeds its fair value. For other intangible assets subject to amortization, an impairment is recognized if the carrying amount is not recoverable and the carrying amount exceeds the fair value of the intangible asset. The MUFG Group capitalizes certain costs associated with the acquisition or development of internal-use internal-use
Accrued Severance and Pension Liabilities [Policy Text Block]	Accrued Severance and Pension Liabilities employee benefits while other components of net pension benefit/cost are charged to Other non-interest
Long-term Debt [Policy Text Block]	Long-Term Debt
Obligations under Guarantees [Policy Text Block]	Obligations under Guarantees
Allowance for Repayment of Excess Interest [Policy Text Block]	Allowance for Repayment of Excess Interest
Fees and Commissions [Policy Text Block]	Fees and Commissions The following is an explanation of the MUFG Group’s key revenue from contracts with customers and the timing of its recognition. Fees and commissions on deposits consist of fees and commissions charged for transaction-based services such as usage of automated teller machines and withdrawal services, and for periodic account maintenance services. The MUFG Group’s performance obligation for transaction-based services is satisfied and the fees and commissions are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction, while the MUFG Group’s performance obligation for maintenance services is satisfied and the fees and commissions are recognized over the course of each month. Fees and commissions on remittances and transfers consist of fees and commissions charged for settlement transactions such as domestic fund remittances, including electronic banking transactions, and are recognized at the point in time when the MUFG Group’s performance under the terms of a contractual arrangement is completed, which is at the settlement of a transaction. Fees and commissions on foreign trading business consist of fees and commissions charged for fund collection and trade-related financing services related to foreign trading business, and are recognized in the period in which the related service is provided. If they arise from foreign trading business activities under which the customer consumes the related services at a point in time (e.g. foreign exchange fees), such fees are recognized at the same point in time. If they arise from foreign trading business activities under which the customer consumes the related services equally over the period of service (e.g. commercial letters of credit), such fees are recognized over the same period. Fees and commissions on credit card business consist of fees and commissions such as interchange income, royalty and other service charges from franchisees. Interchange income from the credit card business is recognized as processed transactions are settled through the associated payment networks, while royalty and other service charges related to the credit card business are recognized on a straight-line basis over the period of service. Fees and commissions on security-related services primarily consist of fees and commissions for sales and transfers of securities including investment funds, underwriting, brokerage and advisory services, arrangement fees on securitizations, and agency services for the calculation and payment of dividends. Fees and commissions on security-related services are recognized in the period in which the related service is provided. If they arise from security-related services under which the customer consumes the related services at a point in time (e.g. sales and transfers of securities are executed at the customer’s direction; underwritings of debt and equity securities or securitizations are completed at the trade date; advice is provided to the clients; and dividends are calculated and then paid to investors), such fees are recognized at the same point in time. If they arise from security-related services under which the customer consumes the related services equally over the period of service (e.g. retainer fees on M&A advisory fees), such fees are recognized over the same period. The advisory fees which are paid upon meeting certain performance goals (e.g. success fees on M&A advisory fees) are recognized at the point in time when the performance goals are met. Fees and commissions on administration and management services for investment funds primarily consist of fees and commissions earned from administrating and managing investment funds, including assets under management on behalf of clients. Such fees and commissions are recognized equally over the period of service at the amount calculated primarily based on the outstanding amount of each entrusted asset, the percentage of fees, and the extent of the service provided to administer the investment funds. Trust fees consist primarily of fees earned by fiduciary asset management and administration services for corporate pension plans and investment funds, and are recognized on an accrual basis, generally based on the volume of trust assets under management and/or the operating performance for the accounting period of each trust account. With respect to the trust accounts with a guarantee of trust principal, trust fees are determined based on the profits earned by individual trust accounts during the trust accounting period, less deductions, including provision for reserves, impairment for individual investments and dividends paid to beneficiary certificate holders. The trust fees for these trust accounts are accrued based on the amounts expected to be earned during the accounting period of each trust account. Guarantee fees consist of fees related to the guarantee business such as providing guarantees on residential mortgage loans and other loans, and are recognized over the contractual periods of the respective guarantees. Insurance commissions consist of commissions earned from third-party insurance companies for marketing and selling insurance products and for the maintenance of insurance contracts. The former is recognized at the point in time which the associated service is fulfilled as the insurance contract is established by the insurance company, while the latter is recognized over the insurance period. Fees and commissions on real estate business primarily consist of fees from real estate agent services, and are recognized in the period in which the related service is provided when assisting customers in the sales or purchase of real estate property. Other fees and commissions include various fees and commissions earned on services to customers which have performance obligations that the MUFG Group completes in order to recognize revenue. The primary portion includes non-refundable
Income Taxes [Policy Text Block]	Income Taxes The MUFG Group records net deferred tax assets to the extent these assets will more likely than not be realized. In making such determination, all available positive and negative evidence is considered, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies and recent financial operations. In the event the MUFG Group were to determine that it would be able to realize deferred tax assets in the future in excess of their net recorded amount, the MUFG Group would make an adjustment to the valuation allowance, which would reduce the provision for income taxes. Uncertain tax positions are recorded on the basis of a two-step more-likely-than-not
Free Distributions of Common Shares [Policy Text Block]	Free Distributions of Common Shares
Earnings Per Common Share [Policy Text Block]	Earnings per Common Share 22
Treasury Stock [Policy Text Block]	Treasury Stock
Comprehensive Income [Policy Text Block]	Comprehensive Income
Stock-Based Compensation [Policy Text Block]	Stock-Based Compensation committee members), corporate executives, executive officers and senior fellows (collectively, “officers”). Compensation costs under the Stock Option Plan are recognized based on the grant date fair value of the stock option (“Stock Acquisition Rights”) over the period during officers are required to provide service in accordance with the terms of the plan. MUFG and certain of its subsidiaries also have performance-based stock compensation plan (“the Board Incentive Plan”). The awards granted under the Board Incentive Plan are classified as either liability for the part of award which are provided to officers in cash or equity for the part of award which are provided to officers in the common shares of MUFG. Compensation costs are recognized over the requisite service period for the entire awards. For awards classified as liability, compensation costs are measured based on the fair value calculated by the quoted price of common shares of MUFG at the date of fiscal year-end
Accounting Changes [Policy Text Block]	Accounting Changes Recognition and Measurement of Financial Assets and Financial Liabilities Accounting Disclosure Framework Changes to the Disclosure Requirements for Fair Value Measurement Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and valuation processes for Level 3 fair value measurements. In addition, the guidance modifies disclosure requirements for investments in certain entities that calculate net asset value and modifies disclosure requirements related to measurement uncertainty. Lastly, the guidance adds disclosure requirements for changes in unrealized gains and losses for the period that are included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, and the guidance adds disclosure requirements related to the range and weighted Leases— right-of-use The MUFG Group adopted this guidance on April 1, 2019 and recorded ¥428 billion of right-of-use Leases previously described as capital leases are now referred as finance leases. As allowed by the guidance, the MUFG Group elected not to reassess the following at transition: whether existing contracts are or contain leases, and for existing leases, lease classification and initial direct costs. Premium Amortization on Purchased Callable Debt Securities Targeted Improvements to Accounting for Hedging Activities— exceeds its fair value, but not exceeding the total amount of goodwill allocated to that reporting unit. See Note 6 for details of the goodwill impairment. Reference Rate Reform Codification Improvements a ¥ 112 billion and ¥136 billion as of March 31, 20 19 20
Recently Issued Accounting Pronouncements [Policy Text Block]	Recently Issued Accounting Pronouncements Measurement of Credit Losses on Financial Instruments— available-for-sale In April 2019 and November 2019, the FASB issued guidance periods within those fiscal years. The MUFG Group adopted the guidance on April 1, 2020. It will result in an increase in the allowance for credit losses and the allowance for off-balance sheet credit instruments of approximately ¥ 380 – ¥ 450 billion and a decrease in retained earnings of approximately ¥ 270 – ¥ billion. The presentation of a range for the April 1, 2020 adoption impact is due to provisional estimation mainly in response to COVID-19 including macroeconomic variables Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract— internal-use internal-use internal-use capitalized-implementation-cost-related

Basis of Financial Statements_3

Basis of Financial Statements and Summary of Significant Accounting Policies [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Estimated Useful Lives of Premises and Equipment [Table Text Block]	Years Buildings 15 to 50 Equipment and furniture 2 to 20 Leasehold improvements 3 to 39
Useful Lives of Intangible Assets and Amortization Method by Major Class [Table Text Block]	Useful lives Amortization method Software 2 to 10 Straight-line Core deposit intangibles 9 to 16 Straight-line Customer relationships 3 to 27 Straight-line, Declining-balance Trade names 4 to 40 Straight-line

Business Developments _Text B_2

Business Developments [Text Block] (Tables)	12 Months Ended
Business Developments [Text Block] (Tables)	Mar. 31, 2020
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]
Business Developments [Line Items]
Estimated Fair Values of Assets Acquired and Liabilities Assumed [Table Text Block]	(in millions) Loans ¥ 1,086,638 Intangible assets (1) 146,899 Total assets 1,728,480 Deposits—Total deposits 915,075 Total liabilities 1,242,115 Note: (1) Intangible assets with a agents with a a
Pro Forma Statements of Income (Unaudited) [Table Text Block]	Fiscal years ended 2019 2020 (in millions) Statement of income data: Net interest income ¥ 130,540 ¥ 119,818 Non-interest 30,857 30,852 Net income attributable to Mitsubishi UFJ Financial Group 16,083 3,206
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member]
Business Developments [Line Items]
Pro Forma Statements of Income (Unaudited) [Table Text Block]	Fiscal years ended 2019 2020 (in millions) Statement of income data: Non-interest ¥ 77,323 ¥ 78,475 Net income attributable to Mitsubishi UFJ Financial Group 16,051 6,047
MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member]
Business Developments [Line Items]
Estimated Fair Values of Assets Acquired and Liabilities Assumed [Table Text Block]	(in millions) Loans ¥ 515,933 Total assets 522,797 Total liabilities 138
Pro Forma Statements of Income (Unaudited) [Table Text Block]	Fiscal years ended 2019 2020 (in millions) Statement of income data: Net interest income ¥ 4,825 ¥ 4,868 Non-interest 430 430 Net income attributable to Mitsubishi UFJ Financial Group 48 77

Investment Securities _Text B_2

Investment Securities [Text Block] (Tables)	12 Months Ended
Investment Securities [Text Block] (Tables)	Mar. 31, 2020
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities [Table Text Block]	At March 31, 2019: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,748,558 ¥ 330,115 ¥ 977 ¥ 24,077,696 Japanese prefectural and municipal bonds 2,203,978 22,593 5 2,226,566 Foreign government and official institution bonds 2,648,874 18,099 25,554 2,641,419 Corporate bonds 1,117,302 14,251 822 1,130,731 Residential mortgage-backed securities 1,635,220 1,469 21,338 1,615,351 Commercial mortgage-backed securities 132,996 310 2,351 130,955 Asset-backed securities 1,494,629 10,846 2,553 1,502,922 Other debt securities (1) 192,930 2,851 2,918 192,863 Total ¥ 33,174,487 ¥ 400,534 ¥ 56,518 ¥ 33,518,503 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,701 ¥ 41,619 ¥ — ¥ 1,142,320 Foreign government and official institution bonds 138,731 193 212 138,712 Residential mortgage-backed securities 910,990 1,209 21,202 (2) 890,997 Commercial mortgage-backed securities 160,267 1,903 2,032 (2) 160,138 Asset-backed securities 2,131,212 1,415 11,847 2,120,780 Total ¥ 4,441,901 ¥ 46,339 ¥ 35,293 ¥ 4,452,947 Notes: (1) Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity At March 31, 2020: Amortized Gross Gross Fair value (in millions) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 23,308,538 ¥ 185,302 ¥ 30,961 ¥ 23,462,879 Japanese prefectural and municipal bonds 2,938,743 16,279 2,202 2,952,820 Foreign government and official institution bonds 2,936,110 107,406 6,028 3,037,488 Corporate bonds 1,261,586 12,445 1,205 1,272,826 Residential mortgage-backed securities 1,460,641 3,083 4,331 1,459,393 Commercial mortgage-backed securities 379,234 6,110 3,089 382,255 Asset-backed securities 1,461,083 9,516 1,123 1,469,476 Other debt securities (1) 161,832 3,190 1,956 163,066 Total ¥ 33,907,767 ¥ 343,331 ¥ 50,895 ¥ 34,200,203 Held-to-maturity Japanese national government and Japanese government agency bonds ¥ 1,100,574 ¥ 29,856 ¥ — ¥ 1,130,430 Foreign government and official institution bonds 151,555 243 689 151,109 Residential mortgage-backed securities 737,242 10,478 3,012 (2) 744,708 Commercial mortgage-backed securities 146,039 2,993 317 (2) 148,715 Asset-backed securities 2,030,371 277 27,716 2,002,932 Total ¥ 4,165,781 ¥ 43,847 ¥ 31,734 ¥ 4,177,894 Notes: (1) Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds. (2) MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale Held-to-maturity
Amortized Cost and Fair Value by Contractual Maturity [Table Text Block]	Held-to-maturity Available-for-sale Amortized Fair value Fair value (in millions) Due in one year or less ¥ 24,013 ¥ 24,056 ¥ 11,827,106 Due from one year to five years 1,202,901 1,235,096 10,833,597 Due from five years to ten years 591,471 587,205 5,794,878 Due after ten years 2,347,396 2,331,537 5,744,622 Total ¥ 4,165,781 ¥ 4,177,894 ¥ 34,200,203
Investments by Length and Category in Continuous Loss Position [Table Text Block]	Less than 12 months 12 months or more Total At March 31, 2019: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 4,149,302 ¥ 976 ¥ 5,599 ¥ 1 ¥ 4,154,901 ¥ 977 39 Japanese prefectural and municipal bonds 12,772 5 — — 12,772 5 4 Foreign government and official institution bonds 397,718 1,125 1,160,671 24,429 1,558,389 25,554 179 Corporate bonds 163,615 776 79,758 46 243,373 822 92 Residential mortgage-backed securities 316,942 1,757 648,353 19,581 965,295 21,338 536 Commercial mortgage-backed securities 42,126 678 57,167 1,673 99,293 2,351 104 Asset-backed securities 164,738 2,553 — — 164,738 2,553 87 Other debt securities 77,660 549 37,027 2,369 114,687 2,918 38 Total ¥ 5,324,873 ¥ 8,419 ¥ 1,988,575 ¥ 48,099 ¥ 7,313,448 ¥ 56,518 1,079 Held-to-maturity Foreign government and official institution bonds ¥ — ¥ — ¥ 55,084 ¥ 212 ¥ 55,084 ¥ 212 10 Residential mortgage-backed securities 74,180 1,199 798,165 20,003 872,345 21,202 457 Commercial mortgage-backed securities 3,154 37 155,011 1,995 158,165 2,032 32 Asset-backed securities 1,423,048 10,196 241,233 1,651 1,664,281 11,847 102 Total ¥ 1,500,382 ¥ 11,432 ¥ 1,249,493 ¥ 23,861 ¥ 2,749,875 ¥ 35,293 601 Less than 12 months 12 months or more Total At March 31, 2020: Fair value Gross Fair value Gross Fair value Gross Number of (in millions, except number of securities) Available-for-sale Japanese national government and Japanese government agency bonds ¥ 11,781,600 ¥ 30,961 ¥ — ¥ — ¥ 11,781,600 ¥ 30,961 202 Japanese prefectural and municipal bonds 935,540 2,202 — — 935,540 2,202 340 Foreign government and official institution bonds 564,620 5,481 114,407 547 679,027 6,028 153 Corporate bonds 522,941 1,191 25,228 14 548,169 1,205 154 Residential mortgage-backed securities 114,057 530 388,064 3,801 502,121 4,331 402 Commercial mortgage-backed securities 182,887 3,087 1,304 2 184,191 3,089 39 Asset-backed securities 189,775 503 86,605 620 276,380 1,123 94 Other debt securities 53,070 132 30,657 1,824 83,727 1,956 24 Total ¥ 14,344,490 ¥ 44,087 ¥ 646,265 ¥ 6,808 ¥ 14,990,755 ¥ 50,895 1,408 Held-to-maturity Foreign government and official institution bonds ¥ 55,746 ¥ 689 ¥ — ¥ — ¥ 55,746 ¥ 689 9 Residential mortgage-backed securities 108,478 1,033 360,841 1,979 469,319 3,012 281 Commercial mortgage-backed securities 10,281 32 133,791 285 144,072 317 31 Asset-backed securities 637,201 8,536 1,259,720 19,180 1,896,921 27,716 77 Total ¥ 811,706 ¥ 10,290 ¥ 1,754,352 ¥ 21,444 ¥ 2,566,058 ¥ 31,734 398
Carrying Value of Nonmarketable Equity Securities [Table Text Block]	2019 2020 (in millions) Measurement alternative balance ¥ 563,733 ¥ 534,882
Related Adjustments for Nonmarketable Equity Securities [Table Text Block]	Fiscal years ended 2019 2020 (in millions) Measurement alternative impairment losses (1)(4) ¥ (2,292 ) ¥ (3,099 ) Measurement alternative downward changes for observable prices (1)(2)(3)(5) ¥ — ¥ (953 ) Measurement alternative upward changes for observable prices (1)(2)(3)(6) ¥ ¥ Notes: (1) Included in Investment securities gains (losses)—net. (2) Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer. (3) The MUFG Group applied measurement alternative downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities. (4) The cumulative impairment losses at March 31, 2019 and 2020 were ¥2,292 million and ¥5,007 million, respectively. (5) The cumulative downward changes for observable prices at March 31, 2019 and 2020 were nil and ¥953 million, respectively. (6) The cumulative upward changes for observable prices at March 31, 2019 and 2020 were ¥53,077 million and ¥34,466 million, respectively.
Marketable Equity Securities [Member]
Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities Still Held at the Reporting Date [Table Text Block]	Fiscal years ended 2019 2020 (in millions) Net losses recognized during the period (1) ¥ (278,746 ) ¥ (639,813 ) Less: Net losses recognized during the period on equity securities sold during the period (3,303 ) (37,541 ) Net unrealized losses recognized during the reporting period still held at the reporting date ¥ (275,443 ) ¥ (602,272 ) Note: (1) Included in Investment securities gains (losses)—net.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses [Text Block] (Tables)	12 Months Ended
Loans and Allowance for Credit Losses [Text Block] (Tables)	Mar. 31, 2020
Text Block [Abstract]
Loans by Domicile and Industry of Borrower Segment Classification [Table Text Block]	2019 2020 (in millions) Domestic: Manufacturing ¥ 11,153,996 ¥ 11,448,778 Construction 717,664 733,212 Real estate 11,706,419 12,054,671 Services 2,653,191 2,585,111 Wholesale and retail 7,643,397 7,504,561 Banks and other financial institutions (1) 5,213,020 5,161,093 Communication and information services 1,510,596 1,572,344 Other industries 8,756,483 8,673,871 Consumer 15,802,024 15,319,721 Total domestic 65,156,790 65,053,362 Foreign: Governments and official institutions 841,695 726,347 Banks and other financial institutions (1) 11,641,373 11,788,225 Commercial and industrial 31,951,169 32,565,030 Other 7,597,502 8,404,062 Total foreign 52,031,739 53,483,664 Unearned income, unamortized premiums—net and deferred loan fees—net (304,588 ) (350,287 ) Total (2) ¥ 116,883,941 ¥ 118,186,739 Notes: (1) Loans to so-called “non-bank Non-bank (2) The above table includes loans held for sale of ¥291,794 million and ¥344,790 million at March 31, 2019 and 2020, respectively.
Nonaccrual Loans by Class [Table Text Block]	2019 2020 (in millions) Commercial Domestic ¥ 272,777 ¥ 312,972 Manufacturing 65,896 93,776 Construction 9,813 8,484 Real estate 23,152 21,790 Services 26,188 51,195 Wholesale and retail 94,531 94,037 Banks and other financial institutions 898 994 Communication and information services 11,955 10,539 Other industries 25,406 20,234 Consumer 14,938 11,923 Foreign 111,002 127,001 Residential 68,499 63,998 Card 61,419 61,172 MUAH 46,549 35,840 Krungsri 127,424 149,732 Other — 27,754 Total (1) ¥ 687,670 ¥ 778,469 Note: (1) The above table does not include loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively, and loans acquired with deteriorated credit quality of ¥6,284 million and ¥25,427 million at March 31, 2019 and 2020, respectively.
Impaired Loans by Class [Table Text Block]	Recorded Loan Balance At March 31, 2019: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 560,474 ¥ 157,465 ¥ 717,939 ¥ 759,399 ¥ 227,004 Manufacturing 349,597 28,189 377,786 384,306 92,919 Construction 8,366 5,975 14,341 14,779 6,574 Real estate 20,848 29,961 50,809 55,943 5,704 Services 30,239 13,020 43,259 46,838 20,059 Wholesale and retail 118,253 45,620 163,873 175,714 84,503 Banks and other financial institutions 1,012 21 1,033 1,033 830 Communication and information services 8,794 6,929 15,723 16,587 6,817 Other industries 13,772 17,989 31,761 38,342 6,874 Consumer 9,593 9,761 19,354 25,857 2,724 Foreign 127,521 34,484 162,005 183,133 85,966 Loans acquired with deteriorated credit quality 8,136 — 8,136 14,990 5,450 Residential (4) 97,176 6,495 103,671 120,526 14,357 Card (4) 64,691 330 65,021 72,226 21,829 MUAH (4) 46,552 23,208 69,760 83,300 8,294 Krungsri (4) 57,066 26,193 83,259 90,377 28,254 Total (3) ¥ 961,616 ¥ 248,175 ¥ 1,209,791 ¥ 1,323,951 ¥ 391,154 Recorded Loan Balance At March 31, 2020: Requiring Not Requiring (1) Total (2) Unpaid Related (in millions) Commercial Domestic ¥ 598,737 ¥ 147,890 ¥ 746,627 ¥ 784,298 ¥ 268,070 Manufacturing 375,716 32,057 407,773 414,091 119,070 Construction 6,609 5,261 11,870 12,023 5,026 Real estate 20,739 28,928 49,667 55,303 6,649 Services 55,293 13,114 68,407 72,708 40,987 Wholesale and retail 113,288 38,897 152,185 160,508 80,996 Banks and other financial institutions 1,069 39 1,108 1,262 855 Communication and information services 7,971 5,808 13,779 14,698 6,009 Other industries 10,558 16,449 27,007 33,229 6,434 Consumer 7,494 7,337 14,831 20,476 2,044 Foreign 141,897 56,464 198,361 220,283 96,009 Loans acquired with deteriorated credit quality 12,906 — 12,906 19,947 4,767 Residential (4) 88,075 4,822 92,897 107,629 12,770 Card (4) 65,240 280 65,520 72,714 19,799 MUAH (4) 33,884 33,835 67,719 84,737 5,977 Krungsri ( 4) 68,126 30,833 98,959 106,265 30,198 Other (4) 22,749 1,091 23,840 26,091 6,152 Total (3) ¥ 1,031,614 ¥ 275,215 ¥ 1,306,829 ¥ 1,421,964 ¥ 443,742 Notes: (1) These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ original effective interest rate, loans’ observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan. (2) Included in impaired loans at March 31, 2019 and 2020 are accrual TDRs as follows: ¥497,013 million and ¥505,681 million—Commercial; ¥34,449 million and ¥28,450 million—Residential; ¥26,183 million and ¥25,492 million—Card; ¥33,155 million and ¥42,910 million—MUFG Americas Holdings; ¥26,851 million and ¥35,226 million—Krungsri; and nil and ¥8,401 million—Other, respectively. (3) In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively. (4) Impaired Loans for Residential, Card, MUAH, Krungsri and Other segments in the above table include loans acquired with deteriorated credit quality.
Average Recorded Loan Balance and Recognized Interest Income on Impaired Loans by Class [Table Text Block]	2018 2019 2020 Average Recognized Average Recognized Average Recognized (in millions) Commercial Domestic ¥ 918,093 ¥ 9,441 ¥ 766,847 ¥ 12,383 ¥ 726,794 ¥ 8,722 Manufacturing 472,081 3,787 387,725 6,057 387,470 4,085 Construction 19,465 281 15,721 291 13,093 218 Real estate 74,087 1,146 57,850 1,069 48,740 731 Services 59,916 794 48,945 1,044 58,704 759 Wholesale and retail 186,356 2,347 171,687 2,848 157,751 2,195 Banks and other financial institutions 1,729 8 1,330 8 1,094 6 Communication and information services 25,461 388 22,478 491 14,804 322 Other industries 50,377 215 39,178 234 28,345 170 Consumer 28,621 475 21,933 341 16,793 236 Foreign 209,297 4,244 159,999 3,127 174,831 3,013 Loans acquired with deteriorated credit quality 8,591 492 7,814 182 9,395 74 Residential 119,409 1,563 107,165 1,620 98,238 1,252 Card 69,831 1,993 66,187 1,614 65,270 1,241 MUAH 83,504 1,993 71,162 2,292 82,832 2,801 Krungsri 75,370 3,899 83,165 4,995 91,577 5,274 Other — — — — 11,854 494 Total ¥ 1,484,095 ¥ 23,625 ¥ 1,262,339 ¥ 26,213 1,260,791 ¥ ¥ 22,871
Roll-forward of Accrual TDRs and Other Impaired Loans [Table Text Block]	2018 2019 2020 (in millions) Accrual TDRs: Balance at beginning of fiscal year ¥ 819,819 ¥ 670,255 ¥ 617,651 Additions (new accrual TDR status) (1) 144,368 71,033 171,740 Transfers to other impaired loans (including nonaccrual TDRs) (25,122 ) (19,053 ) (39,646 ) Loans sold (39,378 ) (26 ) (11,220 ) Principal payments and other (229,432 ) (104,558 ) (92,365 ) Balance at end of fiscal year (1) ¥ 670,255 ¥ 617,651 ¥ 646,160 Other impaired loans (including nonaccrual TDRs): Balance at beginning of fiscal year ¥ 896,031 ¥ 660,868 ¥ 592,140 Additions (new other impaired loans (including nonaccrual TDRs) status) (1)(2) 281,275 222,003 373,091 Charge-off (98,355 ) (55,309 ) (52,935 ) Transfers to accrual TDRs (43,858 ) (22,110 ) (45,310 ) Loans sold (31,581 ) (26,022 ) (29,928 ) Principal payments and other (342,644 ) (187,290 ) (176,389 ) Balance at end of fiscal year (1) ¥ 660,868 ¥ 592,140 ¥ 660,669 Notes: (1) For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. For the fiscal year ended March 31, 2020, lease receivables of ¥3,647 million and ¥465 million in the Krungsri segment, and ¥68 million and nil in the Other segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥6,946 million and ¥3,810 million in the Krungsri segment, and ¥66 million and nil in the Other segment are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2020. (2) Included in the additions of other impaired loans for the fiscal years ended March 31, 2018, 2019 and 2020 are nonaccrual TDRs as follows: ¥12,002 million, ¥13,493 million and ¥14,685 million—Card; ¥12,799 million, ¥12,738 million and ¥15,135 million—MUFG Americas Holdings; ¥12,280 million, ¥10,519 million and ¥9,828 million—Krungsri; and nil, nil and ¥1,031 million—Other, respectively.
TDRs by Class [Table Text Block]	2018 2019 2020 Troubled Debt Restructurings Pre- Post- Pre- Post- Pre- Post- (in millions) Commercial (1)(3) Domestic ¥ 70,380 ¥ 69,021 ¥ 36,693 ¥ 36,693 ¥ 61,735 ¥ 61,735 Manufacturing 35,954 35,954 11,654 11,654 27,435 27,435 Construction 1,020 1,020 703 703 289 289 Real estate 1,269 1,269 948 948 2,714 2,714 Services 4,139 4,139 2,141 2,141 6,487 6,487 Wholesale and retail 16,280 14,921 19,315 19,315 20,813 20,813 Banks and other financial institutions 246 246 — — — — Communication and information services 9,643 9,643 268 268 376 376 Other industries 761 761 472 472 3,279 3,279 Consumer 1,068 1,068 1,192 1,192 342 342 Foreign 25,522 25,522 5,692 5,692 39,827 39,827 Loans acquired with deteriorated credit quality — — 50 50 10,786 10,786 Residential (1)(3) 9,763 9,763 7,379 7,379 5,137 5,137 Card (2)(3) 17,436 16,912 19,685 18,837 22,625 21,561 MUAH (2)(3) 40,578 38,224 19,837 19,837 33,782 33,564 Krungsri (2)(3) 24,015 23,929 24,392 24,330 31,238 31,209 Other (2)(3) — — — — 12,781 12,780 Total ¥ 187,694 ¥ 183,371 ¥ 113,728 ¥ 112,818 ¥ 217,911 ¥ 216,599 2018 2019 2020 Troubled Debt Restructurings Recorded Investment (in millions) Commercial (1)(3) Domestic ¥ 4,067 ¥ 11,002 ¥ 8,857 Manufacturing 839 312 3,094 Construction — 89 6 Real estate 10 — 73 Services 822 473 43 Wholesale and retail 2,231 1,713 5,421 Banks and other financial institutions — — — Communication and information services 140 8,365 9 Other industries — 50 123 Consumer 25 — 88 Foreign — — 2,337 Loans acquired with deteriorated credit quality — — — Residential (1)(3) 159 362 31 Card (2)(3) 4,191 3,442 3,320 MUAH (2)(3) 2,565 349 4,656 Krungsri (2)(3) 4,789 7,926 7,305 Other (2)(3) — — 15 Total ¥ 15,771 ¥ 23,081 ¥ 26,521 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings, Krungsri and Oth e (3) For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2020, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential, MUFG Americas Holdings and Krungsri segments and
Outstanding Recorded Investment Balances of TDRs by Class [Table Text Block]	2019 2020 (in millions) Commercial (1) Domestic ¥ 445,312 ¥ 433,783 Manufacturing 311,890 313,996 Construction 4,591 3,435 Real estate 27,657 27,877 Services 17,135 17,287 Wholesale and retail 69,350 58,148 Banks and other financial institutions 135 113 Communication and information services 3,780 3,244 Other industries 6,357 6,775 Consumer 4,417 2,908 Foreign 51,701 71,898 Residential (1) 34,449 28,450 Card (2) 65,021 65,520 MUAH (2) 48,128 62,151 Krungsri (2) 62,980 76,831 Other (2) — 9,525 Total ¥ 707,591 ¥ 748,158 Notes: (1) TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans. (2) TDRs for the Card, MUFG Americas Holdings, Krungsri and Other segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2019 and 2020 are nonaccrual TDRs as follows: ¥38,838 million and ¥40,028 million—Card; ¥14,973 million and ¥19,241 million—MUFG Americas Holdings; ¥31,069 million and ¥34,659 million—Krungsri; and nil and ¥1,058 million—Other, respectively.
Credit Quality Indicators of Loans by Class [Table Text Block]	At March 31, 2019: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,391,991 ¥ 1,242,075 ¥ 217,745 ¥ 50,851,811 Manufacturing 10,819,594 279,801 47,968 11,147,363 Construction 672,152 37,236 7,857 717,245 Real estate 11,403,613 222,791 22,515 11,648,919 Services 2,436,489 174,784 19,953 2,631,226 Wholesale and retail 7,240,801 329,249 68,736 7,638,786 Banks and other financial institutions 5,199,889 7,654 898 5,208,441 Communication and information services 1,465,652 34,542 10,172 1,510,366 Other industries 8,610,464 119,581 24,947 8,754,992 Consumer 1,543,337 36,437 14,699 1,594,473 Foreign 35,418,267 562,854 112,103 36,093,224 Loans acquired with deteriorated credit quality 11,622 10,833 3,790 26,245 Total ¥ 84,821,880 ¥ 1,815,762 ¥ 333,638 ¥ 86,971,280 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,661,794 ¥ 66,290 ¥ 13,728,084 Card ¥ 516,983 ¥ 61,599 ¥ 578,582 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,752,021 ¥ ¥ ¥ ¥ ¥ Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 5,682,245 ¥ 199,070 ¥ 129,222 ¥ 6,010,537 At March 31, 2020: Normal Close Likely to become Total (1) (in millions) Commercial Domestic ¥ 49,695,889 ¥ 1,186,044 ¥ 220,245 ¥ 51,102,178 Manufacturing 10,997,241 317,018 58,615 11,372,874 Construction 696,491 28,350 6,927 731,768 Real estate 11,790,467 190,972 20,080 12,001,519 Services 2,390,210 158,851 21,802 2,570,863 Wholesale and retail 7,124,098 301,965 71,778 7,497,841 Banks and other financial institutions 5,146,320 13,237 926 5,160,483 Communication and information services 1,530,887 32,366 8,880 1,572,133 Other industries 8,540,144 112,813 19,292 8,672,249 Consumer 1,480,031 30,472 11,945 1,522,448 Foreign 34,719,041 636,523 128,073 35,483,637 Loans acquired with deteriorated credit quality 8,255 9,739 18,978 36,972 Total ¥ 84,423,185 ¥ 1,832,306 ¥ 367,296 ¥ 86,622,787 Accrual Nonaccrual Total (1) (in millions) Residential ¥ 13,256,744 ¥ 61,746 ¥ 13,318,490 Card ¥ 504,357 ¥ 61,286 ¥ 565,643 Credit Quality Based on Credit Quality Based on Accrual Nonaccrual Pass Special Classified Total (1)(2) (in millions) MUAH ¥ 4,590,805 ¥ 15,119 ¥ 4,877,863 ¥ 87,648 ¥ 84,033 ¥ 9,655,468 Normal Special Substandard or Total (1) (in millions) Krungsri ¥ 6,513,615 ¥ 246,328 ¥ 151,647 ¥ 6,911,590 Accrual Nonaccrual Total (1) (in millions) Other ¥ 1,086,517 ¥ 31,376 ¥ 1,117,893 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥689 million and ¥365 million as of March 31, 2019 and 2020, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements.
Ages of Past Due Loans by Class [Table Text Block]	At March 31, 2019: 1-3 Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 11,551 ¥ 30,648 ¥ 42,199 ¥ 50,809,612 ¥ 50,851,811 ¥ 6,900 Manufacturing 1,597 3,036 4,633 11,142,730 11,147,363 — Construction 218 60 278 716,967 717,245 1 Real estate 2,034 4,256 6,290 11,642,629 11,648,919 2,524 Services 778 569 1,347 2,629,879 2,631,226 1 Wholesale and retail 2,791 2,390 5,181 7,633,605 7,638,786 62 Banks and other financial institutions — 21 21 5,208,420 5,208,441 — Communication and information services 411 758 1,169 1,509,197 1,510,366 — Other industries 365 13,037 13,402 8,741,590 8,754,992 — Consumer 3,357 6,521 9,878 1,584,595 1,594,473 4,312 Foreign 10,881 19,993 30,874 36,062,350 36,093,224 236 Residential 62,686 16,615 79,301 13,641,449 13,720,750 6,584 Card 17,203 30,568 47,771 527,421 575,192 — MUAH 28,696 10,827 39,523 9,557,501 9,597,024 2,287 Krungsri 126,313 106,777 233,090 5,771,541 6,004,631 — Total ¥ 257,330 ¥ 215,428 ¥ 472,758 ¥ 116,369,874 ¥ 116,842,632 ¥ 16,007 At March 31, 2020: 1-3 Greater Total Current Total (1) Recorded (in millions) Commercial Domestic ¥ 9,215 ¥ 26,971 ¥ 36,186 ¥ 51,065,992 ¥ 51,102,178 ¥ 4,720 Manufacturing 820 2,762 3,582 11,369,292 11,372,874 620 Construction 143 100 243 731,525 731,768 — Real estate 880 3,300 4,180 11,997,339 12,001,519 1,181 Services 812 908 1,720 2,569,143 2,570,863 5 Wholesale and retail 2,598 2,603 5,201 7,492,640 7,497,841 19 Banks and other financial institutions — 54 54 5,160,429 5,160,483 — Communication and information services 336 57 393 1,571,740 1,572,133 — Other industries 171 12,889 13,060 8,659,189 8,672,249 97 Consumer 3,455 4,298 7,753 1,514,695 1,522,448 2,798 Foreign 9,927 23,548 33,475 35,450,162 35,483,637 164 Residential 48,404 15,443 63,847 13,248,278 13,312,125 6,288 Card 14,735 29,997 44,732 518,008 562,740 — MUAH 31,052 14,435 45,487 9,603,339 9,648,826 2,101 Krungsri 160,253 129,186 289,439 6,616,104 6,905,543 — Other 16,442 24,348 40,790 1,069,186 1,109,976 — Total ¥ 290,028 ¥ 263,928 ¥ 553,956 ¥ 117,571,069 ¥ 118,125,025 ¥ 13,273 Note: (1) Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.
Changes in Allowance for Credit Losses by Portfolio Segment [Table Text Block]	Fiscal year ended March 31, 2018: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 900,686 ¥ 67,336 ¥ 30,165 ¥ 73,733 ¥ 110,268 ¥ 1,182,188 Provision for (reversal of) credit losses (297,401 ) (22,291 ) 23,422 (9,309 ) 64,732 (240,847 ) Charge-offs 134,807 3,838 22,696 14,701 56,067 232,109 Recoveries 24,913 1,339 1,228 6,140 17,490 51,110 Net charge-offs 109,894 2,499 21,468 8,561 38,577 180,999 Other (1) (2,293 ) — — (2,098 ) 8,173 3,782 Balance at end of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Fiscal year ended March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 491,098 ¥ 42,546 ¥ 32,119 ¥ 53,765 ¥ 144,596 ¥ 764,124 Provision for (reversal of) credit losses (43,850 ) (4,480 ) 23,809 9,277 49,574 34,330 Charge-offs 76,664 274 24,310 13,224 59,569 174,041 Recoveries 17,565 834 932 3,733 21,053 44,117 Net charge-offs 59,099 (560 ) 23,378 9,491 38,516 129,924 Other (1) 1,466 — — (970 ) (10,842 ) (10,346 ) Balance at end of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Fiscal year ended March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Balance at beginning of fiscal year ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ — ¥ 658,184 Provision for (reversal of) credit losses 153,782 (1,028 ) 26,542 30,825 70,023 41,569 321,713 Charge-offs 85,326 3,227 25,149 27,934 77,907 23,592 243,135 Recoveries 26,427 375 1,237 4,173 23,170 8,476 63,858 Net charge-offs 58,899 2,852 23,912 23,761 54,737 15,116 179,277 Other (1) (2,223 ) — — (650 ) 9,528 2,265 8,920 Balance at end of fiscal year ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Note: (1) Other is
Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment [Table Text Block]	At March 31, 2019: Commercial Residential Card MUAH Krungsri Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 312,970 ¥ 14,175 ¥ 21,829 ¥ 8,294 ¥ 28,254 ¥ 385,522 Collectively evaluated for impairment 63,366 23,413 10,708 44,282 116,529 258,298 Loans acquired with deteriorated credit quality (2) 13,279 1,038 13 5 29 14,364 Total ¥ 389,615 ¥ 38,626 ¥ 32,550 ¥ 52,581 ¥ 144,812 ¥ 658,184 Loans: Individually evaluated for impairment ¥ 879,944 ¥ 102,948 ¥ 64,752 ¥ 69,760 ¥ 83,259 ¥ 1,200,663 Collectively evaluated for impairment 86,065,091 13,617,802 510,440 9,527,264 5,921,372 115,641,969 Loans acquired with deteriorated credit quality (2) 26,245 7,334 3,390 11,228 5,906 54,103 Total (1) ¥ 86,971,280 ¥ 13,728,084 ¥ 578,582 ¥ 9,608,252 ¥ 6,010,537 ¥ 116,896,735 At March 31, 2020: Commercial Residential Card MUAH Krungsri Other Total (in millions) Allowance for credit losses: Individually evaluated for impairment ¥ 364,079 ¥ 12,651 ¥ 19,799 ¥ 5,977 ¥ 30,198 ¥ 5,073 ¥ 437,777 Collectively evaluated for impairment 108,100 21,130 15,369 53,013 139,401 22,566 359,579 Loans acquired with deteriorated credit quality (2) 10,096 965 12 5 27 1,079 12,184 Total ¥ 482,275 ¥ 34,746 ¥ 35,180 ¥ 58,995 ¥ 169,626 ¥ 28,718 ¥ 809,540 Loans: Individually evaluated for impairment ¥ 944,988 ¥ 92,448 ¥ 65,292 ¥ 67,719 ¥ 98,959 ¥ 17,512 ¥ 1,286,918 Collectively evaluated for impairment 85,640,827 13,219,677 497,448 9,581,107 6,806,584 1,092,464 116,838,107 Loans acquired with deteriorated credit quality (2) 36,972 6,365 2,903 7,007 6,047 7,917 67,211 Total (1) ¥ 86,622,787 ¥ 13,318,490 ¥ 565,643 ¥ 9,655,833 ¥ 6,911,590 ¥ 1,117,893 ¥ 118,192,236 Notes: (1) Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees. (2) Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.
Components of Investment in Direct Financing Leases [Table Text Block]	2019 (in millions) Minimum lease payments receivable ¥ 1,922,339 Estimated residual values of leased property 27,468 Less—unearned income (299,283 ) Net investment in direct financing leases ¥ 1,650,524

Premises and Equipment _Text _2

Premises and Equipment [Text Block] (Tables)	12 Months Ended
Premises and Equipment [Text Block] (Tables)	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Components of Premises and Equipment [Table Text Block]	2019 2020 (in millions) Land ¥ 362,742 ¥ 380,477 Buildings 829,606 782,367 Equipment and furniture 648,598 623,676 Leasehold improvements 305,281 310,957 Construction in progress 34,002 35,594 Total 2,180,229 2,133,071 Less accumulated depreciation 1,206,629 1,203,542 Premises and equipment-net ¥ 973,600 ¥ 929,529

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets [Text Block] (Tables)	12 Months Ended
Goodwill and Other Intangible Assets [Text Block] (Tables)	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Movement in Carrying Amount of Goodwill by Business Segment [Table Text Block]	Global Global Asset Global Total (in millions) Balance at March 31, 2018: Goodwill (2)(3) ¥ 107,237 ¥ 496,191 ¥ 27,724 ¥ 2,300 ¥ 633,452 Accumulated impairment losses (2) — (177,750 ) (14,368 ) — (192,118 ) 107,237 318,441 13,356 2,300 441,334 Foreign currency translation adjustments and other (1,898 ) (5,308 ) (237 ) — (7,443 ) Balance at March 31, 2019: Goodwill 105,339 490,883 27,487 2,300 626,009 Accumulated impairment losses — (177,750 ) (14,368 ) — (192,118 ) 105,339 313,133 13,119 2,300 433,891 Goodwill acquired during the fiscal year (1) 34,553 260,639 178,308 — 473,500 Impairment loss (32,868 ) (350,942 ) — — (383,810 ) Foreign currency translation adjustments and other (1,354 ) (12,877 ) 8,276 — (5,955 ) Balance at March 31, 2020: Goodwill 138,538 738,645 214,071 2,300 1,093,554 Accumulated impairment losses (32,868 ) (528,692 ) (14,368 ) — (575,928 ) ¥ 105,670 ¥ 209,953 ¥ 199,703 ¥ 2,300 ¥ 517,626 Notes: (1) See Note 2 for the goodwill acquired in connection with acquisitions. (2) Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group. (3) The balance as of March, 31 2018 reflected the organization change in 2018 appropriately and was erroneously disclosed. Such amount has been restated from the amount previously reported as follows: Global Corporate & Investment Banking Business Group Global Commercial Banking Business Group As previously reported As restated As previously reported As restated (in millions) Balance at March 31, 2018: Goodwill ¥ — ¥ 107,237 ¥ 603,428 ¥ 496,191 Foreign currency translation adjustments and other — (1,898 ) (7,206 ) (5,308 ) Balance at March 31, 2019: Goodwill — 105,339 596,222 490,883
Carrying Amount of Other Intangible Assets by Major Class [Table Text Block]	2019 2020 Gross Accumulated Net Gross Accumulated Net (in millions) Intangible assets subject to amortization: Software ¥ 2,703,413 ¥ 2,029,775 ¥ 673,638 ¥ 2,852,273 ¥ 2,096,635 ¥ 755,638 Customer relationships 387,936 246,526 141,410 567,886 264,636 303,250 Core deposit intangibles 126,796 88,643 38,153 174,802 100,022 74,780 Trade names 77,204 34,283 42,921 94,748 38,055 56,693 Other 9,601 4,220 5,381 17,374 5,769 11,605 Total ¥ 3,304,950 ¥ 2,403,447 901,503 ¥ 3,707,083 ¥ 2,505,117 1,201,966 Intangible assets not subject to amortization: Other (1) 25,693 37,560 Total ¥ 927,196 ¥ 1,239,526 Note: (1) Intangible assets not subject to amortization includes ¥17,431 million and ¥29,641 million of mortgage servicing rights accounted for at fair value at March 31, 2019 and 2020, respectively.
Estimated Aggregate Amortization Expense for Intangible Assets for Next Five Fiscal Years [Table Text Block]	(in millions) Fiscal year ending March 31: 2021 ¥ 263,056 2022 228,137 2023 188,358 2024 150,702 2025 108,504

Lease Transactions _Text Bloc_2

Lease Transactions [Text Block] (Tables)	12 Months Ended
Lease Transactions [Text Block] (Tables)	Mar. 31, 2020
Leases [Abstract]
Profit or Loss of Lease Transactions as a Lessee [Table Text Block]	2020 (in millions) Finance lease cost: Amortization of right-of-use ¥ 5,455 Interest on lease liabilities 460 Operating lease cost 99,939
Information of Lease Transactions as a Lessee [Table Text Block]	2020 (in millions) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from finance leases ¥ 482 Operating cash flows from operating leases 106,103 Financing cash flows from finance leases 7,090 Right-of-use 12,754 Right-of-use 46,482 Weighted-average remaining lease term: Finance leases 4.4 years Operating leases 9.5 years Weighted-average discount rate: Finance leases 0.99 % Operating leases 1.16 %
Maturities of Lease Liabilities as a Leasee [Table Text Block]	Finance Operating (in millions) 2021 ¥ 7,835 ¥ 107,270 2022 6,794 80,460 2023 4,755 57,057 2024 3,073 40,902 2025 1,304 35,827 2026 and thereafter 2,655 195,540 Total undiscounted cash flows 26,416 517,056 Difference between undiscounted and discounted cash flows (1,230 ) (34,243 ) Amount on balance sheet ¥ 25,186 ¥ 482,813
Profit or Loss of Lease Transactions as a Lessor [Table Text Block]	2020 (in millions) Direct f Finance income on net investment ¥ 119,010 Operating leases: Lease income 7,856 Total ¥ 126,866
Component of Direct Financing Lease Transactions [Table Text Block]	2020 (in millions) Lease receivables (undiscounted) ¥ 2,193,360 Adjustments: Discounted unguaranteed residual value 15,515 Initial direct cost on direct financing leases 29,562 Deferred selling profit (364,206 ) Net investment in direct financing leases ¥ 1,874,231
Maturity of the Lease Payment Receivables of Direct Financing Lease Transactions [Table Text Block]	Lease (in millions) 2021 ¥ 567,342 2022 485,810 2023 382,135 2024 295,263 2025 207,067 2026 and thereafter 255,743 Total undiscounted cash flows 2,193,360 Difference between undiscounted cash flows and the lease receivables recognized on balance sheet (319,129 ) Amount on balance sheet ¥ 1,874,231

Income Taxes _Text Block_ (Tabl

Income Taxes [Text Block] (Tables)	12 Months Ended
Income Taxes [Text Block] (Tables)	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income before Income Tax Expense by Jurisdiction [Table Text Block]	2018 2019 2020 (in millions) Domestic income ¥ 803,057 ¥ 228,018 ¥ 89,440 Foreign income 858,762 642,824 343,780 Total ¥ 1,661,819 ¥ 870,842 ¥ 433,220
Details of Current and Deferred Income Tax Expense (Benefit) [Table Text Block]	2018 2019 2020 (in millions) Current: Domestic ¥ 180,109 ¥ 57,303 ¥ 28,128 Foreign 107,119 123,730 147,344 Total 287,228 181,033 175,472 Deferred: Domestic 116,873 (32,746 ) (18,949 ) Foreign 3,722 (15,050 ) (42,018 ) Total 120,595 (47,796 ) (60,967 ) Income tax expense 407,823 133,237 114,505 Income tax expense (benefit) reported in Accumulated OCI relating to: Investment securities 120,588 15,590 (29,747 ) Debt valuation adjustments (960 ) 4,293 23,908 Derivatives qualifying for cash flow hedges (4,421 ) (1,845 ) 4,012 Defined benefit plans 50,774 (38,229 ) (57,685 ) Foreign currency translation adjustments (34,527 ) 15,148 (20,693 ) Total 131,454 (5,043 ) (80,205 ) Total ¥ 539,277 ¥ 128,194 ¥ 34,300
Reconciliation of Effective Income Tax Rate [Table Text Block]	2018 2019 Combined normal effective statutory tax rate 30.6 % 30.6 % 30.6 % Nondeductible expenses 0.2 0.5 1.2 Impairment of goodwill — — 26.1 Foreign tax credit and payments (1.7 ) (3.3 ) (9.2 ) Lower tax rates applicable to income of subsidiaries (0.4 ) (2.5 ) (3.2 ) Change in valuation allowance (3.0 ) (1.4 ) 7.9 Realization of previously unrecognized tax effects of subsidiaries — — (19.8 ) (1) Nontaxable dividends received (2.0 ) (9.1 ) (15.6 ) Undistributed earnings of subsidiaries 0.7 0.6 3.6 Tax and interest expense for uncertainty in income taxes 0.0 0.6 0.0 Noncontrolling interest income (loss) 0.1 0.2 (0.1 ) Effect of changes in tax laws (0.6 ) 0.0 — Expiration of loss carryforward 0.4 0.1 1.9 Other—net 0.2 (1.0 ) 3.0 Effective income tax rate 24.5 % 15.3 % 26.4 % Note: (1) In October 2019, a wholly owned subsidiary of the MUFG Group was sold. The sale resulted in the realization of tax benefits that were not previously recognized as deferred tax assets, resulting in a ¥85,588 million reduction of income tax expense and a 19.8% reduction in the effective tax rate for the fiscal year ended March 31, 2020.
Components of Net Deferred Tax Assets [Table Text Block]	2019 2020 (in millions) Deferred tax assets: Allowance for credit losses ¥ 301,222 ¥ 317,770 Operating loss carryforwards 177,143 94,326 Loans 691 2,022 Accrued liabilities and other 236,363 277,807 Premises and equipment, including sale-and-leaseback 158,144 150,116 Derivative financial instruments 101,118 96,761 Defined benefit plans 5,238 57,836 Obligations under operating leases — 133,812 Valuation allowance (218,191 ) (151,530 ) Total deferred tax assets 761,728 978,920 Deferred tax liabilities: Investment securities (including trading account assets at fair value under the fair value 911,483 788,614 Intangible assets 38,772 87,063 Lease transactions 65,115 54,349 Investments in subsidiaries and affiliates (1) 217,429 279,583 Right-of-use assets of operating leases — 106,995 Other (1) 63,272 90,653 Total deferred tax liabilities 1,296,071 1,407,257 Net deferred tax assets (liabilities) ¥ (534,343 ) ¥ (428,337 ) Note: (1) Certain reclassifications have been made to prior period
Operating Loss Carryforwards and Tax Credit Carryforwards [Table Text Block]	Operating loss Tax credit (in millions) Fiscal year ending March 31: 2021 ¥ 11,024 ¥ 12,534 2022 16,306 6,137 2023 5,867 219 2024 5,524 185 2025 81,967 168 2026 51,271 130 2027 and thereafter 25,770 47,943 No definite expiration date 30,908 5,044 Total ¥ 228,637 ¥ 72,360
Roll-forward of Unrecognized Tax Benefits [Table Text Block]	2018 2019 2020 (in millions) Balance at beginning of fiscal year ¥ 7,851 ¥ 12,917 ¥ 19,160 Gross amount of increases for current year’s tax positions 427 313 399 Gross amount of increases for prior years’ tax positions 6,642 8,836 212 Gross amount of decreases for prior years’ tax positions (455 ) (1,090 ) — Net amount of changes relating to settlements with tax authorities (1,074 ) — (81 ) Decreases due to lapse of applicable statutes of limitations (253 ) (1,540 ) (297 ) Foreign exchange translation and other (221 ) (276 ) (144 ) Balance at end of fiscal year ¥ 12,917 ¥ 19,160 ¥ 19,249
Roll-forward of Interest and Penalties Recognized [Table Text Block]	2018 2019 2020 (in millions) Balance at beginning of fiscal year ¥ 4,054 ¥ 4,564 ¥ 3,056 Total interest and penalties in the consolidated statements of income 694 (1,655 ) (398 ) Total cash settlements, foreign exchange translation and other (184 ) 147 (46 ) Balance at end of fiscal year ¥ 4,564 ¥ 3,056 ¥ 2,612
Status of Years under Audit or Open to Examination by Major Tax Jurisdictions [Table Text Block]	Jurisdiction Tax years Japan 2019 and forward United States—Federal 2016 and forward United States—California 2015 and forward Thailand 2012 and forward Indonesia 2017 and forward

Pledged Assets and Collateral_2

Pledged Assets and Collateral [Text Block] (Tables)	12 Months Ended
Pledged Assets and Collateral [Text Block] (Tables)	Mar. 31, 2020
Text Block [Abstract]
Assets Mortgaged Pledged or Otherwise Subject to Lien [Table Text Block]	2020 (in millions) Trading account securities ¥ 10,264,854 Investment securities 14,096,841 Loans 13,354,396 Other 34,590 Total ¥ 37,750,681
Pledged Assets Classified by Type of Liabilities [Table Text Block]	2020 (in millions) Deposits ¥ 134,704 Payables under repurchase agreements and securities lending transactions 15,286,574 Other short-term borrowings and long-term debt 22,312,888 Other 16,515 Total ¥ 37,750,681

Deposits _Text Block_ (Tables)

Deposits [Text Block] (Tables)	12 Months Ended
Deposits [Text Block] (Tables)	Mar. 31, 2020
Banking and Thrift [Abstract]
Time Deposits by Maturity [Table Text Block]	Domestic Foreign (in millions) Due in one year or less ¥ 31,655,230 ¥ 23,574,644 Due after one year through two years 4,522,580 722,461 Due after two years through three years 2,430,995 275,303 Due after three years through four years 546,578 112,962 Due after four years through five years 654,135 17,950 Due after five years 799,180 32,726 Total ¥ 40,608,698 ¥ 24,736,046

Call Money and Funds Purchase_2

Call Money and Funds Purchased [Text Block] (Tables)	12 Months Ended
Call Money and Funds Purchased [Text Block] (Tables)	Mar. 31, 2020
Text Block [Abstract]
Summary of Funds Transactions [Table Text Block]	2019 2020 (in millions, except percentages and days) Outstanding at end of fiscal year: Amount ¥ 2,450,320 ¥ 3,668,922 Principal range of maturities 1 day to 30 days 1 Weighted average interest rate 0.12 % 0.04 %

Due to Trust Account, Short-t_2

Due to Trust Account, Short-term Borrowings and Long-term Debt [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Summary of Due to Trust Account Transactions [Table Text Block]	2019 2020 (in millions, except percentages) Amount outstanding at end of fiscal year ¥ 2,735,952 ¥ 3,377,747 Weighted average interest rate on outstanding balance at end of fiscal year 0.00 % 0.00 %
Components of Other Short-term Borrowings [Table Text Block]	2019 2020 (in millions, except percentages) Domestic offices: Commercial paper ¥ 1,033,568 ¥ 1,160,758 Borrowings from the Bank of Japan 241,070 9,800,800 Borrowings from other financial institutions 227,482 191,453 Other 122,166 170,044 Total domestic offices 1,624,286 11,323,055 Foreign offices: Commercial paper 3,929,636 3,836,459 Borrowings from other financial institutions 967,901 631,502 Short-term debentures 68,492 24,009 Other 141,803 241,168 Total foreign offices 5,107,832 4,733,138 Total 6,732,118 16,056,193 Less unamortized discount 1,045 711 Other short-term borrowings—net ¥ 6,731,073 ¥ 16,055,482 Weighted average interest rate on outstanding balance at end of fiscal year 1.97 % 0.67 %
Components of Long-term Debt [Table Text Block]	2019 2020 (in millions) MUFG: Obligations under finance leases ¥ 1,725 ¥ 6,552 Unsubordinated debt (1) Fixed rate bonds, payable in US dollars, due 2021-2039, principally 2.19%-4.29% 2,949,022 3,864,822 Fixed rate bonds, payable in Euro, due 2021-2033, principally 0.34%-1.75% 301,124 408,825 Fixed rate bonds, payable in other currencies, due 2024-2029, principally 2.08%-4.05% (2) 21,257 28,382 Floating rate bonds, payable in US dollars, due 2021-2023, principally 1.70%-3.46% 765,188 734,254 Floating rate bonds, payable in Euro, due 2023, principally 0.13% 43,596 41,843 Floating rate bonds, payable in other currencies, due 2024, principally 2.17% (2) — 26,436 Total 4,080,187 5,104,562 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2024-2030, principally 0.37%-1.39% 618,925 685,663 Adjustable rate bonds, payable in Japanese yen, due 2025-2030, principally 0.29%-0.63% 890,359 1,043,336 Adjustable rate bonds, payable in Japanese yen, no stated maturity, principally 0.82%-3.52% 1,706,695 1,756,087 Adjustable rate borrowings, payable in Japanese yen, due 2025-2029, principally 0.30%-0.50% 32,500 47,500 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 0.85%-1.17% 45,960 66,649 Floating rate bonds, payable in Japanese yen, no stated maturity, principally 3.02% 3,500 3,500 Floating rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.57%-0.79% 86,000 86,000 Total 3,383,939 3,688,735 Total 7,465,851 8,799,849 MUFG Bank: Obligations under finance leases ¥ 7,704 ¥ 5,636 Obligation under sale-and-leaseback 40,732 — Un s (1) Fixed rate bonds, payable in Japanese yen, due 2020-2027, principally 0.36%-2.57% 234,500 141,700 Fixed rate bonds, payable in US dollars, due 2020-2050, principally 0.00%-4.70% 1,284,812 1,104,504 Fixed rate bonds, payable in Euro, due 2022-2037, principally 0.88%-2.06% 112,687 108,252 Fixed rate bonds, payable in other currencies, due 2021-2047, principally 0.00%-5.30% (2) 19,084 17,620 Fixed rate borrowings, payable in Japanese yen, due 2020-2028, principally 0.00%-0.25% 10,786,372 10,440,217 Fixed rate borrowings, payable in US dollars, due 2030, principally 2.93% — 8,367 Fixed rate borrowings, payable in other currencies, due 2030, principally 2.93% (2) 9,483 — Adjustable rate bonds, payable in US dollars, due 2030, principally 3.00% 1,110 — Floating rate borrowings, payable in US dollars, due 2020-2031, principally 0.79%-2.38% 1,008,949 897,170 Floating rate borrowings, payable in Euro, due 2021-2030, principally 0.00%-0.20% 15,382 102,123 Floating rate borrowings, payable in other currencies, due 2028, principally 3.23% (2) 5,240 — Total 13,477,619 12,819,953 Subordinated debt (1) Fixed rate bonds, payable in Japanese yen, due 2020-2031, principally 1.31%-2.91% 513,420 490,590 Fixed rate borrowings, payable in Japanese yen, due 2022-2035, principally 0.26%-2.24% 73,400 73,400 Adjustable rate borrowings, payable in Japanese yen, due 2025-2028, principally 0.38%-1.04% 20,000 12,000 Adjustable rate borrowings, payable in Japanese yen, no stated maturity, principally 2.67%-3.52% 355,000 13,500 Floating rate borrowings, payable in Japanese yen, due 2027, principally 0.14% 15,000 15,000 Total 976,820 604,490 Obligations under loan securitization transaction accounted for as secured borrowings due 2020-2080, principally 0.12%-6.14% 639,037 791,139 Total 15,141,912 14,221,218 2019 2020 (in millions) Other subsidiaries: Obligations under finance leases ¥ 13,107 ¥ 12,998 Un S (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2050, principally 0.00%-20.00% 1,291,537 940,691 Fixed rate borrowings, bonds and notes, payable in US dollars, due 2020-2037, principally 0.00%-26.00% 1,385,936 1,106,465 Fixed rate borrowings, bonds and notes, payable in Euro, due 2020-2026, principally 0.00%-1.61% 2,479 2,965 Fixed rate borrowings, bonds and notes, payable in Thai baht, due 2020-2026, principally 0.00%-7.15% 334,586 387,799 Fixed rate borrowings, bonds and notes, payable in other currencies, due 2020-2037, principally 0.00%-15.33% (2) 219,781 360,558 Floating/Adjustable rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2050, principally 0.00%-7.70% 1,425,387 1,259,427 Floating rate borrowings, bonds and notes, payable in US dollars, due 2020-2028, principally 0.00%-16.00% 244,253 378,217 Floating rate bonds and notes, payable in Euro, due 2020-2022, principally 0.00% — 835 Floating/Adjustable rate borrowings, bonds and notes, payable in other currencies, due 2020-2024, principally 0.00%-7.30% (2) 6,241 6,804 Total 4,910,200 4,443,761 Subordinated debt (1) Fixed rate borrowings, bonds and notes, payable in Japanese yen, due 2020-2030, principally 1.14%-2.61% 269,373 223,095 Fixed rate bonds and notes, payable in US dollars, due 2022-2027, principally 7.50%-9.90% 1,409 737 Fixed rate bonds and notes, payable in Thai baht, due 2020-2029, principally 3.40%-3.90% 143,212 220,756 Fixed rate bonds and notes, payable in other currencies, due 2021, principally 0.00% (2) 7,347 7,179 Adjustable rate borrowings, bonds and notes, payable in Japanese yen, no stated maturity, principally 2.83% 4,500 — Floating rate borrowing s 41,000 2,000 Floating rate bonds and notes, payable in US dollars, due 2020-2036, principally 3.59%-10.92% 5,172 4,575 Total 472,013 458,342 Obligations under loan securitization transaction accounted for as secured borrowings due 2021-2024, principally 0.25%-2.25% 2,813 6,453 Total 5,398,133 4,921,554 Total 28,005,896 27,942,621 Debt Isuance Cost ¥ (15,353 ) ¥ (15,858 ) Total ¥ 27,990,543 ¥ 27,926,763 Notes: (1) Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices. (2) Minor currencies, such as Australian dollar, British pound, Indonesian rupiah, Brazilian real, Russian ruble etc., excluding Japanese yen, US dollars, Euro and Thai baht, have been summarized into the “Other currencies” classification.
Summary of Subsequent Maturities of Long-term Debt [Table Text Block]	MUFG BK Other Total (in millions) Fiscal year ending March 31: 2021 ¥ 303,428 ¥ 8,550,560 ¥ 1,270,513 ¥ 10,124,501 2022 778,600 2,165,072 919,608 3,863,280 2023 876,475 637,647 1,059,402 2,573,524 2024 731,255 1,072,061 411,279 2,214,595 2025 719,364 292,304 267,980 1,279,648 2026 and thereafter 5,390,727 1,503,574 992,772 7,887,073 Total ¥ 8,799,849 ¥ 14,221,218 ¥ 4,921,554 ¥ 27,942,621

Severance Indemnities and Pen_2

Severance Indemnities and Pension Plans [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Components of Net Periodic Benefit Cost of Pension Benefits, SIPs and Other Benefits [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2020 2018 2019 2020 Pension Pension Pension Pension Other Pension Other Pension Other (in millions) Service cost—benefits earned during the fiscal year ¥ 47,064 ¥ 48,352 ¥ 49,194 ¥ 10,169 ¥ 676 ¥ 12,395 ¥ 525 ¥ 14,406 ¥ 366 Interest cost on projected benefit obligation 14,383 13,504 10,969 15,359 1,079 14,958 1,046 17,370 1,159 Expected return on plan assets (68,432 ) (74,270 ) (74,744 ) (32,110 ) (2,122 ) (33,266 ) (2,314 ) (31,382 ) (1,882 ) Amortization of net actuarial loss 7,309 731 5,641 8,847 1,124 9,993 707 8,685 1,162 Amortization of prior service cost (1,094 ) (1,210 ) (1,204 ) (3,090 ) (2,775 ) (3,039 ) (2,020 ) (2,633 ) (1,881 ) Loss (gain) on settlements and curtailment (4,394 ) (5,980 ) (2,366 ) 52 — 49 — 223 — Net periodic benefit cost (income) ¥ (5,164 ) ¥ (18,873 ) ¥ (12,510 ) ¥ (773 ) ¥ (2,018 ) ¥ 1,090 ¥ (2,056 ) ¥ 6,669 ¥ (1,076 )
Summary of Assumptions Used in Computation [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2018 2019 2020 2018 2019 2020 Pension Pension Pension Pension Other Pension Other Pension Other Weighted-average assumptions used: Discount rates in determining expense 0.82 % 0.76 % 0.61 % 3.52 % 3.61 % 3.19 % 3.27 % 3.80 % 3.87 % Discount rates in determining benefit obligation 0.76 0.61 0.63 3.38 3.43 3.87 3.99 3.05 2.96 Rates of increase in future compensation level for 3.23 3.21 3.21 4.65 — 4.65 — 5.01 — Rates of increase in future compensation level for determining benefit obligation 3.21 3.21 3.46 4.65 — 5.01 — 5.12 — Expected rates of return on plan assets 2.87 2.83 2.89 6.71 7.50 6.70 7.50 6.25 7.00
Assumed Health Care Cost Trend Rates and Effect of a One-percentage-point Change for Foreign Offices and Subsidiaries [Table Text Block]	MUAH Other than MUAH 2019 (1) 2020 (1) 2019 (1) 2020 (1) Initial trend rate 4.44 % 4.14 % 7.00 % 6.50 % Ultimate trend rate 3.94 % 3.77 % 4.50 % 4.50 % Year the rate reaches the ultimate trend rate 2027 2027 2027 2027 MUAH Other than MUAH One-percentage- One-percentage- One-percentage- One-percentage- (in millions) Effect on total of service and interest cost components ¥ 152 ¥ (128 ) ¥ 42 ¥ (33 ) Effect on postretirement benefit obligation 2,823 (2,394 ) 838 (665 ) Note: (1) Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2018 and 2019, respectively.
Combined Funded Status and Amounts Recognized in Consolidated Balance Sheets [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Non-contributory Non-contributory Pension Other Pension Other (in millions) Change in benefit obligation: Benefit obligation at beginning of fiscal year ¥ 1,821,794 ¥ 1,841,884 ¥ 502,056 ¥ 34,347 ¥ 469,080 ¥ 31,510 Service cost 48,352 49,194 12,395 525 14,406 366 Interest cost 13,504 10,969 14,958 1,046 17,370 1,159 Plan participants’ contributions — — 37 452 28 455 Acquisitions/ Divestitures (160 ) (94 ) (17 ) — 13,000 — Amendments — — 64 — 3,721 — Actuarial loss (gain) 43,527 (3,053 ) (28,466 ) (2,354 ) 58,831 1,648 Benefits paid (66,539 ) (66,771 ) (19,894 ) (2,221 ) (21,120 ) (2,326 ) Lump-sum (18,594 ) (24,224 ) (1,750 ) — (2,284 ) — Translation adjustments and other — — (10,303 ) (285 ) (6,019 ) (429 ) Benefit obligation at end of fiscal year 1,841,884 1,807,905 469,080 31,510 547,013 32,383 Change in plan assets: Fair value of plan assets at beginning of fiscal year 2,603,329 2,594,788 542,646 32,466 493,495 28,258 Actual return on plan assets 13,664 (123,802 ) (21,353 ) (1,948 ) 92,087 5,695 Employer contributions 44,427 28,653 3,117 102 2,887 186 Acquisitions/ Divestitures (93 ) (21 ) — — 791 — Plan participants’ contributions — — 37 452 28 455 Benefits paid (66,539 ) (66,771 ) (19,894 ) (2,221 ) (21,120 ) (2,326 ) Translation adjustments and other — — (11,058 ) (593 ) (8,660 ) (349 ) Fair value of plan assets at end of fiscal year 2,594,788 2,432,847 493,495 28,258 559,508 31,919 Amounts recognized in the consolidated balance sheets: Prepaid benefit cost ¥ 770,564 ¥ 643,520 ¥ 67,821 ¥ 1,372 ¥ 81,301 ¥ 4,378 Accrued benefit cost (17,660 ) (18,577 ) (43,406 ) (4,624 ) (68,806 ) (4,842 ) Net amount recognized ¥ 752,904 ¥ 624,943 ¥ 24,415 ¥ (3,252 ) ¥ 12,495 ¥ (464 )
Aggregated Accumulated Benefit Obligations [Table Text Block]	Domestic Foreign offices 2019 2020 2019 2020 (in millions) Aggregated accumulated benefit obligations ¥ 1,800,992 ¥ 1,773,042 ¥ 457,048 ¥ 523,078
Summary for Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Table Text Block]	Domestic Foreign offices 2019 2019 (in millions) Projected benefit obligations ¥ 23,108 ¥ 26,442 ¥ 63,273 ¥ 89,829 Accumulated benefit obligations 23,108 26,442 52,249 67,609 Fair value of plan assets 5,629 7,980 19,866 21,014
Amounts Recognized in Accumulated OCI [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss ¥ 245,037 ¥ 437,254 ¥ 126,238 ¥ 8,628 ¥ 114,167 ¥ 5,164 Prior service cost (5,459 ) (4,255 ) (14,536 ) (4,263 ) (7,875 ) (2,304 ) Gross amount recognized in 239,578 432,999 111,702 4,365 106,292 2,860 Taxes (115,816 ) (174,915 ) (29,875 ) (1,282 ) (27,974 ) (874 ) Net amount recognized in ¥ 123,762 ¥ 258,084 ¥ 81,827 ¥ 3,083 ¥ 78,318 ¥ 1,986
Amounts Recognized in OCI [Table Text Block]	Domestic subsidiaries Foreign offices and subsidiaries 2019 2020 2019 2020 Pension Pension Pension Other Pension Other (in millions) Net actuarial loss (gain) arising during the year ¥ 104,132 ¥ 195,492 ¥ 26,155 ¥ 1,908 ¥ (1,732 ) ¥ (2,166 ) Prior service cost arising during the year — — 65 — 3,722 — Losses (gains) due to amortization: Net actuarial loss (731 ) (5,641 ) (9,993 ) (707 ) (8,685 ) (1,162 ) Prior service cost 1,210 1,204 3,039 2,020 2,633 1,881 Curtailment and settlement 5,980 2,366 (49 ) — (223 ) — Foreign currency translation adjustments — — (1,399 ) (68 ) (1,125 ) (58 ) Total changes in Accumulated OCI ¥ 110,591 ¥ 193,421 ¥ 17,818 ¥ 3,153 ¥ (5,410 ) ¥ (1,505 )
Weighted-average Target Asset Allocation of Plan Assets for Pension Benefits and Other Benefits [Table Text Block]	Domestic Foreign offices Asset category Pension Pension Other Japanese equity securities 35.9 % 0.4 % — % Japanese debt securities 33.6 — — Non-Japanese 15.0 49.2 70.0 Non-Japanese 10.4 38.3 30.0 Real estate 1.4 10.4 — Short-term assets 3.7 1.7 — Total 100.0 % 100.0 % 100.0 %
Estimated Future Benefit Payments [Table Text Block]	Domestic Foreign offices Pension Pension Other (in millions) Fiscal year ending March 31: 2021 ¥ 83,009 ¥ 21,368 ¥ 2,023 2022 82,073 22,901 2,075 2023 82,115 23,747 2,111 2024 81,988 24,893 2,125 2025 81,902 25,614 2,089 Thereafter (2026-2030) 397,860 165,065 9,040
Pension Benefits [Member]
Fair Values of Certain Investments Valued at Net Asset per Share (or Its Equivalent) [Table Text Block]	Domestic subsidiaries Foreign offices and Assets category 2019 2019 2020 (in millions) Japanese pooled funds: Japanese marketable equity securities ¥ 109,915 ¥ 125,218 ¥ — ¥ — Japanese debt securities 184,121 212,727 — — Non-Japanese 162,901 146,796 — — Non-Japanese 155,792 169,978 — — Other 134,306 100,798 — — Total pooled funds 747,035 755,517 — — Other investment funds 525,083 (1) 514,726 (1) 241,559 (2) 144,904 (2) Total ¥ 1,272,118 ¥ 1,270,243 ¥ 241,559 ¥ 144,904 Notes: (1) Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019 and ¥486,496 million and ¥13,891 million, respectively, at March 31, 2020. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of million, respectively, at March 31, 2019 and million, respectively, at March 31, 2020. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Fair Value of Each Major Category of Plan Assets [Table Text Block]	At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 At March 31, 2020 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 147,926 ¥ — ¥ — ¥ 147,926 ¥ — ¥ — ¥ — ¥ — Non-Japanese — — — — 42,135 5,185 — 47,320 Other debt securities 7,014 12,113 325 19,452 — 105,096 — 105,096 Japanese marketable equity securities 690,741 — — 690,741 — — — — Non-Japanese 47,655 235 — 47,890 26,981 616 — 27,597 Other investment funds — — — — 81,803 150,121 — 231,924 (2) Japanese general account of life insurance companies (1) — 217,898 — 217,898 — — — — Other investments 6,547 32,150 — 38,697 480 1,937 250 2,667 Total ¥ 899,883 ¥ 262,396 ¥ 325 ¥ 1,162,604 ¥ 151,399 ¥ 262,955 ¥ 250 ¥ 414,604 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2018 to March 31, 2019 and 1.24% from April 1, 2019 to March 31, 2020. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and common collective funds of respectively, which were held by MUFG Americas Holdings at December 31, 2018 and million, respectively, at December 31, 2019. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.
Foreign Offices and Subsidiaries [Member] \| Pension Benefits and SIPs [Member]
Fair Value of Each Major Category of Plan Assets [Table Text Block]	At March 31, 2019 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 146,060 ¥ — ¥ — ¥ 146,060 ¥ — ¥ — ¥ — ¥ — Non-Japanese 8,570 656 — 9,226 38,687 4,615 — 43,302 Other debt securities 109 3,698 1,030 4,837 — 100,462 — 100,462 Japanese marketable equity securities 855,353 — — 855,353 — — — — Non-Japanese 64,957 234 — 65,191 20,569 652 — 21,221 Other investment funds — — — — 73,286 9,044 — 82,330 (2) Japanese general account of life insurance companies (1) — 222,460 — 222,460 — — — — Other investments 917 18,626 — 19,543 18 4,415 188 4,621 Total ¥ 1,075,966 ¥ 245,674 ¥ 1,030 ¥ 1,322,670 ¥ 132,560 ¥ 119,188 ¥ 188 ¥ 251,936 At March 31, 2020 Domestic subsidiaries Foreign offices and subsidiaries Assets category Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Japanese government bonds ¥ 147,926 ¥ — ¥ — ¥ 147,926 ¥ — ¥ — ¥ — ¥ — Non-Japanese — — — — 42,135 5,185 — 47,320 Other debt securities 7,014 12,113 325 19,452 — 105,096 — 105,096 Japanese marketable equity securities 690,741 — — 690,741 — — — — Non-Japanese 47,655 235 — 47,890 26,981 616 — 27,597 Other investment funds — — — — 81,803 150,121 — 231,924 (2) Japanese general account of life insurance companies (1) — 217,898 — 217,898 — — — — Other investments 6,547 32,150 — 38,697 480 1,937 250 2,667 Total ¥ 899,883 ¥ 262,396 ¥ 325 ¥ 1,162,604 ¥ 151,399 ¥ 262,955 ¥ 250 ¥ 414,604 Notes: (1) “Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2018 to March 31, 2019 and 1.24% from April 1, 2019 to March 31, 2020. (2) Other investment funds of the foreign offices and subsidiaries include mutual funds and common collective funds of respectively, which were held by MUFG Americas Holdings at December 31, 2018 and million, respectively, at December 31, 2019. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.

Other Assets and Liabilities _2

Other Assets and Liabilities [Text Block] (Tables)	12 Months Ended
Other Assets and Liabilities [Text Block] (Tables)	Mar. 31, 2020
Major Components of Other Assets and Liabilities [Table Text Block]	2019 2020 (in millions) Other assets: Accounts receivable: Receivables from brokers, dealers and customers for securities transactions ¥ 1,141,075 ¥ 1,191,690 Other 1,394,794 1,212,511 Investments in equity method investees 2,487,389 2,421,154 Prepaid benefit cost (Note 13) 839,757 729,199 Cash collateral pledged for derivative transactions (Note 9) 1,276,897 1,696,108 Cash collateral for the use of Bank of Japan’s settlement infrastructure 911,528 965,546 Accrued interest (1) 359,648 308,448 Deferred tax assets (Note 8) (1) 89,719 113,031 Right-of-use — 393,435 Other 2,990,462 4,077,577 Total ¥ 11,491,269 ¥ 13,108,699 Other liabilities: Accounts payable: Payables to brokers, dealers and customers for securities transactions ¥ 1,289,672 ¥ 1,078,653 Other 1,308,733 1,251,260 Obligations to return securities received as collateral (Notes 15, 16 (1) 3,087,026 4,806,171 Accrued interest (1) 214,735 187,096 Deferred tax liabilities (Note 8) 624,062 541,368 Allowance for off-balance 119,307 56,995 Accrued benefit cost (Note 13) 65,690 92,225 Guarantees and indemnifications 45,346 39,601 Cash collateral received for derivative transactions (Note 9) 844,234 1,125,305 Obligations under operating leases (Note 7) — 482,813 Accrued and other liabilities 3,061,462 3,562,359 Total ¥ 10,660,267 ¥ 13,223,846 Note: (1) Certain reclassifications have been made to prior period to confirm to the current presentation.
Morgan Stanley [Member]
Summarized Financial Information [Table Text Block]	2019 2020 (in billions) Trading assets ¥ 29,392 ¥ 29,484 Securities purchased under agreements to resell 10,718 11,405 Securities borrowed 15,416 7,868 Total assets 97,223 103,149 Deposits 19,948 25,601 Customer and other payables 21,431 21,556 Borrowings 21,165 21,206 Total liabilities 88,134 93,656 Noncontrolling interests 130 149 2018 2019 2020 (in billions) Net revenues ¥ 4,354 ¥ 4,365 ¥ 4,415 Total non-interest 3,133 3,170 3,275 Income from continuing operations before income taxes 1,221 1,195 1,140 Net income applicable to Morgan Stanley 759 944 903
Equity Method Investees Other than Morgan Stanley [Member]
Summarized Financial Information [Table Text Block]	2019 2020 (in billions) Net loans ¥ 15,772 ¥ 15,190 Total assets 28,910 29,255 Deposits 9,103 8,898 Total liabilities 23,423 24,025 Noncontrolling interests 1,135 1,005 2018 2019 2020 (in billions) Total interest income ¥ 901 ¥ 1,036 ¥ 1,093 Total interest expense 329 430 419 Net interest income 572 606 674 Provision for credit losses 136 157 171 Income before income tax expense 337 205 366 Net income 229 135 285

Offsetting of Derivatives, Re_2

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Summary of Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions [Table Text Block]	At March 31, 2019 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 13,205 ¥ — ¥ 13,205 ¥ (10,752 ) ¥ (590 ) ¥ 1,863 Receivables under resale agreements 13,885 (2,910 ) 10,975 (9,793 ) (20 ) 1,162 Receivables under securities borrowing transactions 2,759 — 2,759 (2,693 ) — 66 Total ¥ 29,849 ¥ (2,910 ) ¥ 26,939 ¥ (23,238 ) ¥ (610 ) ¥ 3,091 Financial liabilities: Derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ (10,671 ) ¥ (933 ) ¥ 1,106 Payables under repurchase agreements 28,125 (2,900 ) 25,225 (24,930 ) (15 ) 280 Payables under securities lending transactions 913 — 913 (880 ) — 33 Obligations to return securities received as collateral 3,087 — 3,087 (1,244 ) — 1,843 Total ¥ 44,835 ¥ (2,900 ) ¥ 41,935 ¥ (37,725 ) ¥ (948 ) ¥ 3,262 At March 31, 2020 Gross amounts of Gross amounts Net amounts Gross amounts not offset in Net amounts Financial Cash collateral (in billions) Financial assets: Derivative assets ¥ 14,958 ¥ — ¥ 14,958 ¥ (11,282 ) ¥ (874 ) ¥ 2,802 Receivables under resale agreements 25,884 (1,888 ) 23,996 (23,195 ) (21 ) 780 Receivables under securities borrowing transactions 3,444 — 3,444 (3,336 ) — 108 Total ¥ 44,286 ¥ (1,888 ) ¥ 42,398 ¥ (37,813 ) ¥ (895 ) ¥ 3,690 Financial liabilities: Derivative liabilities ¥ 14,034 ¥ — ¥ 14,034 ¥ (11,296 ) ¥ (1,140 ) ¥ 1,598 Payables under repurchase agreements 33,733 (1,883 ) 31,850 (31,569 ) (34 ) 247 Payables under securities lending transactions 1,017 — 1,017 (986 ) — 31 Obligations to return securities received as collateral 4,806 — 4,806 (1,966 ) — 2,840 Total ¥ 53,590 ¥ (1,883 ) ¥ 51,707 ¥ (45,817 ) ¥ (1,174 ) ¥ 4,716

Repurchase Agreements, and Se_2

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged [Table Text Block]	March 31, 2019 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 3,892 ¥ 18,586 ¥ 2,824 ¥ 2,823 ¥ 28,125 Payables under securities lending transactions 913 — — — 913 Obligations to return securities received as collateral 2,572 396 117 2 3,087 Total ¥ 7,377 ¥ 18,982 ¥ 2,941 ¥ 2,825 ¥ 32,125 March 31, 2020 Remaining Contractual Maturity Overnight 30 days 31-90 Over Total (in billions) Payables under repurchase agreements ¥ 9,685 ¥ 16,608 ¥ 4,496 ¥ 2,944 ¥ 33,733 Payables under securities lending transactions 934 64 19 — 1,017 Obligations to return securities received as collateral 3,856 599 276 75 4,806 Total ¥ 14,475 ¥ 17,271 ¥ 4,791 ¥ 3,019 ¥ 39,556
Secured Borrowing by the Class of Collateral Pledged [Table Text Block]	March 31, 2019 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 8,306 ¥ 21 ¥ 856 ¥ 9,183 Foreign government and official institution bonds 14,291 — 1,286 15,577 Corporate bonds 705 — 172 877 Residential mortgage-backed securities 4,369 — — 4,369 Other debt securities 238 — — 238 Marketable equity securities 200 892 772 1,864 Other 16 — 1 17 Total ¥ 28,125 ¥ 913 ¥ 3,087 ¥ 32,125 March 31, 2020 Payables under Payables under Obligations Total (in billions) Japanese national government and Japanese government agency bonds ¥ 10,687 ¥ 38 ¥ 2,241 ¥ 12,966 Foreign government and official institution bonds 17,326 57 873 18,256 Corporate bonds 784 — 183 967 Residential mortgage-backed securities 4,248 — 10 4,258 Other debt securities 157 — 2 159 Marketable equity securities 506 914 1,497 2,917 Other 25 8 — 33 Total ¥ 33,733 ¥ 1,017 ¥ 4,806 ¥ 39,556

Common Stock and Capital Surp_2

Common Stock and Capital Surplus [Text Block] (Tables)	12 Months Ended
Common Stock and Capital Surplus [Text Block] (Tables)	Mar. 31, 2020
Common Stock [Member]
Number of Shares Issued and Outstanding [Table Text Block]	2018 2019 2020 (shares) Balance at beginning of fiscal year 14,168,853,820 13,900,028,020 13,667,770,520 Retirement of shares of common stock (268,825,800 ) (232,257,500 ) (85,775,400 ) Balance at end of fiscal year 13,900,028,020 13,667,770,520 13,581,995,120

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Changes in Accumulated OCI, Net of Tax and Net of Noncontrolling Interests [Table Text Block]	2018 2019 2020 (in millions) Accumulated other comprehensive income (loss), net of taxes: Net unrealized gains (losses) on investment securities (1) Balance at beginning of fiscal year ¥ 2,032,807 ¥ 2,270,346 ¥ (369,369 ) Net change during the fiscal year 244,249 60,616 24,584 Effect of adopting new guidance by a foreign affiliated company 118 — — Effect of adopting new guidance on reclassification on certain tax effects (6,828 ) — — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities ( Note 1) — (2,700,331 ) — Balance at end of fiscal year ¥ 2,270,346 ¥ (369,369 ) ¥ (344,785 ) Net debt valuation adjustments: Balance at beginning of fiscal year ¥ (10,632 ) ¥ (16,488 ) ¥ (8,670 ) Net change during the fiscal year (2,178 ) 9,729 54,172 Effect of adopting new guidance on reclassification on certain tax effects (3,678 ) — — Effect of adopting new guidance on recognition and measurement of financial assets and financial liabilities (Note 1) — (1,911 ) — Balance at end of fiscal year ¥ (16,488 ) ¥ (8,670 ) ¥ 45,502 Net unrealized losses on derivatives qualifying for cash flow hedges: Balance at beginning of fiscal year ¥ (8,729 ) ¥ (19,250 ) ¥ (24,140 ) Net change during the fiscal year (7,025 ) (4,890 ) 10,797 Effect of adopting new guidance on reclassification on certain tax effects (3,496 ) — — Balance at end of fiscal year ¥ (19,250 ) ¥ (24,140 ) ¥ (13,343 ) Defined benefit plans: Balance at beginning of fiscal year ¥ (214,062 ) ¥ (119,593 ) ¥ (208,273 ) Net change during the fiscal year 109,012 (88,680 ) (129,645 ) Effect of adopting new guidance on reclassification on certain tax effects (14,543 ) — — Balance at end of fiscal year ¥ (119,593 ) ¥ (208,273 ) ¥ (337,918 ) Foreign currency translation adjustments: Balance at beginning of fiscal year ¥ 482,039 ¥ 362,300 ¥ 326,183 Net change during the fiscal year (119,213 ) (36,117 ) (96,056 ) Effect of adopting new guidance on reclassification on certain tax effects (526 ) — — Balance at end of fiscal year ¥ 362,300 ¥ 326,183 ¥ 230,127 Balance at end of fiscal year ¥ 2,477,315 ¥ (284,269 ) ¥ (420,417 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020.
Before Tax and Net of Tax Changes in Each Component of Accumulated OCI [Table Text Block]	2018 2019 2020 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Net unrealized gains (losses) on investment securities: Net unrealized gains on investment securities (1) ¥ 631,154 ¥ (204,916 ) ¥ 426,238 ¥ 132,723 ¥ (24,690 ) ¥ 108,033 ¥ 100,974 ¥ (2,260 ) ¥ 98,714 Reclassification adjustment for gains included in net income before attribution of noncontrolling interests (280,258 ) 84,328 (195,930 ) (28,953 ) 9,100 (19,853 ) (107,102 ) 32,007 (75,095 ) Net change 350,896 (120,588 ) 230,308 103,770 (15,590 ) 88,180 (6,128 ) 29,747 23,619 Net unrealized gains (losses) on investment securities attributable to noncontrolling interests (13,941 ) 27,564 (965 ) Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group 244,249 60,616 24,584 Net debt valuation adjustments: Net debt valuation (3,555 ) 1,088 (2,467 ) 13,006 (3,982 ) 9,024 77,765 (23,812 ) 53,953 Reclassification adjustment for losses included in net income before attribution of noncontrolling interests 417 (128 ) 289 1,016 (311 ) 705 315 (96 ) 219 Net change (3,138 ) 960 (2,178 ) 14,022 (4,293 ) 9,729 78,080 (23,908 ) 54,172 Net debt valuation adjustments attributable to noncontrolling interests — — — Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group (2,178 ) 9,729 54,172 Net unrealized gains (losses) on derivatives qualifying for cash flow hedges: Net unrealized gains (losses) on derivatives qualifying for cash flow hedges (3,430 ) 1,571 (1,859 ) (10,397 ) 2,825 (7,572 ) 1,375 (560 ) 815 Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (8,016 ) 2,850 (5,166 ) 3,662 (980 ) 2,682 13,279 (3,452 ) 9,827 Net change (11,446 ) 4,421 (7,025 ) (6,735 ) 1,845 (4,890 ) 14,654 (4,012 ) 10,642 Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests — — (155 ) Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group (7,025 ) (4,890 ) 10,797 2018 2019 2020 Before tax Tax Net of tax Before tax Tax Net of tax Before tax Tax Net of tax (in millions) Defined benefit plans: Defined benefit plans 154,708 (48,537 ) 106,171 (126,001 ) 37,655 (88,346 ) (195,851 ) 59,426 (136,425 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests 5,904 (2,237 ) 3,667 (1,168 ) 574 (594 ) 6,643 (1,741 ) 4,902 Net change 160,612 (50,774 ) 109,838 (127,169 ) 38,229 (88,940 ) (189,208 ) 57,685 (131,523 ) Defined benefit plans attributable to noncontrolling interests 826 (260 ) (1,878 ) Defined benefit plans attributable to Mitsubishi UFJ Financial Group 109,012 (88,680 ) (129,645 ) Foreign currency translation adjustments: Foreign currency translation adjustments (137,811 ) 32,767 (105,044 ) (18,062 ) (17,932 ) (35,994 ) (99,520 ) 19,588 (79,932 ) Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests (1,494 ) 1,760 266 (9,002 ) 2,784 (6,218 ) (2,238 ) 1,105 (1,133 ) Net change (139,305 ) 34,527 (104,778 ) (27,064 ) (15,148 ) (42,212 ) (101,758 ) 20,693 (81,065 ) Foreign currency translation adjustments attributable to noncontrolling interests 14,435 (6,095 ) 14,991 Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group (119,213 ) (36,117 ) (96,056 ) Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group ¥ 224,845 ¥ (59,342 ) ¥ (136,148 ) Note: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020.
Reclassification of Significant Items out of Accumulated OCI [Table Text Block]	2018 2019 2020 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Net unrealized losses (gains) on investment securities Net gains on sales and redemptions of Available-for-sale (1) ¥ (287,279 ) ¥ (29,182 ) ¥ (108,193 ) Investment securities gains Impairment losses on investment securities 6,759 596 1,590 Investment securities gains Other 262 (367 ) (499 ) (280,258 ) (28,953 ) (107,102 ) Total before tax 84,328 9,100 32,007 Income tax expense ¥ (195,930 ) ¥ (19,853 ) ¥ (75,095 ) Net of tax Net debt valuation adjustments ¥ 417 ¥ 1,016 ¥ 315 Equity in earnings of equity 417 1,016 315 Total before tax (128 ) (311 ) (96 ) Income tax expense ¥ 289 ¥ 705 ¥ 219 Net of tax Net unrealized losses (gains) on derivatives qualifying for cash flow hedges Interest rate contracts ¥ (7,782 ) ¥ 3,739 ¥ 9,878 Interest income on Loans, Foreign exchange contracts — — 3,399 Interest expense on Long-term debt or Foreign exchange losses—net Other (234 ) (77 ) 2 (8,016 ) 3,662 13,279 Total before tax 2,850 (980 ) (3,452 ) Income tax expense ¥ (5,166 ) ¥ 2,682 ¥ 9,827 Net of tax Defined benefit plans Net actuarial loss (2) ¥ 17,280 ¥ 11,431 ¥ 15,488 Other non-interest Prior service cost (2) (6,959 ) (6,269 ) (5,718 ) Other non-interest Gain on settlements and curtailment, and other (2) (4,417 ) (6,330 ) (3,127 ) Other non-interest 5,904 (1,168 ) 6,643 Total before tax (2,237 ) 574 (1,741 ) Income tax expense ¥ 3,667 ¥ (594 ) ¥ 4,902 Net of tax 2018 2019 Details of Accumulated OCI components Amount reclassified out of Line items in the consolidated (in millions) Foreign currency translation adjustments ¥ (5,743 ) ¥ (9,004 ) ¥ (5,003 ) Other non-interest 4,249 2 2,765 Other non-interest (1,494 ) (9,002 ) (2,238 ) Total before tax 1,760 2,784 1,105 Income tax expense ¥ 266 ¥ (6,218 ) ¥ (1,133 ) Net of tax Total reclassifications for the period ¥ (283,447 ) ¥ (34,445 ) ¥ (89,103 ) Total before tax 86,573 11,167 27,823 Income tax expense ¥ (196,874 ) ¥ (23,278 ) ¥ (61,280 ) Net of tax Notes: (1) Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020 while included unrealized gains (losses) related to both debt and equity securities for the fiscal year ended March 31, 2018. (2) These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Regulatory Capital Requiremen_2

Regulatory Capital Requirements [Text Block] (Tables)	12 Months Ended
Regulatory Capital Requirements [Text Block] (Tables)	Mar. 31, 2020
Domestic, Japan [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Consolidated: At March 31, 2019: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,769,793 16.03 % ¥ 14,097,771 12.04 % BK 14,632,620 14.42 8,114,105 8.00 TB 2,213,195 24.40 725,540 8.00 Tier 1 capital (to risk-weighted assets): MUFG (1) 16,276,301 13.90 11,755,949 10.04 BK 12,639,454 12.46 6,085,579 6.00 TB 1,928,955 21.26 544,155 6.00 Common Equity Tier 1 capital (to risk-weighted assets): MUFG (1) 14,322,407 12.23 9,999,582 8.54 BK 10,990,820 10.83 4,564,184 4.50 TB 1,775,565 19.57 408,116 4.50 Leverage ratio (2) : MUFG 16,276,301 4.94 9,871,460 3.00 BK 12,639,454 4.63 8,189,494 3.00 TB 1,928,955 5.09 1,135,795 3.00 At March 31, 2020: Total capital (to risk-weighted assets): MUFG (1) ¥ 18,279,566 15.87 % ¥ 13,827,788 12.01 % BK 14,285,601 14.43 7,917,895 8.00 TB 1,889,973 25.46 593,652 8.00 Tier 1 capital (to risk-weighted assets): MUFG (1) 15,623,321 13.56 11,525,076 10.01 BK 12,170,005 12.29 5,938,421 6.00 TB 1,625,712 21.90 445,239 6.00 Common Equity Tier 1 capital (to risk-weighted assets): MUFG (1) 13,708,333 11.90 9,798,042 8.51 BK 10,597,133 10.70 4,453,816 4.50 TB 1,444,348 19.46 333,929 4.50 Leverage ratio (2) : MUFG 15,623,321 4.42 10,593,527 3.00 BK 12,170,005 4.21 8,656,169 3.00 TB 1,625,712 4.51 1,079,863 3.00 Actual For capital Amount Ratio Amount Ratio (in millions, except percentages) Stand-alone: At March 31, 2019: Total capital (to risk-weighted assets): BK ¥ 13,560,583 15.58 % ¥ 6,959,207 8.00 % TB 2,195,098 24.25 723,953 8.00 Tier 1 capital (to risk-weighted assets): BK 11,773,839 13.53 5,219,405 6.00 TB 1,911,237 21.12 542,965 6.00 Common Equity Tier 1 capital (to risk-weighted assets): BK 10,172,206 11.69 3,914,554 4.50 TB 1,758,237 19.42 407,224 4.50 Leverage ratio (2) : BK 11,773,839 4.84 7,284,812 3.00 TB 1,911,237 5.55 1,031,484 3.00 At March 31, 2020: Total capital (to risk-weighted assets): BK ¥ 12,092,262 14.76 % ¥ 6,550,969 8.00 % TB 2,131,514 25.42 670,714 8.00 Tier 1 capital (to risk-weighted assets): BK 10,254,608 12.52 4,913,227 6.00 TB 1,867,723 22.27 503,035 6.00 Common Equity Tier 1 capital (to risk-weighted assets): BK 8,738,975 10.67 3,684,920 4.50 TB 1,686,723 20.11 377,276 4.50 Leverage ratio (2) : BK 10,254,608 4.02 7,644,928 3.00 TB 1,867,723 5.87 953,353 3.00 Notes: (1) Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and G-SIB G-SIB % as of March 31, 2019 and 2020, and the countercyclical buffer of 0.04% and % as of March 31, 2019 and 2020, respectively. (2) Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA.
Foreign, United States of America [Member] \| BK (US) [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual Minimum capital (1) Ratios OCC Amount Ratio Amount Ratio Amount Ratio (in millions, except percentages) BK(US): At December 31, 2018: Total capital (to risk-weighted assets) $ 13,905 15.09 % $ 9,102 9.875 % $ 9,217 10.00 % Tier 1 capital (to risk-weighted assets) 13,316 14.45 7,258 7.875 7,374 8.00 Tier 1 capital (to quarterly average assets) (2) 13,316 10.61 5,018 4.000 6,273 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 13,316 14.45 5,876 6.375 5,991 6.50 At December 31, 2019: Total capital (to risk-weighted assets) $ 14,746 15.11 % $ 10,244 10.500 % $ 9,756 10.00 % Tier 1 capital (to risk-weighted assets) 14,115 14.47 8,293 8.500 7,805 8.00 Tier 1 capital (to quarterly average assets) (2) 14,115 10.65 5,304 4.000 6,629 5.00 Common Equity Tier 1 capital (to risk-weighted assets) 14,115 14.47 6,829 7.000 6,342 6.50 Notes: (1) Beginning January 1, 2018 and 2019, the minimum capital requirement includes a capital conservation buffer of 1.875% and 2.5%, respectively. (2) Excludes certain deductions.
Foreign, United States of America [Member] \| MUAH [Member]
Risk-adjusted Capital Amounts and Ratios [Table Text Block]	Actual Minimum capital (1) Amount Ratio Amount Ratio (in millions, except percentages) MUAH: At December 31, 2018: Total capital (to risk-weighted assets) $ 14,904 14.60 % $ 10,081 9.875 % Tier 1 capital (to risk-weighted assets) 14,256 13.96 8,039 7.875 Tier 1 capital (to quarterly average assets) (2) 14,256 8.77 6,502 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 14,256 13.96 6,508 6.375 At December 31, 2019: Total capital (to risk-weighted assets) $ 15,769 14.73 % $ 11,237 10.500 % Tier 1 capital (to risk-weighted assets) 15,086 14.10 9,097 8.500 Tier 1 capital (to quarterly average assets) (2) 15,086 8.88 6,792 4.000 Common Equity Tier 1 capital (to risk-weighted assets) 15,086 14.10 7,492 7.000 Notes: (1) The minimum capital requirement includes a capital conservation buffer of 1.875% at December 31, 2018 and 2.5% at December 31, 2019. (2) Excludes certain deductions.

Earnings Per Common Share App_2

Earnings Per Common Share Applicable to Common Shareholders of MUFG [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Reconciliations of Net Income (Loss) and Weighted Average Number of Common Shares Outstanding Used for Computation of Basic EPS to Adjusted Amounts for Computation of Diluted EPS [Table Text Block]	2018 2019 (in millions) Income (Numerator): Net income attributable to Mitsubishi UFJ Financial Group ¥ 1,228,160 ¥ 718,645 ¥ 305,955 Effect of dilutive instruments: Stock acquisition rights and restricted stock units—Morgan Stanley (3,826 ) (3,745 ) (2,861 ) Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions ¥ 1,224,334 ¥ 714,900 ¥ 303,094 2018 2019 2020 (thousands of shares) Shares (Denominator): Weighted average common shares outstanding 13,291,842 13,058,698 12,912,790 Effect of dilutive instruments: Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan (1) 1,650 484 166 Weighted average common shares for diluted computation 13,293,492 13,059,182 12,912,956 2018 2019 2020 (in yen) Earnings per common share applicable to common shareholders of Mitsubishi UFJ Financial Group: Basic earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group ¥ 92.40 ¥ 55.03 ¥ 23.69 Diluted earnings per common share: Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group (1) ¥ 92.10 ¥ 54.74 ¥ 23.47 Note: (1) For the fiscal years ended March 31, 2019 and 2020, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrume_2

Derivative Financial Instruments [Text Block] (Tables)	12 Months Ended
Derivative Financial Instruments [Text Block] (Tables)	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Derivative Contracts [Table Text Block]	Notional amounts (1) 2019 2020 (in trillions) Interest rate contracts ¥ 1,409.6 ¥ 1,553.5 Foreign exchange contracts 230.5 230.2 Equity contracts 6.4 8.1 Commodity contracts 0.2 0.1 Credit derivatives 7.2 8.7 Other 3.0 3.1 Total ¥ 1,656.9 ¥ 1,803.7 Note: (1) Includes both written and purchased positions.
Fair Value Information on Derivative Instruments Recorded on Consolidated Balance Sheet [Table Text Block]	Fair value of derivative instruments 2019 (1)(5) 2020 (1)(5) Not designated (2) Designated (3) Total (4) Not designated (2) Designated (3) Total (4) (in billions) Derivative assets: Interest rate contracts ¥ 10,108 ¥ 1 ¥ 10,109 ¥ 10,847 ¥ — ¥ 10,847 Foreign exchange contracts 2,795 — 2,795 3,734 — 3,734 Equity contracts 188 — 188 236 — 236 Commodity contracts 27 — 27 26 — 26 Credit derivatives 84 — 84 114 — 114 Other 2 — 2 1 — 1 Total derivative assets ¥ 13,204 ¥ 1 ¥ 13,205 ¥ 14,958 ¥ — ¥ 14,958 Derivative liabilities: Interest rate contracts ¥ 9,896 ¥ — ¥ 9,896 ¥ 10,205 ¥ — ¥ 10,205 Foreign exchange contracts 2,671 — 2,671 3,604 4 3,608 Equity contracts 183 — 183 277 — 277 Commodity contracts 27 — 27 26 — 26 Credit derivatives 69 — 69 95 — 95 Other (6) (136 ) — (136 ) (177 ) — (177 ) Total derivative liabilities ¥ 12,710 ¥ — ¥ 12,710 ¥ 14,030 ¥ 4 ¥ 14,034 Notes: (1) The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts. (2) The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6). (3) The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets. (4) This table does not include contracts with embedded derivatives for which the fair value option has been elected. (5) For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31. (6) Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt.
Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments) [Table Text Block]	Trading and risk management derivatives gains and losses 2018 2019 2020 Foreign Trading Total Foreign Trading Total Foreign Trading Total (in billions) Interest rate contracts ¥ — ¥ 51 ¥ 51 ¥ — ¥ 6 ¥ 6 ¥ — ¥ (173 ) ¥ (173 ) Foreign exchange contracts (163 ) — (163 ) (347 ) — (347 ) (429 ) — (429 ) Equity — (260 ) (260 ) — 80 80 — 30 30 Commodity contracts — 6 6 — — — — — — Credit derivatives — (2 ) (2 ) — (40 ) (40 ) — 15 15 Other 3 (22 ) (19 ) (7 ) (70 ) (77 ) (5 ) (31 ) (36 ) Total ¥ (160 ) ¥ (227 ) ¥ (387 ) ¥ (354 ) ¥ (24 ) ¥ (378 ) ¥ (434 ) ¥ (159 ) ¥ (593 )
Protection Sold Through Credit Derivatives [Table Text Block]	Protection sold Maximum potential/Notional amount Fair value At March 31, 2019: 1 year 1-5 Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 378,527 ¥ 1,603,962 ¥ 145,689 ¥ 2,128,178 ¥ (30,303 ) Non-investment 112,901 238,330 5,672 356,903 (127 ) Not rated — 5,097 — 5,097 (47 ) Total 491,428 1,847,389 151,361 2,490,178 (30,477 ) Index and basket credit default swaps held by BK: Investment grade (2) — 120,854 — 120,854 (82 ) Non-investment — 101,001 — 101,001 (2,010 ) Total — 221,855 — 221,855 (2,092 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 13,000 194,618 8,000 215,618 (3,853 ) Non-investment — — — — — Not rated 8,863 206,832 3,444 219,139 (3,043 ) Total 21,863 401,450 11,444 434,757 (6,896 ) Total index and basket credit default swaps sold 21,863 623,305 11,444 656,612 (8,988 ) Total credit default swaps sold 513,291 2,470,694 162,805 3,146,790 (39,465 ) Other credit derivatives sold (3) Investment grade 77,693 — — 77,693 (620 ) Total credit derivatives ¥ 590,984 ¥ 2,470,694 ¥ 162,805 ¥ 3,224,483 ¥ (40,085 ) Protection sold Maximum potential/Notional amount Fair value At March 31, 2020: 1 year 1-5 Over Total (Asset)/ (1) (in millions) Single name credit default swaps: Investment grade (2) ¥ 303,870 ¥ 2,125,006 ¥ 494,040 ¥ 2,922,916 ¥ (63,855 ) Non-investment 93,671 279,892 49,681 423,244 3,358 Not rated 2,453 6,826 — 9,279 (18 ) Total 399,994 2,411,724 543,721 3,355,439 (60,515 ) Index and basket credit default swaps held by BK: Investment grade (2) — 28,296 — 28,296 (3 ) Non-investment — 99,035 — 99,035 (1,195 ) Total — 127,331 — 127,331 (1,198 ) Index and basket credit default swaps held by SCHD: Investment grade (2) 20,000 182,306 14,950 217,256 (1,820 ) Non- investme nt grade — 7,595 — 7,595 (165 ) Not rated 28,296 190,398 5,316 224,010 (5,205 ) Total 48,296 380,299 20,266 448,861 (7,190 ) Total index and basket credit default swaps sold 48,296 507,630 20,266 576,192 (8,388 ) Total credit default swaps sold 448,290 2,919,354 563,987 3,931,631 (68,903 ) Other credit derivatives sold Investment grade — — — — — Total credit derivatives ¥ 448,290 ¥ 2,919,354 ¥ 563,987 ¥ 3,931,631 ¥ (68,903 ) Notes: (1) Fair value amounts are shown on a gross basis prior to cash collateral or counte r (2) The MUFG Group considers ratings of Baa3/BBB- (3) Other credit derivatives primarily consist of total return swaps.

Obligations under Guarantees _2

Obligations under Guarantees and Other Off-balance Sheet Instruments [Text Block] (Tables)	12 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Contractual or Notional Amounts of Guarantees with Amount by Expiration Period [Table Text Block]	Maximum Amount by expiration period At March 31, 2019: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 2,792 ¥ 838 ¥ 271 Performance guarantees 3,256 2,332 784 140 Derivative instruments (1) 58,025 29,734 20,921 7,370 Liabilities of trust accounts 11,520 5,884 420 5,216 Other 53 12 13 28 Total ¥ 76,755 ¥ 40,754 ¥ 22,976 ¥ 13,025 Maximum Amount by expiration period At March 31, 2020: 1 year 1-5 Over (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,109 ¥ 763 ¥ 226 Performance guarantees 3,058 2,160 738 160 Derivative instruments (1) 58,836 36,021 14,543 8,272 Liabilities of trust accounts 13,142 6,752 451 5,939 Other 88 8 73 7 Total ¥ 79,222 ¥ 48,050 ¥ 16,568 ¥ 14,604 Note: (1) Credit derivatives sold by the MUFG Group are excluded from this presentation.
Maximum Potential Amount of Future Payments Classified Based upon Internal Credit Ratings [Table Text Block]	Amount by borrower grade At March 31, 2019: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 3,901 ¥ 3,779 ¥ 98 ¥ 21 ¥ 3 Performance guarantees 3,256 3,070 79 78 29 Total ¥ 7,157 ¥ 6,849 ¥ 177 ¥ 99 ¥ 32 Amount by borrower grade At March 31, 2020: Maximum Normal Close (1) Likely to (2) Not (in billions) Standby letters of credit and financial guarantees ¥ 4,098 ¥ 3,984 ¥ 93 ¥ 17 ¥ 4 Performance guarantees 3,058 2,904 96 36 22 Total ¥ 7,156 ¥ 6,888 ¥ 189 ¥ 53 ¥ 26 Notes: (1) Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons. (2) Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment,
Contractual Amounts with Regard to Other Off-balance Sheet Instruments [Table Text Block]	2019 2020 (in billions) Commitments to extend credit ¥ 77,273 ¥ 76,398 Commercial letters of credit 1,057 757 Commitments to make investments 240 247 Other 5 5

Variable Interest Entities _T_2

Variable Interest Entities [Text Block] (Tables)	12 Months Ended
Variable Interest Entities [Text Block] (Tables)	Mar. 31, 2020
Consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Consolidated VIEs Consolidated assets At March 31, 2019: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,698,146 ¥ 92,310 ¥ 26,101 ¥ 3,005 ¥ 1,424,444 ¥ 5,124,462 ¥ 27,824 Investment funds 680,922 — 14,113 477,239 18,118 — 171,452 Special purpose entities created for structured financing 203,458 — 2,214 — — 127,243 74,001 Repackaged instruments 279,327 506 — 53,346 137,509 86,753 1,213 Securitization of the MUFG Group’s assets 10,208,496 — — — — 10,183,624 24,872 Trust arrangements 7,888,210 — 8,953 202 311,412 7,565,862 1,781 Other 34,303 362 1,635 — 42 9,699 22,565 Total consolidated assets before elimination 25,992,862 93,178 53,016 533,792 1,891,525 23,097,643 323,708 The amounts eliminated in consolidation (7,772,776 ) (93,171 ) (29,361 ) (5,102 ) (63,331 ) (7,552,315 ) (29,496 ) Total consolidated assets ¥ 18,220,086 ¥ 7 ¥ 23,655 ¥ 528,690 ¥ 1,828,194 ¥ 15,545,328 ¥ 294,212 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,691,362 ¥ — ¥ 4,678,588 ¥ 1,552,572 ¥ 460,202 Investment funds 6,852 — — 5,158 1,694 Special purpose entities created for structured financing 114,469 — 609 111,523 2,337 Repackaged instruments 277,179 — 48,014 174,215 54,950 Securitization of the MUFG Group’s assets 10,167,632 — — 10,162,231 5,401 Trust arrangements 7,881,332 7,616,575 — — 264,757 Other 32,584 — 8,611 1,474 22,499 Total consolidated liabilities before elimination 25,171,410 7,616,575 4,735,822 12,007,173 811,840 The amounts eliminated in consolidation (14,676,389 ) (50,396 ) (2,996,041 ) (11,517,019 ) (112,933 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,922,307 ) (7,566,179 ) (1,719,246 ) (121 ) (636,761 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 572,714 ¥ — ¥ 20,535 ¥ 490,033 ¥ 62,146 Consolidated VIEs Consolidated assets At March 31, 2020: Total Cash and Interest-earning Trading Investment Loans All other (in millions) Asset-backed conduits ¥ 6,263,082 ¥ 102,781 ¥ 31,625 ¥ 12,989 ¥ 1,195,283 ¥ 4,913,939 ¥ 6,465 Investment funds 493,757 — 16,482 314,074 34,121 — 129,080 Special purpose entities created for structured financing 204,047 — 2,658 — — 119,348 82,041 Repackaged instruments 249,529 1,330 — 42,052 118,776 86,859 512 Securitization of the MUFG Group’s assets 10,956,261 — — — — 10,933,580 22,681 Trust arrangements 7,527,539 — 654 336,546 745,846 6,441,864 2,629 Other 31,295 350 2,055 — — 6,885 22,005 Total consolidated assets before elimination 25,725,510 104,461 53,474 705,661 2,094,026 22,502,475 265,413 The amounts eliminated in consolidation (6,877,849 ) (103,615 ) (23,427 ) (10,592 ) (289,567 ) (6,429,880 ) (20,768 ) Total consolidated assets ¥ 18,847,661 ¥ 846 ¥ 30,047 ¥ 695,069 ¥ 1,804,459 ¥ 16,072,595 ¥ 244,645 Consolidated liabilities Total Deposits Other short-term Long-term All other (in millions) Asset-backed conduits ¥ 6,253,318 ¥ — ¥ 4,327,685 ¥ 1,478,921 ¥ 446,712 Investment funds 15,817 — — 5,546 10,271 Special purpose entities created for structured financing 114,357 — — 112,474 1,883 Repackaged instruments 251,056 — 65,965 163,833 21,258 Securitization of the MUFG Group’s assets 10,924,830 — 16,008 10,077,839 830,983 Trust arrangements 7,522,190 6,743,261 — — 778,929 Other 27,302 — 5,989 1,321 19,992 Total consolidated liabilities before elimination 25,108,870 6,743,261 4,415,647 11,839,934 2,110,028 The amounts eliminated in consolidation (15,045,398 ) (703 ) (2,526,893 ) (11,374,581 ) (1,143,221 ) The amount of liabilities with recourse to the general credit of the MUFG Group (9,465,320 ) (6,742,558 ) (1,857,923 ) (1 ) (864,838 ) Liabilities of consolidated VIEs for which creditors or beneficial interest holders do not have recourse to the general credit of the MUFG Group ¥ 598,152 ¥ — ¥ 30,831 ¥ 465,352 ¥ 101,969
Non-consolidated VIEs [Member]
Assets and Liabilities of Variable Interest Entities [Table Text Block]	Non-consolidated On-balance On-balance At March 31, 2019: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 29,621,609 ¥ 6,221,274 ¥ 4,982,357 ¥ 659 ¥ 1,704,553 ¥ 3,277,145 ¥ — ¥ — ¥ — Investment funds 67,750,419 1,952,676 1,753,823 187,166 1,253,705 304,310 8,642 206 206 Special purpose entities created for structured financing 42,676,571 3,972,450 3,015,593 252,597 48,895 2,709,008 5,093 9,827 9,827 Repackaged instruments 12,885,367 3,477,545 3,383,161 690,305 2,169,798 478,252 44,806 6,087 6,087 Other 60,074,743 3,482,153 2,454,807 123,595 65,451 2,145,665 120,096 57,567 57,567 Total ¥ 213,008,709 ¥ 19,106,098 ¥ 15,589,741 ¥ 1,254,322 ¥ 5,242,402 ¥ 8,914,380 ¥ 178,637 ¥ 73,687 ¥ 73,687 Non-consolidated On-balance On-balance At March 31, 2020: Total assets Maximum Total Trading Investment Loans All Total All other (in millions) Asset-backed conduits ¥ 27,700,099 ¥ 5,836,895 ¥ 4,797,551 ¥ 190 ¥ 1,737,979 ¥ 3,059,382 ¥ — ¥ — ¥ — Investment funds 55,644,434 1,918,403 1,712,037 437,858 525,022 724,253 24,904 356,679 356,679 Special purpose entities created for structured financing 37,026,192 3,601,834 2,764,156 392,588 35,774 2,317,128 18,666 6,058 6,058 Repackaged instruments 8,215,327 3,030,263 2,931,617 394,478 2,123,058 361,184 52,897 — — Other 54,962,702 2,940,349 2,314,142 191,646 — 1,995,985 126,511 41,693 41,693 Total ¥ 183,548,754 ¥ 17,327,744 ¥ 14,519,503 ¥ 1,416,760 ¥ 4,421,833 ¥ 8,457,932 ¥ 222,978 ¥ 404,430 ¥ 404,430

Fees and Commissions Income __2

Fees and Commissions Income [Text Block] (Tables)	12 Months Ended
Fees and Commissions Income [Text Block] (Tables)	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Details of Fees and Commissions Income [Table Text Block]	2018 2019 2020 (in millions) Fees and commissions on deposits ¥ 53,483 ¥ 52,624 ¥ 53,684 Fees and commissions on remittances and transfers 169,300 168,756 169,407 Fees and commissions on foreign trading business 78,239 73,176 66,025 Fees and commissions on credit card business 212,515 225,877 238,112 Fees and commissions on security-related services 258,728 233,448 221,494 Fees and commissions on administration and management services for investment funds 159,481 147,597 184,559 Trust fees 112,399 115,002 119,919 Guarantee fees (1) 44,160 44,962 46,322 Insurance commissions 49,223 46,918 44,415 Fees and commissions on real estate business 40,573 45,160 49,764 Other fees and commissions (2) 284,691 285,058 308,351 Total ¥ 1,462,792 ¥ 1,438,578 ¥ 1,502,052 Notes: (1) Guarantee fees are not within the scope of the guidance on revenue from contracts with customers. (2) Other fees and commissions include non-refundable

Trading Account Profits and L_2

Trading Account Profits and Losses [Text Block] (Tables)	12 Months Ended
Trading Account Profits and Losses [Text Block] (Tables)	Mar. 31, 2020
Text Block [Abstract]
Net Trading Gains (Losses) [Table Text Block]	2018 2019 (in millions) Interest rate and other derivative contracts ¥ (226,788 ) ¥ (24,031 ) ¥ (159,045 ) Trading account securities, excluding derivatives 153,674 192,931 924,418 Trading account profits (losses)—net (73,114 ) 168,900 765,373 Foreign exchange derivative contracts (1) (159,986 ) (354,401 ) (434,052 ) Net trading gains ( ) ¥ (233,100 ) ¥ (185,501 ) ¥ 331,321 Note: (1) Losses on foreign exchange derivative contracts are included in Foreign exchange losses—net in the accompanying consolidated statements of income. Foreign exchange losses—net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange gains

Business Segments _Text Block_

Business Segments [Text Block] (Tables)	12 Months Ended
Business Segments [Text Block] (Tables)	Mar. 31, 2020
Segment Reporting [Abstract]
Financial Information by Business Segment [Table Text Block]	Customer Business Global Other Total Retail & Japanese Global Global Asset Total (in billions) Fiscal year ended March 31, 2018: Net revenue: ¥ 1,582.5 ¥ 523.2 ¥ 364.3 ¥ 652.8 ¥ 190.4 ¥ 3,313.2 ¥ 574.5 ¥ 30.4 ¥ 3,918.1 BK and TB (1) 781.6 433.0 236.9 (3.3 ) 83.8 1,532.0 369.3 128.6 2,029.9 Net interest income 463.4 148.9 92.1 (3.3 ) — 701.1 235.1 183.5 1,119.7 Net fees 246.4 225.1 146.8 — 83.8 702.1 (12.0 ) (22.9 ) 667.2 Other 71.8 59.0 (2.0 ) — — 128.8 146.2 (32.0 ) 243.0 Other than BK and TB 800.9 90.2 127.4 656.1 106.6 1,781.2 205.2 (98.2 ) 1,888.2 Operating expenses 1,226.3 314.8 226.7 468.8 119.4 2,356.0 228.7 132.8 2,717.5 Operating profit (loss) ¥ 356.2 ¥ 208.4 ¥ 137.6 ¥ 184.0 ¥ 71.0 ¥ 957.2 ¥ 345.8 ¥ (102.4 ) ¥ 1,200.6 Fiscal year ended March 31, 2019: Net revenue: ¥ 1,522.0 ¥ 545.2 ¥ 383.8 ¥ 690.5 ¥ 203.0 ¥ 3,344.5 ¥ 479.8 ¥ (11.9 ) ¥ 3,812.4 BK and TB (1) 737.1 415.0 254.0 (1.3 ) 93.2 1,498.0 303.9 59.1 1,861.0 Net interest income 457.2 150.2 110.9 (1.3 ) — 717.0 227.8 200.4 1,145.2 Net fees 243.8 210.3 142.4 — 93.2 689.7 (13.9 ) (54.9 ) 620.9 Other 36.1 54.5 0.7 — — 91.3 90.0 (86.4 ) 94.9 Other than BK and TB 784.9 130.2 129.8 691.8 109.8 1,846.5 175.9 (71.0 ) 1,951.4 Operating expenses 1,221.3 309.3 241.5 483.5 124.6 2,380.2 223.5 136.4 2,740.1 Operating profit (loss) ¥ 300.7 ¥ 235.9 ¥ 142.3 ¥ 207.0 ¥ 78.4 ¥ 964.3 ¥ 256.3 ¥ (148.3 ) ¥ 1,072.3 Fiscal year ended March 31, 2020: Net revenue: ¥ 1,501.6 ¥ 551.1 ¥ 376.8 ¥ 804.6 ¥ 243.0 ¥ 3,477.1 ¥ 575.2 ¥ 15.7 ¥ 4,068.0 BK and TB (1) 721.1 420.7 270.5 0.1 94.6 1,507.0 358.4 12.7 1,878.1 Net interest income 439.0 164.2 115.2 0.9 2.5 721.8 123.1 85.4 930.3 Net fees 248.0 205.0 137.6 — 92.2 682.8 (12.6 ) (64.8 ) 605.4 Other 34.1 51.5 17.7 (0.8 ) (0.1 ) 102.4 247.9 (7.9 ) 342.4 Other than BK and TB 780.5 130.4 106.3 804.5 148.4 1,970.1 216.8 3.0 2,189.9 Operating expenses 1,203.0 315.8 247.8 571.8 171.7 2,510.1 232.2 150.7 2,893.0 Operating profit (loss) ¥ 298.6 ¥ 235.3 ¥ 129.0 ¥ 232.8 ¥ 71.3 ¥ 967.0 ¥ 343.0 ¥ (135.0 ) ¥ 1,175.0 Note: (1) “BK and TB” is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis.
Reconciliation of Operating Profit (Loss) from Segments to Consolidated Statements of Income [Table Text Block]	2018 2019 2020 (in billions) Operating profit: ¥ 1,201 ¥ 1,072 ¥ 1,175 Reversal of (provision for) credit losses 241 (34 ) (322 ) Trading account profits (losses)—net (287 ) 182 920 Equity investment securities gains (losses)—net 215 (305 ) (618 ) Debt investment securities gains (losses)—net 71 (3 ) (403 ) Foreign exchange gains (losses)—net 7 47 (145 ) Equity in earnings of equity method investees—net 228 210 283 Impairment of goodwill — — (384 ) Impairment of intangible assets (22 ) (118 ) (4 ) Reversal of (provision for) off-balance 96 (38 ) 62 Other—net (88 ) (142 ) (131 ) Income before income tax expense ¥ 1,662 ¥ 871 ¥ 433

Foreign Activities _Text Bloc_2

Foreign Activities [Text Block] (Tables)	12 Months Ended
Foreign Activities [Text Block] (Tables)	Mar. 31, 2020
Text Block [Abstract]
Estimated Financial Information by Geographic Areas [Table Text Block]	Domestic Foreign Total Japan United Europe Asia/Oceania Other (1) (in millions) Fiscal year ended March 31, 2018: Total revenue (2) ¥ 2,127,278 ¥ 1,337,529 ¥ 506,211 ¥ 779,983 ¥ 443,106 ¥ 5,194,107 Total expense (3) 1,687,344 843,885 173,665 651,125 176,269 3,532,288 Income before income tax expense 439,934 493,644 332,546 128,858 266,837 1,661,819 Net income attributable to Mitsubishi UFJ Financial Group 140,091 447,887 322,581 92,016 225,585 1,228,160 Total assets at end of fiscal year 196,121,542 44,831,664 22,342,574 27,163,121 10,111,411 300,570,312 Fiscal year ended March 31, 2019: Total revenue (2) ¥ 1,886,469 ¥ 1,637,569 ¥ 222,267 ¥ 1,157,946 ¥ 504,372 ¥ 5,408,623 Total expense (3) 2,204,147 1,012,978 173,934 892,729 253,993 4,537,781 Income (loss) before income tax expense (benefit) (317,678 ) 624,591 48,333 265,217 250,379 870,842 Net income (loss) attributable to Mitsubishi UFJ Financial Group (345,148 ) 573,698 50,877 214,582 224,636 718,645 Total assets at end of fiscal year 194,070,495 49,987,389 21,535,278 27,992,986 11,642,751 305,228,899 Fiscal year ended March 31, 2020: Total revenue (2) ¥ 1,596,794 ¥ 2,223,984 ¥ 89,412 ¥ 1,326,426 ¥ 566,222 ¥ 5,802,838 Total expense (3) 2,565,895 1,051,164 218,623 1,174,200 359,736 5,369,618 Income (loss) before income tax expense (benefit) (969,101 ) 1,172,820 (129,211 ) 152,226 206,486 433,220 Net income (loss) attributable to Mitsubishi UFJ Financial Group (1,001,477 ) 1,113,913 (140,372 ) 142,568 191,323 305,955 Total assets at end of fiscal year 207,532,337 60,587,867 19,099,410 30,845,864 13,687,805 331,753,283 Notes: (1) Other areas primarily include Canada, Latin America, the Caribbean and the Middle East. (2) Total revenue is comprised of Interest income and Non-interest (3) Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest
Analysis of Certain Asset and Liability Accounts Related to Foreign Activities [Table Text Block]	2019 2020 (in millions) Cash and due from banks ¥ 828,839 ¥ 971,870 Interest-earning deposits in other banks 8,453,191 12,662,558 Total ¥ 9,282,030 ¥ 13,634,428 Trading account assets ¥ 26,991,984 ¥ 31,374,451 Investment securities ¥ 8,779,340 ¥ 9,040,512 Loans—net of unearned income, unamortized premiums and deferred loan fees ¥ 51,678,674 ¥ 53,079,542 Deposits ¥ 49,044,234 ¥ 49,291,478 Funds borrowed: Call money, funds purchased ¥ 67,246 ¥ 276,040 Payables under repurchase agreements 9,459,547 13,476,026 Payables under securities lending transactions 47,886 176,998 Other short-term borrowings 5,107,832 4,733,138 Long-term debt 2,697,463 2,733,242 Total ¥ 17,379,974 ¥ 21,395,444 Trading account liabilities ¥ 3,897,844 ¥ 6,575,570

Fair Value _Text Block_ (Tables

Fair Value [Text Block] (Tables)	12 Months Ended
Fair Value [Text Block] (Tables)	Mar. 31, 2020
Assets and Liabilities Measured at Fair Value by Level on Recurring Basis [Table Text Block]	At March 31, 2019 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 12,821,328 ¥ 13,725,079 ¥ 785,326 ¥ 27,331,733 Debt securities Japanese national government and Japanese government agency bonds 2,117,841 512,134 — 2,629,975 Japanese prefectural and municipal bonds — 117,799 — 117,799 Foreign government and official institution bonds 9,264,028 454,365 792 9,719,185 Corporate bonds — 3,203,585 31,384 3,234,969 Residential mortgage-backed securities — 7,038,353 35,181 7,073,534 Asset-backed securities — 253,274 627,678 880,952 Other debt securities — 747 35,148 35,895 Commercial paper — 1,473,693 — 1,473,693 Equity securities (2) 1,439,459 671,129 55,143 2,165,731 Trading derivative assets 63,582 13,047,590 93,313 13,204,485 Interest rate contracts 23,430 10,067,719 17,307 10,108,456 Foreign exchange contracts 1,115 2,771,115 22,861 2,795,091 Equity contracts 39,037 139,666 9,000 187,703 Commodity contracts — 3,727 25,684 29,411 Credit derivatives — 65,363 18,461 83,824 Investment securities: Available-for-sale 22,550,086 10,684,983 283,434 33,518,503 Japanese national government and Japanese government agency bonds 20,635,872 3,441,824 — 24,077,696 Japanese prefectural and municipal bonds — 2,226,566 — 2,226,566 Foreign government and official institution bonds 1,914,214 707,959 19,246 2,641,419 Corporate bonds — 1,126,535 4,196 1,130,731 Residential mortgage-backed securities — 1,615,336 15 1,615,351 Commercial mortgage-backed securities — 128,917 2,038 130,955 Asset-backed securities — 1,371,467 131,455 1,502,922 Other debt securities — 66,379 126,484 192,863 Equity securities 5,982,629 375,914 27,820 6,386,363 Marketable equity securities 5,982,629 375,914 — 6,358,543 Nonmarketable equity securities (3) — — 27,820 27,820 Other (4) 807,193 42,184 32,378 881,755 Total ¥ 42,224,818 ¥ 37,875,750 ¥ 1,222,271 ¥ 81,322,839 At March 31, 2019 Level 1 Level 2 Level 3 Fair Value ( in millions Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 157,114 ¥ 5,796 ¥ — ¥ 162,910 Trading derivative liabilities 88,329 12,701,110 57,143 12,846,582 Interest rate contracts 35,179 9,839,618 21,496 9,896,293 Foreign exchange contracts 2,633 2,663,347 4,670 2,670,650 Equity contracts 50,517 126,737 6,138 183,392 Commodity contracts — 2,916 24,735 27,651 Credit derivatives — 68,492 104 68,596 Obligation to return securities received as collateral (5) 2,912,355 174,671 — 3,087,026 Other (6) — 426,368 65,648 492,016 Total ¥ 3,157,798 ¥ 13,307,945 ¥ 122,791 ¥ 16,588,534 At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions) Assets Trading account assets: Trading securities (1) ¥ 14,891,635 ¥ 17,061,985 ¥ 525,946 ¥ 32,479,566 Debt securities Japanese national government and Japanese government agency bonds 3,805,039 350,128 — 4,155,167 Japanese prefectural and municipal bonds — 93,479 — 93,479 Foreign government and official institution bonds 9,356,427 417,766 1,052 9,775,245 Corporate bonds 11 2,537,559 144 2,537,714 Residential mortgage-backed securities — 9,037,539 — 9,037,539 Asset-backed securities — 590,556 416,259 1,006,815 Other debt securities — 7,787 6,651 14,438 Commercial paper — 2,959,580 — 2,959,580 Equity securities (2) 1,730,158 1,067,591 101,840 2,899,589 Trading derivative assets 216,834 14,680,632 60,108 14,957,574 Interest rate contracts 74,488 10,758,790 13,329 10,846,607 Foreign exchange contracts 1,550 3,723,087 9,046 3,733,683 Equity contracts 140,796 87,285 7,491 235,572 Commodity contracts — 10 27,492 27,502 Credit derivatives — 111,460 2,750 114,210 Investment securities: Available-for-sale 22,126,881 11,798,392 274,930 34,200,203 Japanese national government and Japanese government agency bonds 19,897,187 3,565,692 — 23,462,879 Japanese prefectural and municipal bonds — 2,952,820 — 2,952,820 Foreign government and official institution bonds 2,229,694 792,027 15,767 3,037,488 Corporate bonds — 1,262,718 10,108 1,272,826 Residential mortgage-backed securities — 1,459,378 15 1,459,393 Commercial mortgage-backed securities — 380,278 1,977 382,255 Asset-backed securities — 1,328,601 140,875 1,469,476 Other debt securities — 56,878 106,188 163,066 Equity securities 4,471,499 296,819 39,963 4,808,281 Marketable equity securities 4,471,499 296,819 — 4,768,318 Nonmarketable equity securities (3) — — 39,963 39,963 Other (4) 1,054,186 45,913 36,701 1,136,800 Total ¥ 42,761,035 ¥ 43,883,741 ¥ 937,648 ¥ 87,582,424 At March 31, 2020 Level 1 Level 2 Level 3 Fair Value (in millions Liabilities Trading account liabilities: Trading securities sold, not yet purchased ¥ 555,664 ¥ 3,718 ¥ — ¥ 559,382 Trading derivative liabilities 300,215 13,851,205 56,631 14,208,051 Interest rate contracts 153,098 10,038,198 14,079 10,205,375 Foreign exchange contracts 3,360 3,596,589 4,041 3,603,990 Equity contracts 143,757 121,229 11,713 276,699 Commodity contracts — 14 26,775 26,789 Credit derivatives — 95,175 23 95,198 Obligation to return securities received as collateral (5) 4,663,068 143,103 — 4,806,171 Other (6) — 514,003 6,606 520,609 Total ¥ 5,518,947 ¥ 14,512,029 ¥ ¥ 20,094,213 Notes: (1) Includes securities measured under the fair value option. (2) Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥40,400 million and ¥66,918 million at March 31, 2019 and 2020, respectively. The amounts of unfunded commitments related to these private equity funds were ¥94,483 million and ¥102,743 million at March 31, 2019 and 2020, respectively. (3) Excludes certain investments valued at net asset value of real estate funds and private equity and other , respectively, and those at March 31, 2020 were ¥23,233 million and ¥18,862 million, respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2019 were ¥2,054 million and nil, respectively, and those at March 31, 2020 were ¥1,494 million and nil, respectively. (4) Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments. (5) Included in Other liabilities. (6) Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments.
Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs [Table Text Block]	March 31, Total gains (losses) Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 827,493 ¥ 23,848 (2) ¥ (1,341 ) ¥ 454,048 ¥ — ¥ (316,384 ) ¥ (213,944 ) ¥ 29,445 ¥ (17,839 ) ¥ 785,326 ¥ 18,299 (2) Debt securities Foreign government and official institution bonds 1,047 863 — 117,619 — (118,377 ) (317 ) — (43 ) 792 5 Corporate bonds 23,092 611 — 2,040 — (1,798 ) (4,188 ) 29,423 (5) (17,796 ) (5) 31,384 286 Residential mortgage-backed securities 41,141 (282 ) — — — — (5,678 ) — — 35,181 (289 ) Asset-backed securities 684,637 18,692 (1,341 ) 315,865 — (195,851 ) (194,324 ) — — 627,678 15,528 Other debt securities 33,450 1,698 — — — — — — — 35,148 1,698 Equity securities 44,126 2,266 — 18,524 — (358 ) (9,437 ) 22 — 55,143 1,071 Trading derivatives—net 12,119 (5,871 ) (2) (744 ) 787 (682 ) — 37 20,192 10,332 36,170 (25,241 ) (2) Interest rate contracts—net 14,596 12,397 57 — (119 ) — (25,601 ) (7,013 ) 1,494 (4,189 ) 11,507 Foreign exchange contracts—net 6,736 (10,997 ) (419 ) 210 — — (322 ) 27,230 (5) (4,247 ) 18,191 (10,451 ) Equity contracts—net (10,685 ) 18,756 (374 ) 13 (228 ) — (17,680 ) (25 ) 13,085 2,862 (752 ) Commodity contracts—net 683 32 6 564 (335 ) — (1 ) — — 949 795 Credit derivatives—net 789 (26,059 ) (14 ) — — — 43,641 — — 18,357 (26,340 ) Investment securities: Available-for-sale 350,660 6,415 (3) (9,791 ) 273,201 — — (338,180 ) 1,456 (327 ) 283,434 (498 ) (3) Foreign government and official institution bonds 20,192 — (876 ) 645 — — (715 ) — — 19,246 — Corporate bonds 6,037 (345 ) 3 3,450 — — (6,078 ) 1,456 (5) (327 ) (5) 4,196 (498 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed 2,430 — (135 ) — — — (257 ) — — 2,038 — Asset-backed securities 161,172 6,760 (5,016 ) 263,587 — — (295,048 ) — — 131,455 — Other debt securities 160,814 — (3,767 ) 5,519 — — (36,082 ) — — 126,484 — Equity securities 28,359 (2,298 ) (3) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) (3) Nonmarketable equity securities 28,359 (2,298 ) — 3,795 — (1,418 ) — — (618 ) 27,820 (3,060 ) Other 8,660 (1,022 ) (7) (20 ) 24,961 — (206 ) — 5 — 32,378 (1,191 ) (7) Total ¥ 1,227,291 ¥ 21,072 ¥ (11,896 ) ¥ 756,792 ¥ (682 ) ¥ (318,008 ) ¥ (552,087 ) ¥ 51,098 ¥ (8,452 ) ¥ 1,165,128 ¥ (11,691 ) Liabilities Other ¥ (25,528 ) ¥ (19,629 ) (4) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 (6) ¥ 35,230 (6) ¥ 65,648 ¥ (10,778 ) (4) Total ¥ (25,528 ) ¥ (19,629 ) ¥ 6,670 ¥ — ¥ 16,759 ¥ — ¥ (18,499 ) ¥ 44,727 ¥ 35,230 ¥ 65,648 ¥ (10,778 ) March 31, Total gains (losses) for the period Purchases Issues Sales Settlements Transfers Transfers March 31, Change in Included Included (in millions) Assets Trading account assets: Trading securities (1) ¥ 785,326 ¥ (22,419 ) (2) ¥ — ¥ 227,656 ¥ — ¥ (214,183 ) ¥ (225,980 ) ¥ 52,140 ¥ (76,594 ) ¥ 525,946 ¥ (18,915 ) (2) Debt securities Foreign government and official institution bonds 792 589 — 93,957 — (92,748 ) (18 ) — (1,520 ) 1,052 (12 ) Corporate bonds 31,384 (279 ) — 631 — (3,937 ) (4,721 ) 24,882 (5) (47,816 ) (5) 144 (13 ) Residential mortgage-backed securities 35,181 (695 ) — — — (23,837 ) (10,649 ) — — — — Asset-backed securities 627,678 (23,494 ) — 113,239 — (93,655 ) (207,509 ) — — 416,259 (18,815 ) Other debt securities 35,148 (1,239 ) — — — — — — (27,258 ) ( 8 ) 6,651 (387 ) Equity securities 55,143 2,699 — 19,829 — (6 ) (3,083 ) 27,258 (8) — 101,840 312 Trading derivatives—net 36,170 4,503 (2) 178 714 (1,449 ) — (33,463 ) 40,857 (44,033 ) 3,477 (16,742 ) (2) Interest rate contracts—net (4,189 ) 21,290 (24 ) — — — (12,025 ) 2,254 (8,056 ) (750 ) 8,046 Foreign exchange contracts—net 18,191 (21,429 ) 89 3 — — 4,858 35,444 (5) (32,151 ) (5) 5,005 (21,483 ) Equity contracts—net 2,862 5,188 110 96 (777 ) — (11,305 ) (41 ) (355 ) (4,222 ) (2,846 ) Commodity contracts—net 949 (174 ) (1 ) 615 (672 ) — — — — 717 (167 ) Credit derivatives—net 18,357 (372 ) 4 — — — (14,991 ) 3,200 (3,471 ) 2,727 (292 ) Investment securities: Available-for-sale 283,434 (2,402 ) (3) 804 281,041 — (24 ) (300,023 ) 15,201 (3,101 ) 274,930 (934 ) (3) Foreign government and official institution bonds 19,246 — 1,625 828 — — (5,932 ) — — 15,767 — Corporate bonds 4,196 (458 ) 342 663 — (1 ) (6,734 ) 15,201 (5) (3,101 ) (5) 10,108 (934 ) Residential mortgage-backed securities 15 — — — — — — — — 15 — Commercial mortgage-backed securities 2,038 — 125 — — (23 ) (163 ) — — 1,977 — Asset-backed securities 131,455 (1,944 ) (1,085 ) 274,110 — — (261,661 ) — — 140,875 — Other debt securities 126,484 — (203 ) 5,440 — — (25,533 ) — — 106,188 — Equity securities 27,820 2,585 (3) — 12,718 — (2,527 ) (35 ) — (598 ) 39,963 863 (3) Nonmarketable equity securities 27,820 2,585 — 12,718 — (2,527 ) (35 ) — (598 ) 39,963 863 Other 32,378 (10,105 ) (7) (375 ) 44,324 — (29,334 ) (187 ) — — 36,701 (10,136 ) (7) Total ¥ 1,165,128 ¥ (27,838 ) ¥ 607 ¥ 566,453 ¥ (1,449 ) ¥ (246,068 ) ¥ (559,688 ) ¥ 108,198 ¥ (124,326 ) ¥ 881,017 ¥ (45,864 ) Liabilities Other ¥ 65,648 ¥ (5,388 ) (4) ¥ (414 ) ¥ — ¥ 2,258 ¥ — ¥ (21,133 ) ¥ 333 (6) ¥ (46,302 ) (6) ¥ 6,606 ¥ 9,648 (4) Total ¥ 65,648 ¥ (5,388 ) ¥ (414 ) ¥ — ¥ 2,258 ¥ — ¥ (21,133 ) ¥ 333 ¥ (46,302 ) ¥ 6,606 ¥ 9,648 Notes: (1) Includes Trading securities measured under the fair value option. (2) Included in Trading account profits (losses)—net and in Foreign exchange losses—net. (3) Included in Investment securities gains (losses)—net. (4) Included in Trading account profits (losses)—net. (5) Transfers into (out of) Level 3 for Corporate bonds were caused (6) Transfers into (out of) Level 3 for bifurcated embedded derivatives in Other were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs. (7) Included in Fees and commissions income and Other non-interest (8) Transfers relate to the reclassification of certain securities.
Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level [Table Text Block]	2019 2020 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total (in millions) Assets Investment securities (1)(2) ¥ — ¥ 80,779 ¥ 4,208 ¥ 84,987 ¥ — ¥ 15,473 ¥ 2,703 ¥ 18,176 Loans 2,656 9,104 250,678 262,438 2,548 9,199 260,282 272,029 Loans held for sale — — 77,506 77,506 — — 73,573 73,573 Collateral dependent loans 2,656 9,104 173,172 184,932 2,548 9,199 186,709 198,456 Premises and equipment — — 35,352 35,352 — — 37,109 37,109 Intangible assets — — 19,635 19,635 — — 453 453 Goodwill — — — — — — 283,032 283,032 Other assets 136,528 49,756 9,774 196,058 73,015 — 18,609 91,624 Investments (1) 136,528 49,756 — 186,284 73,015 — 5,911 78,926 Other — — 9,774 9,774 — — 12,698 12,698 Total ¥ 139,184 ¥ 139,639 ¥ 319,647 ¥ 598,470 ¥ 75,563 ¥ 24,672 ¥ 602,188 ¥ 702,423 Notes: (1) Excludes certain investments valued at net asset value of ¥8,866 million and ¥12,935 million at March 31, 2019 and 2020, respectively. The unfunded commitments related to these investments are ¥12,242 million and ¥17,216 million at March 31, 2019 and 2020, respectively. These investments are in private equity funds. (2) Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative.
Losses (Gains) Recorded as a Result of Changes in Fair Value Measured on a Nonrecurring Basis [Table Text Block]	2019 2020 (in millions) Investment securities ¥ (50,785 ) ¥ (2,171 ) Loans 30,153 47,359 Loans held for sale 4,762 4,688 Collateral dependent loans 25,391 42,671 Premises and equipment 31,345 16,517 Intangible assets 118,108 3,732 Goodwill — 383,810 Other assets 59,557 46,237 Investments in equity method investees 51,645 21,672 Other 7,912 24,565 Total ¥ 188,378 ¥ 495,484
Gains (Losses) Related to Instruments for which Fair Value Option was Elected [Table Text Block]	2018 2019 2020 Trading Foreign Total Trading Foreign Total Trading Foreign Total (in millions) Financial assets: Trading account securities (1) ¥ (148,242 ) ¥ (267,507 ) ¥ (415,749 ) ¥ 208,952 ¥ 186,578 ¥ 395,530 ¥ 837,832 ¥ (596,017 ) ¥ 241,815 Total ¥ (148,242 ) ¥ (267,507 ) ¥ (415,749 ) ¥ 208,952 ¥ 186,578 ¥ 395,530 ¥ 837,832 ¥ (596,017 ) ¥ 241,815 Financial liabilities: Other short-term borrowings (2) ¥ 5,902 ¥ — ¥ 5,902 ¥ (5,559 ) ¥ — ¥ (5,559 ) ¥ 5,194 ¥ — ¥ 5,194 Long-term debt (2) 7,554 — 7,554 (8,322 ) — (8,322 ) (8,087 ) — (8,087 ) Total ¥ 13,456 ¥ — ¥ 13,456 ¥ (13,881 ) ¥ — ¥ (13,881 ) ¥ (2,893 ) ¥ — ¥ (2,893 ) Notes: (1) Excludes Danamon’s equity securities. See Note 2 for reference. (2) Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.
Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding [Table Text Block]	2019 2020 Remaining Fair value Fair value Remaining Fair value Fair value (in millions) Financial liabilities: Long-term debt ¥ 358,730 ¥ 325,808 ¥ (32,922 ) ¥ 319,149 ¥ 304,067 ¥ (15,082 ) Total ¥ 358,730 ¥ 325,808 ¥ (32,922 ) ¥ 319,149 ¥ 304,067 ¥ (15,082 )
Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on a Recurring Basis on Consolidated Balance Sheets by Level [Table Text Block]	Carrying Estimated fair value At March 31, 2019 Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 33,924 ¥ 33,924 ¥ 33,924 ¥ — ¥ — Interest-earning deposits in other banks 40,647 40,647 — 40,647 — Call loans and funds sold 1,110 1,110 — 1,110 — Receivables under resale agreements 10,975 10,975 — 10,975 — Receivables under securities borrowing transactions 2,759 2,759 — 2,759 — Investment securities 4,442 4,453 1,197 1,135 2,121 Loans, net of allowance for credit losses (1) 116,213 117,064 3 247 116,814 Other financial assets (2) 7,455 7,455 — 7,455 — Financial liabilities: Deposits Non-interest-bearing ¥ 30,443 ¥ 30,443 ¥ — ¥ 30,443 ¥ — Interest-bearing 168,846 168,899 — 168,899 — Total deposits 199,289 199,342 — 199,342 — Call money and funds purchased 2,450 2,450 — 2,450 — Payables under repurchase agreements 25,225 25,225 — 25,225 — Payables under securities lending transactions 913 913 — 913 — Due to trust account and other short-term borrowings 9,177 9,177 — 9,177 — Long-term debt 27,790 27,968 — 27,968 — Other financial liabilities 6,781 6,781 — 6,781 — Carrying Estimated fair value At March 31, 2020 Total Level 1 Level 2 Level 3 (in billions) Financial assets: Cash and due from banks ¥ 33,283 ¥ 33,283 ¥ 33,283 ¥ — ¥ — Interest-earning deposits in other banks 45,267 45,267 — 45,267 — Call loans and funds sold 1,169 1,169 — 1,169 — Receivables under resale agreements 23,996 23,996 — 23,996 — Receivables under securities borrowing transactions 3,444 3,444 — 3,444 — Investment securities 4,166 4,178 1,134 1,042 2,002 Loans, net of allowance for credit losses (1) 117,373 118,497 3 259 118,235 Other financial assets (2) 8,494 8,494 — 8,494 — Financial liabilities: Deposits Non-interest-bearing ¥ 33,382 ¥ 33,382 ¥ — ¥ 33,382 ¥ — Interest-bearing 170,574 170,631 — 170,631 — Total deposits 203,956 204,013 — 204,013 — Call money and funds purchased 3,669 3,669 — 3,669 — Payables under repurchase agreements 31,850 31,850 — 31,850 — Payables under securities lending transactions 1,017 1,017 — 1,017 — Due to trust account and other short-term borrowings 19,057 19,057 — 19,057 — Long-term debt 27,772 27,941 — 27,941 — Other financial liabilities 7,139 7,139 — 7,139 — Notes: (1) Includes loans held for sale and collateral dependent loans measured at fair value on a nonrecurring basis. Refer to “Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis” for the details of the level classification. (2) Excludes investments in equity method investees of ¥2,487 billion and ¥2,421 billion at March 31, 2019 and 2020, respectively.
Fair Value, Measurements, Recurring [Member]
Quantitative Information about Level 3 Fair Value Measurements [Table Text Block]	At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 19,246 Return on equity method Probability of default 0.0%~0.4% 0.3 % Recovery rate 60.0%~70.0% 66.7 % Market-required return on capital 10.0% 10.0 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 109,213 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 67.2 % Loan price 90.5%~100.3% 95.4 % 587,577 Internal model (4) Asset correlations 10.0% 10.0 % Discount factor 1.0%~1.2% 1.2 % Prepayment rate 22.7% 22.7 % Probability of default 0.0%~90.1% — (3) Recovery rate 64.3% 64.3 % Other debt securities 35,148 Discounted cash flow Liquidity premium 1.0%~2.4% 1.3 % 112,822 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 40.0%~90.0% 78.0 % Market-required return on capital 8.0%~10.0% 9.5 % At March 31, 2019 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (4,189 ) Option model Probability of default 0.0%~12.0% Correlation between interest rates 29.2%~51.3% Correlation between interest rate and foreign exchange rate 22.8%~60.0% Recovery rate 41.0%~48.0% Volatility 11.0%~71.3% Foreign exchange 18,198 Option model Probability of default 0.0%~12.0% Correlation between interest rates 35.0%~70.0% Correlation between interest rate and foreign exchange rate 14.8%~60.0% Recovery rate 41.0%~48.0% Correlation between underlying assets 65.0% Volatility 9.7%~18.2% Equity contracts—net (2,727 ) Option model Correlation between foreign exchange rate and equity 7.0%~64.1% Correlation between equities 21.6%~80.3% Correlation between underlying assets 51.7%~82.0% Volatility 21.0%~30.0% 5,878 Discounted cash flow Term of litigation 1.0 year At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range Weighted (2) (in millions) Assets Trading securities and Investment securities: Foreign government and official institution bonds ¥ 15,767 Return on equity method Probability of default 0.2%~1.3% 0.4 % Recovery rate 55.0%~90.0% 69.9 % Market-required return on capital 8.0 %~10.0% 9.9 % Residential mortgage-backed securities, Commercial mortgage-backed securities and Asset-backed securities 92,025 Discounted cash flow Probability of default 1.2%~5.3% 5.0 % Recovery rate 60.0%~76.0% 68.2 % 389,170 Internal model (4) Asset correlations 1.0% 1.0 % Discount factor 1.1%~1.4% 1.4 % Prepayment rate 21.0% 21.0 % Probability of default 0.0%~99.0% — (3) Recovery rate 57.8% 57.8 % Other debt securities 6,651 Discounted cash flow Liquidity premium 2.4% 2.4 % 86,734 Return on equity method Probability of default 0.0%~25.0% 0.3 % Recovery rate 60.0%~90.0% 79.8 % Market-required return on capital 8.0%~10.0% 9.4 % Equity securities 27,144 Discounted cash flow Liquidity premium 1.0% 1.0 % At March 31, 2020 Fair value (1) Valuation technique Significant unobservable inputs Range (in millions) Trading derivatives—net: Interest rate contracts—net (728 ) Option model Correlation between interest rates 32.9 Correlation 16.7%~60.0% Volatility 0.0%~100.0% Foreign exchange 5,005 Option model Correlation between interest rates 30.0%~70.0% Correlation between interest rate and foreign exchange rate 15.8%~60.0% Correlation between underlying assets 60.0% Volatility 7.5%~17.0% Equity contracts—net (10,038 ) Option model Correlation between foreign exchange rate and equity (58.4 ) Correlation between equities 19.5%~81.0% Volatility 24.2%~32.0% 6,166 Discounted cash flow Term of litigation 0.1 year~1.1 years Notes: (1) The fair value as of March 31, 2019 and 2020 excludes the fair value of investments valued using vendor prices. (2) Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments. (3) See “Probability of default” in “Sensitivity to and range of unobservable inputs.” (4) For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities.”

Parent Company Only Financial_2

Parent Company Only Financial Information [Text Block] (Tables) - MUFG [Member]	12 Months Ended
	Mar. 31, 2020
Condensed Balance Sheets [Table Text Block]	Condensed Balance Sheets As of March 31, 2019 (in millions) Assets: Cash and interest-earning deposits with banking subsidiaries ¥ 203,713 ¥ 185,668 Investments in subsidiaries and affiliated companies 16,668,232 16,116,568 Banking subsidiaries 12,754,653 12,361,190 Non-banking 3,913,579 3,755,378 Loans to subsidiaries 7,199,052 8,746,231 Banking subsidiaries 6,864,309 8,222,278 Non-banking 334,743 523,953 Other assets 223,725 241,441 Total assets ¥ 24,294,722 ¥ 25,289,908 Liabilities and Shareholders’ equity: Short-term borrowings from banking subsidiaries ¥ 1,425,682 ¥ 1,255,991 Long-term debt from non-banking 277,138 30,686 Long-term debt 7,187,469 8,758,646 Other liabilities 204,885 228,098 Total liabilities 9,095,174 10,273,421 Total shareholders’ equity 15,199,548 15,016,487 Total liabilities and shareholders’ equity ¥ 24,294,722 ¥ 25,289,908
Condensed Statements of Income [Table Text Block]	Condensed Statements of Income Fiscal years ended March 31, 2018 2019 (in millions) Income: Dividends from subsidiaries and affiliated companies ¥ 576,332 ¥ 306,879 ¥ 376,376 Banking subsidiaries 487,491 207,161 277,472 Non-banking 88,841 99,718 98,904 Management fees from subsidiaries 26,073 28,305 33,543 Interest income from subsidiaries 80,670 127,117 174,500 Foreign exchange gains (losses)—net 24,726 (20,598 ) 4,834 Trading account losses—net (26,749 ) (8,078 ) (37,272 ) Gains on sales of investment in subsidiaries and affiliated companies — 252,253 67,406 Other income 1,508 3,199 14,968 Total income 682,560 689,077 634,355 Expense: Operating expenses 26,016 28,168 30,431 Interest expense to subsidiaries and affiliated companies 31,426 34,594 26,244 Interest expense 65,068 108,756 155,774 Other expense 1,791 1,657 15,024 Total expense 124,301 173,175 227,473 Equity in undistributed net income (loss) of subsidiaries and affiliated companies—net 672,421 194,390 (108,069 ) Income before income tax expense (benefit) 1,230,680 710,292 298,813 Income tax expense (benefit) 2,520 (8,353 ) (7,142 ) Net income ¥ 1,228,160 ¥ 718,645 ¥ 305,955
Condensed Statements of Cash Flows [Table Text Block]	Condensed Statements of Cash Flows Fiscal years ended March 31, 2018 2019 2020 (in millions) Operating activities: Net income ¥ 1,228,160 ¥ 718,645 ¥ 305,955 Adjustments and other (799,571 ) (351,775 ) (1,704 ) Net cash provided by operatin g 428,589 366,870 304,251 Investing activities: — — 240,000 Proceeds from sales of investment in subsidiaries and affiliated companies — 455,605 135,581 Purchase of equity investment in subsidiaries and an affiliated company (53,000 ) (18,346 ) — Net increase in loans to subsidiaries (1,682,576 ) (2,112,711 ) (1,547,178 ) Other—net (4,361 ) (9,009 ) (12,572 ) Net cash used in investing activities (1,739,937 ) (1,684,461 ) (1,184,169 ) Financing activities: Net decrease in short-term borrowings from subsidiaries (41,402 ) (194,300 ) (164,272 ) Proceeds from issuance of long-term debt 1,872,986 2,043,677 1,844,488 Repayment of long-term debt (112,184 ) (314 ) (214,994 ) Repayment of long-term debt to affiliated companies (1,090 ) (500 ) (241,000 ) Proceeds from sales of treasury stock 1 3 2 Payments for acquisition of treasury stock (200,038 ) (150,277 ) (50,022 ) Dividends paid (241,067 ) (276,279 ) (304,538 ) Other—net (9,677 ) (15,490 ) (7,791 ) Net cash provided by financing activities 1,267,529 1,406,520 861,873 Net increase (decrease) in cash and cash equivalents (43,819 ) 88,929 (18,045 ) Cash and cash equivalents at beginning of fiscal year 158,603 114,784 203,713 Cash and cash equivalents at end of fiscal year ¥ 114,784 ¥ 203,713 ¥ 185,668

Basis of Financial Statements_4

Basis of Financial Statements and Summary of Significant Accounting Policies (Narrative) (Detail) - JPY (¥) ¥ in Millions	Apr. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2020	Mar. 31, 2021	Apr. 01, 2018
Basis of financial statements:
Increase (decrease) to net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year			¥ 19,970	¥ (10,760)
Summary of significant accounting policies:
Floor percentage of the corridor defined for the amortization of net actuarial gains and losses					10.00%
Accounting changes:
Right-of-Use Assets		¥ 393,435			¥ 393,435
Lease liabilities		482,813			482,813
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Accounting changes:
Amount of pension benefits and SIP investments impacted due to amendment		414,604	251,936		¥ 414,604
Minimum [Member]
Basis of financial statements:
Increase (decrease) to net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year		(142,000)
Summary of significant accounting policies:
Threshold of "more likely than not" recognition for a tax position					50.00%
Maximum [Member]
Basis of financial statements:
Increase (decrease) to net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year		(164,000)
Leases [Member]
Accounting changes:
Right-of-Use Assets	¥ 428,000
Lease liabilities	502,000
Decrease to retained earnings	(15,000)
Targeted Improvements to Accounting for Hedging Activities [Member]
Accounting changes:
Carrying amount of Held-to-maturity debt securities transferred to Available-for-sale debt securities	¥ 18,606
Codification Improvements [Member] \| Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Accounting changes:
Amount of pension benefits and SIP investments impacted due to amendment		¥ 136,316	¥ 112,000		¥ 136,316
Retained Earnings Appropriated for Legal Reserve [Member] \| Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accounting changes:
Cumulative effect of change on Equity							¥ 2,702,000
Accumulated Other Comprehensive Income (Loss), Net of Taxes [Member] \| Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accounting changes:
Cumulative effect of change on Equity							¥ (2,702,000)
Commercial [Member] \| Minimum [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month					1 month
Card [Member] \| Minimum [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month					3 months
MUAH [Member] \| Minimum [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month					3 months
Krungsri [Member] \| Minimum [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month					3 months
Residential [Member] \| Minimum [Member]
Summary of significant accounting policies:
Loans contractually past due before being placed on nonaccrual status, in month					6 months
Forecast [Member] \| Measurement of Credit Losses on Financial Instruments [Member] \| Minimum [Member]
Recently Issued Accounting Pronouncements:
Increase in allowance for credit losses						¥ 380,000
Decrease to retained earnings approximately						(270,000)
Forecast [Member] \| Measurement of Credit Losses on Financial Instruments [Member] \| Maximum [Member]
Recently Issued Accounting Pronouncements:
Increase in allowance for credit losses						450,000
Decrease to retained earnings approximately						¥ (330,000)

Basis of Financial Statements_5

Basis of Financial Statements and Summary of Significant Accounting Policies (Estimated Useful Lives of Premises and Equipment) (Detail)	12 Months Ended
	Mar. 31, 2020
Buildings [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	15 years
Buildings [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	50 years
Equipment and Furniture [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	2 years
Equipment and Furniture [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	20 years
Leasehold Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	3 years
Leasehold Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, Useful life, years	39 years

Basis of Financial Statements_6

Basis of Financial Statements and Summary of Significant Accounting Policies (Useful Lives of Intangible Assets and Amortization Method by Major Class) (Detail)	12 Months Ended
	Mar. 31, 2020
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Software [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	2 years
Software [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	10 years
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Core Deposit Intangibles [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	9 years
Core Deposit Intangibles [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	16 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line, Declining-balance
Customer Relationships [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	3 years
Customer Relationships [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	27 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortization method	Straight-line
Trade Names [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	4 years
Trade Names [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Useful life, years	40 years

Business Developments (Narrativ

Business Developments (Narrative) (Detail) ¥ / shares in Units, Rp / shares in Units, ¥ in Millions, Rp in Billions		Aug. 02, 2019JPY (¥)Subsidiaries	May 01, 2019	Apr. 29, 2019JPY (¥)¥ / shares		Apr. 29, 2019IDR (Rp)	Aug. 03, 2018JPY (¥)		Aug. 03, 2018IDR (Rp)sharesRp / shares	Dec. 29, 2017JPY (¥)		Dec. 29, 2017IDR (Rp)sharesRp / shares	Oct. 02, 2017JPY (¥)	Feb. 18, 2020JPY (¥)	Mar. 31, 2020JPY (¥)Offices	Mar. 31, 2020JPY (¥)Offices	Mar. 31, 2019JPY (¥)	Mar. 31, 2018JPY (¥)	Apr. 29, 2019Rp / shares	Aug. 03, 2018shares¥ / shares		Dec. 29, 2017shares¥ / shares		Dec. 26, 2017	May 15, 2017JPY (¥)
Business Developments [Line Items]
Liability recognized in Other liabilities															¥ 13,223,846	¥ 13,223,846	¥ 10,660,267
Reduction in Noncontrolling interests															(728,029)	(728,029)	(785,200)
Reduction in Capital surplus															(5,533,520)	(5,533,520)	(5,577,186)
Increase in Accumulated other comprehensive income, net of taxes															(420,417)	(420,417)	(284,269)	¥ 2,477,315
Goodwill, recorded on acquisition															¥ 517,626	517,626	433,891	441,334
Remeasurement profits																41,218
Revenue																1,921,086	2,261,068	2,471,108
Net income (loss)																¥ 305,955	718,645	¥ 1,228,160
Customer Relationships [Member]
Business Developments [Line Items]
Weighted average amortization period, in years																17 years
Mitsubishi UFJ NICOS becomes a Wholly-Owned Subsidiary of MUFG [Member]
Business Developments [Line Items]
Ownership acquired, in percentage													15.02%
Payment in cash													¥ 50,000
Liability recognized in Other liabilities																									¥ 50,000
Reduction in Noncontrolling interests																									15,390
Reduction in Capital surplus																									34,751
Increase in Accumulated other comprehensive income, net of taxes																									¥ 141
Settlement of Other Liabilities													¥ 50,000
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]
Business Developments [Line Items]
Final equity interest expected upon the completion of proposed transactions																								73.80%
Number of offices in Indonesia \| Offices															900	900
Description of strategic investment																was executed through three steps (the “Proposed Transaction”), and the completion of the Proposed Transaction resulted in MUFG Bank becoming the largest shareholder in Danamon and Danamon becoming a consolidated subsidiary of MUFG Bank.
Equity interest after acquisition, in aggregated percentage			94.10%	94.00%		94.00%	40.00%		40.00%	19.90%		19.90%
Additional equity interests acquired, in percentage				54.00%		54.00%	20.10%		20.10%
Price per share paid \| (per share)				¥ 77	[1]				Rp 8,921			Rp 8,323							Rp 9,590	¥ 69	[2]	¥ 70	[3]
Investment amount paid				¥ 397,000		Rp 50,000	¥ 132,300	[2]	Rp 17,187	¥ 133,000	[3]	Rp 15,875
Description of Calculation basis							a price book-value ratio of 2.0 calculated on the basis of Danamon’s net assets as of June 30, 2018 with certain adjustments applied.		a price book-value ratio of 2.0 calculated on the basis of Danamon’s net assets as of June 30, 2018 with certain adjustments applied.	a price book-value ratio of 2.0 calculated on the basis of Danamon’s net assets as of September 30, 2017 with certain adjustments applied.		a price book-value ratio of 2.0 calculated on the basis of Danamon’s net assets as of September 30, 2017 with certain adjustments applied.
Price book-value ratio \| shares									2			2								2		2
Goodwill, recorded on acquisition				254,271
Intangible assets, recorded on acquisition	[4]			¥ 146,899
Weighted average amortization period, in years				13 years 2 months 12 days		13 years 2 months 12 days
Noncontrolling interests, recorded on acquisition															¥ 51,314	¥ 51,314
Equity interest remeasured to fair value															271,830
Remeasurement profits															41,218
Acquisition-related costs																869
Total assets				¥ 1,728,480
Total liabilities				¥ 1,242,115
Exchange rate of IDR				0.0080					0.0077			0.0084								0.0077		0.0084
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Customer Relationships [Member]
Business Developments [Line Items]
Intangible assets, recorded on acquisition				¥ 79,552
Weighted average amortization period, in years				13 years 1 month 6 days		13 years 1 month 6 days
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Pro Forma [Member]
Business Developments [Line Items]
Net income (loss)																3,206	16,083
Impact of amortizing certain acquisition accounting adjustments																11,299	11,445
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Estimated Fair Value [Member]
Business Developments [Line Items]
Loans not subject to the guidance on loans and debt securities acquired with deteriorated credit quality															1,068,906	1,068,906
Gross contractual amounts receivable for loans															1,082,422	1,082,422
Gross contractual amounts receivable for loans not expected to be collected															34,363	34,363
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Danamon and Subsidiaries [Member]
Business Developments [Line Items]
Revenue															119,331
Net income (loss)															¥ (4,553)
MUFG Bank's Acquisition of Shares in Bank Nusantara Parahyangan in Indonesia [Member]
Business Developments [Line Items]
Equity interest after acquisition, in aggregated percentage				99.90%		99.90%
Additional equity interests acquired, in percentage				92.10%		92.10%
Price per share paid \| (per share)				¥ 33	[1]														Rp 4,088
Investment amount paid				¥ 24,100		Rp 3,000
Exchange rate of IDR				0.0080
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member]
Business Developments [Line Items]
Payment in cash		¥ 312,225
Equity interest after acquisition, in aggregated percentage		100.00%
Goodwill, recorded on acquisition		¥ 177,065
Intangible assets, recorded on acquisition		¥ 105,973
Weighted average amortization period, in years		18 years 8 months 12 days
Number of subsidiaries acquired \| Subsidiaries		9
Acquisition-related costs		¥ 3,775
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member] \| Customer Relationships [Member]
Business Developments [Line Items]
Intangible assets, recorded on acquisition		¥ 100,862
Weighted average amortization period, in years		18 years
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member] \| Pro Forma [Member]
Business Developments [Line Items]
Net income (loss)																6,047	16,051
Impact of amortizing certain acquisition accounting adjustments																5,979	6,622
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member] \| Estimated Fair Value [Member]
Business Developments [Line Items]
Intangible assets, recorded on acquisition		¥ 105,973
Total assets		197,867
Cash and bank deposits		42,019
Total liabilities		68,519
Accrued bonuses		¥ 18,769
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member] \| First Sentier Investors [Member]
Business Developments [Line Items]
Revenue																38,508
Net income (loss)																(734)
MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member]
Business Developments [Line Items]
Payment in cash														¥ 555,000
Goodwill, recorded on acquisition														32,591
Total assets														522,797
Total liabilities														¥ 138
MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member] \| Pro Forma [Member]
Business Developments [Line Items]
Net income (loss)																¥ 77	¥ 48

[1]	Calculated based on the exchange rate of IDR1 = ¥0.0080
[2]	Calculated based on the exchange rate of IDR1 = ¥0.0077
[3]	Calculated based on the exchange rate of IDR1 = ¥0.0084
[4]	Intangible assets with a weighted average amortization period of 13.2 years primarily include ¥79,552 million of relationships with agents with a weighted average amortization period of 13.1 years and ¥44,140 million of core deposit intangibles with a weighted average amortization period of 10.1 years.

Business Developments (Estimate

Business Developments (Estimated Fair Values of the Assets Acquired and Liabilities Assumed Related to Acquisition of Danamon) (Detail) - JPY (¥) ¥ in Millions		Apr. 29, 2019	Mar. 31, 2020
Customer Relationships [Member]
Business Developments [Line Items]
Weighted average amortization period, in years			17 years
Core Deposit Intangibles [Member]
Business Developments [Line Items]
Weighted average amortization period, in years			10 years
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member]
Business Developments [Line Items]
Loans		¥ 1,086,638
Intangible assets	[1]	146,899
Total assets		1,728,480
Deposits—Total deposits		915,075
Total liabilities		¥ 1,242,115
Weighted average amortization period, in years		13 years 2 months 12 days
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Customer Relationships [Member]
Business Developments [Line Items]
Intangible assets		¥ 79,552
Weighted average amortization period, in years		13 years 1 month 6 days
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Core Deposit Intangibles [Member]
Business Developments [Line Items]
Intangible assets		¥ 44,140
Weighted average amortization period, in years		10 years 1 month 6 days

[1]	Intangible assets with a weighted average amortization period of 13.2 years primarily include ¥79,552 million of relationships with agents with a weighted average amortization period of 13.1 years and ¥44,140 million of core deposit intangibles with a weighted average amortization period of 10.1 years.

Business Developments (Pro Form

Business Developments (Pro Forma Statements of Income Related to Acquisition of Danamon (Unaudited)) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of income data:
Net interest income	¥ 2,242,799	¥ 2,295,398	¥ 2,230,261
Non-interest income—Total	1,875,695	1,595,244	1,935,091
Net income attributable to Mitsubishi UFJ Financial Group	305,955	718,645	¥ 1,228,160
MUFG Bank's Acquisition of Shares in Bank Danamon in Indonesia [Member] \| Pro Forma [Member]
Statement of income data:
Net interest income	119,818	130,540
Non-interest income—Total	30,852	30,857
Net income attributable to Mitsubishi UFJ Financial Group	¥ 3,206	¥ 16,083

Business Developments (Pro Fo_2

Business Developments (Pro Forma Statements of Income Related to Acquisition of FSI (Unaudited)) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of income data:
Non-interest income—Total	¥ 1,875,695	¥ 1,595,244	¥ 1,935,091
Net income attributable to Mitsubishi UFJ Financial Group	305,955	718,645	¥ 1,228,160
Mitsubishi UFJ Trust and Banking's Acquisition of Colonial First State Global Asset Management [Member] \| Pro Forma [Member]
Statement of income data:
Non-interest income—Total	78,475	77,323
Net income attributable to Mitsubishi UFJ Financial Group	¥ 6,047	¥ 16,051

Business Developments (Estima_2

Business Developments (Estimated Fair Values of the Assets Acquired and Liabilities Assumed Related to Acquisition of DVB Bank SE's Aviation Finance Division) (Detail) - MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member] ¥ in Millions	Feb. 18, 2020JPY (¥)
Business Developments [Line Items]
Loans	¥ 515,933
Total assets	522,797
Total liabilities	¥ 138

Business Developments (Pro Fo_3

Business Developments (Pro Forma Statements of Income Related to Acquisition of DVB Bank SE's Aviation Finance Division (Unaudited)) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of income data:
Net interest income	¥ 2,242,799	¥ 2,295,398	¥ 2,230,261
Non-interest income—Total	1,875,695	1,595,244	1,935,091
Net income attributable to Mitsubishi UFJ Financial Group	305,955	718,645	¥ 1,228,160
MUFG Bank's Acquisition of DVB Bank SE's Aviation Finance Division [Member] \| Pro Forma [Member]
Statement of income data:
Net interest income	4,868	4,825
Non-interest income—Total	430	430
Net income attributable to Mitsubishi UFJ Financial Group	¥ 77	¥ 48

Investment Securities (Narrativ

Investment Securities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Investment Securities [Line Items]
Gross realized gains on sales of Available-for-sale debt securities and marketable equity securities			¥ 330,508
Gross realized losses on sales of Available-for-sale debt securities and marketable equity securities			49,290
Gross realized gains on sales of Available-for-sale debt securities	¥ 151,015	¥ 45,244
Gross realized losses on sales of Available-for-sale debt securities	44,662	16,541
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)—net			8,196
Other-than-temporary impairment ("OTTI") losses of investment securities	¥ 1,467	596	99
Marketable Equity Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)—net			6,660
Marketable Equity Securities [Member] \| Minimum [Member]
Investment Securities [Line Items]
Length of time with fair value of investment below cost	6 months
Percentage of fair value of investments below cost	20.00%
Corporate Bonds [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)—net			114
Other-than-temporary impairment ("OTTI") losses of debt securities included in Investment securities gains (losses)—net	¥ 1,590	606
Credit loss components of impairment losses recognized in earnings	1,535	¥ 1,761
Nonmarketable Equity Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities included in Investment securities gains (losses)—net			¥ 1,422
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities
Asset-backed Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities
Other Debt Securities [Member]
Investment Securities [Line Items]
Other-than-temporary impairment ("OTTI") losses of investment securities

Investment Securities (Amortize

Investment Securities (Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020		Mar. 31, 2019
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	¥ 33,907,767		¥ 33,174,487
Available-for-sale debt securities, Gross unrealized gains	343,331		400,534
Available-for-sale debt securities, Gross unrealized losses	50,895		56,518
Available-for-sale debt securities, Fair value	34,200,203		33,518,503
Held-to-maturity debt securities, Amortized cost	4,165,781		4,441,901
Held-to-maturity debt securities, Gross unrealized gains	43,847		46,339
Held-to-maturity debt securities, Gross unrealized losses	31,734		35,293
Held-to-maturity debt securities, Fair value	4,177,894		4,452,947
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	23,308,538		23,748,558
Available-for-sale debt securities, Gross unrealized gains	185,302		330,115
Available-for-sale debt securities, Gross unrealized losses	30,961		977
Available-for-sale debt securities, Fair value	23,462,879		24,077,696
Held-to-maturity debt securities, Amortized cost	1,100,574		1,100,701
Held-to-maturity debt securities, Gross unrealized gains	29,856		41,619
Held-to-maturity debt securities, Gross unrealized losses
Held-to-maturity debt securities, Fair value	1,130,430		1,142,320
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	2,938,743		2,203,978
Available-for-sale debt securities, Gross unrealized gains	16,279		22,593
Available-for-sale debt securities, Gross unrealized losses	2,202		5
Available-for-sale debt securities, Fair value	2,952,820		2,226,566
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	2,936,110		2,648,874
Available-for-sale debt securities, Gross unrealized gains	107,406		18,099
Available-for-sale debt securities, Gross unrealized losses	6,028		25,554
Available-for-sale debt securities, Fair value	3,037,488		2,641,419
Held-to-maturity debt securities, Amortized cost	151,555		138,731
Held-to-maturity debt securities, Gross unrealized gains	243		193
Held-to-maturity debt securities, Gross unrealized losses	689		212
Held-to-maturity debt securities, Fair value	151,109		138,712
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,261,586		1,117,302
Available-for-sale debt securities, Gross unrealized gains	12,445		14,251
Available-for-sale debt securities, Gross unrealized losses	1,205		822
Available-for-sale debt securities, Fair value	1,272,826		1,130,731
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,460,641		1,635,220
Available-for-sale debt securities, Gross unrealized gains	3,083		1,469
Available-for-sale debt securities, Gross unrealized losses	4,331		21,338
Available-for-sale debt securities, Fair value	1,459,393		1,615,351
Held-to-maturity debt securities, Amortized cost	737,242		910,990
Held-to-maturity debt securities, Gross unrealized gains	10,478		1,209
Held-to-maturity debt securities, Gross unrealized losses	3,012	[1]	21,202	[2]
Held-to-maturity debt securities, Fair value	744,708		890,997
Residential Mortgage-backed Securities [Member] \| MUAH [Member]
Investment Securities [Line Items]
Unrealized losses before taxes at the date of reclassification from Available-for-sale debt securities to Held-to-maturity debt securities remaining in Accumulated OCI	8,215		10,591
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	379,234		132,996
Available-for-sale debt securities, Gross unrealized gains	6,110		310
Available-for-sale debt securities, Gross unrealized losses	3,089		2,351
Available-for-sale debt securities, Fair value	382,255		130,955
Held-to-maturity debt securities, Amortized cost	146,039		160,267
Held-to-maturity debt securities, Gross unrealized gains	2,993		1,903
Held-to-maturity debt securities, Gross unrealized losses	317	[1]	2,032	[2]
Held-to-maturity debt securities, Fair value	148,715		160,138
Commercial Mortgage-backed Securities [Member] \| MUAH [Member]
Investment Securities [Line Items]
Unrealized losses before taxes at the date of reclassification from Available-for-sale debt securities to Held-to-maturity debt securities remaining in Accumulated OCI	3,178		4,667
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	1,461,083		1,494,629
Available-for-sale debt securities, Gross unrealized gains	9,516		10,846
Available-for-sale debt securities, Gross unrealized losses	1,123		2,553
Available-for-sale debt securities, Fair value	1,469,476		1,502,922
Held-to-maturity debt securities, Amortized cost	2,030,371		2,131,212
Held-to-maturity debt securities, Gross unrealized gains	277		1,415
Held-to-maturity debt securities, Gross unrealized losses	27,716		11,847
Held-to-maturity debt securities, Fair value	2,002,932		2,120,780
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Amortized cost	161,832	[3]	192,930	[4]
Available-for-sale debt securities, Gross unrealized gains	3,190	[3]	2,851	[4]
Available-for-sale debt securities, Gross unrealized losses	1,956	[3]	2,918	[4]
Available-for-sale debt securities, Fair value	163,066	[3]	192,863	[4]
Other Debt Securities [Member] \| Private Placement Debt Conduit Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value	¥ 86,734		¥ 112,822

[1]	MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale debt securities to Held-to-maturity debt securities. As a result of the reclassification of residential mortgage-backed securities and commercial mortgage-backed securities, the unrealized losses before taxes at the date of reclassification remaining in Accumulated OCI in the accompanying consolidated balance sheets were ¥8,215 million and ¥3,178 million, respectively, at March 31, 2020 and are not included in the table above.
[2]	MUFG Americas Holdings reclassified residential mortgage-backed securities and commercial mortgage-backed securities from Available-for-sale debt securities to Held-to-maturity debt securities. As a result of the reclassification of residential mortgage-backed securities and commercial mortgage-backed securities, the unrealized losses before taxes at the date of reclassification remaining in Accumulated OCI in the accompanying consolidated balance sheets were ¥10,591 million and ¥4,667 million, respectively, at March 31, 2019 and are not included in the table above.
[3]	Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds.
[4]	Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds.

Investment Securities (Amorti_2

Investment Securities (Amortized Cost and Fair Value by Contractual Maturity) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Held-to-maturity debt securities, Amortized cost:
Due in one year or less	¥ 24,013
Due from one year to five years	1,202,901
Due from five years to ten years	591,471
Due after ten years	2,347,396
Held-to-maturity debt securities, Amortized cost	4,165,781	¥ 4,441,901
Held-to-maturity debt securities, Fair value:
Due in one year or less	24,056
Due from one year to five years	1,235,096
Due from five years to ten years	587,205
Due after ten years	2,331,537
Held-to-maturity debt securities, Fair value	4,177,894	4,452,947
Available-for-sale debt securities, Fair value:
Due in one year or less	11,827,106
Due from one year to five years	10,833,597
Due from five years to ten years	5,794,878
Due after ten years	5,744,622
Available-for-sale debt securities, Fair value	¥ 34,200,203	¥ 33,518,503

Investment Securities (Investme

Investment Securities (Investments by Length and Category in Continuous Loss Position) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)Securities	Mar. 31, 2019JPY (¥)Securities
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 14,344,490	¥ 5,324,873
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	44,087	8,419
Available-for-sale debt securities, Fair value, 12 months or more	646,265	1,988,575
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	6,808	48,099
Available-for-sale debt securities, Fair value, Total	14,990,755	7,313,448
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 50,895	¥ 56,518
Available-for-sale debt securities, Number of securities \| Securities	1,408	1,079
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 811,706	¥ 1,500,382
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	10,290	11,432
Held-to-maturity debt securities, Fair value, 12 months or more	1,754,352	1,249,493
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	21,444	23,861
Held-to-maturity debt securities, Fair value, Total	2,566,058	2,749,875
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 31,734	¥ 35,293
Held-to-maturity debt securities, Number of securities \| Securities	398	601
Japanese National Government and Japanese Government Agency Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 11,781,600	¥ 4,149,302
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	30,961	976
Available-for-sale debt securities, Fair value, 12 months or more		5,599
Available-for-sale debt securities, Gross unrealized losses, 12 months or more		1
Available-for-sale debt securities, Fair value, Total	11,781,600	4,154,901
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 30,961	¥ 977
Available-for-sale debt securities, Number of securities \| Securities	202	39
Japanese Prefectural and Municipal Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 935,540	¥ 12,772
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	2,202	5
Available-for-sale debt securities, Fair value, 12 months or more
Available-for-sale debt securities, Gross unrealized losses, 12 months or more
Available-for-sale debt securities, Fair value, Total	935,540	12,772
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 2,202	¥ 5
Available-for-sale debt securities, Number of securities \| Securities	340	4
Foreign Government and Official Institution Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 564,620	¥ 397,718
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	5,481	1,125
Available-for-sale debt securities, Fair value, 12 months or more	114,407	1,160,671
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	547	24,429
Available-for-sale debt securities, Fair value, Total	679,027	1,558,389
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 6,028	¥ 25,554
Available-for-sale debt securities, Number of securities \| Securities	153	179
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 55,746
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	689
Held-to-maturity debt securities, Fair value, 12 months or more		55,084
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more		212
Held-to-maturity debt securities, Fair value, Total	55,746	55,084
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 689	¥ 212
Held-to-maturity debt securities, Number of securities \| Securities	9	10
Corporate Bonds [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 522,941	¥ 163,615
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	1,191	776
Available-for-sale debt securities, Fair value, 12 months or more	25,228	79,758
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	14	46
Available-for-sale debt securities, Fair value, Total	548,169	243,373
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,205	¥ 822
Available-for-sale debt securities, Number of securities \| Securities	154	92
Residential Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 114,057	¥ 316,942
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	530	1,757
Available-for-sale debt securities, Fair value, 12 months or more	388,064	648,353
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	3,801	19,581
Available-for-sale debt securities, Fair value, Total	502,121	965,295
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 4,331	¥ 21,338
Available-for-sale debt securities, Number of securities \| Securities	402	536
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 108,478	¥ 74,180
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	1,033	1,199
Held-to-maturity debt securities, Fair value, 12 months or more	360,841	798,165
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	1,979	20,003
Held-to-maturity debt securities, Fair value, Total	469,319	872,345
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 3,012	¥ 21,202
Held-to-maturity debt securities, Number of securities \| Securities	281	457
Commercial Mortgage-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 182,887	¥ 42,126
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	3,087	678
Available-for-sale debt securities, Fair value, 12 months or more	1,304	57,167
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	2	1,673
Available-for-sale debt securities, Fair value, Total	184,191	99,293
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 3,089	¥ 2,351
Available-for-sale debt securities, Number of securities \| Securities	39	104
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 10,281	¥ 3,154
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	32	37
Held-to-maturity debt securities, Fair value, 12 months or more	133,791	155,011
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	285	1,995
Held-to-maturity debt securities, Fair value, Total	144,072	158,165
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 317	¥ 2,032
Held-to-maturity debt securities, Number of securities \| Securities	31	32
Asset-backed Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 189,775	¥ 164,738
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	503	2,553
Available-for-sale debt securities, Fair value, 12 months or more	86,605
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	620
Available-for-sale debt securities, Fair value, Total	276,380	164,738
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,123	¥ 2,553
Available-for-sale debt securities, Number of securities \| Securities	94	87
Held-to-maturity debt securities, Fair value, Less than 12 months	¥ 637,201	¥ 1,423,048
Held-to-maturity debt securities, Gross unrealized losses, Less than 12 months	8,536	10,196
Held-to-maturity debt securities, Fair value, 12 months or more	1,259,720	241,233
Held-to-maturity debt securities, Gross unrealized losses, 12 months or more	19,180	1,651
Held-to-maturity debt securities, Fair value, Total	1,896,921	1,664,281
Held-to-maturity debt securities, Gross unrealized losses, Total	¥ 27,716	¥ 11,847
Held-to-maturity debt securities, Number of securities \| Securities	77	102
Other Debt Securities [Member]
Investment Securities [Line Items]
Available-for-sale debt securities, Fair value, Less than 12 months	¥ 53,070	¥ 77,660
Available-for-sale debt securities, Gross unrealized losses, Less than 12 months	132	549
Available-for-sale debt securities, Fair value, 12 months or more	30,657	37,027
Available-for-sale debt securities, Gross unrealized losses, 12 months or more	1,824	2,369
Available-for-sale debt securities, Fair value, Total	83,727	114,687
Available-for-sale debt securities, Gross unrealized losses, Total	¥ 1,956	¥ 2,918
Available-for-sale debt securities, Number of securities \| Securities	24	38

Investment Securities (Net Real

Investment Securities (Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities still held) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Net losses recognized during the period	[1]	¥ (639,813)	¥ (278,746)
Less: Net losses recognized during the period on equity securities sold during the period		(37,541)	(3,303)
Net unrealized losses recognized during the reporting period still held at the reporting date		¥ (602,272)	¥ (275,443)

[1]	Included in Investment securities gains (losses)—net.

Investment Securities (Carrying

Investment Securities (Carrying Value of Nonmarketable Equity Securities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Nonmarketable Equity Securities [Member] \| Measurement Alternative [Member]
Investment Securities [Line Items]
Balance	¥ 534,882	¥ 563,733

Investment Securities (Related

Investment Securities (Related Adjustments for Nonmarketable Equity Securities) (Detail) - Nonmarketable Equity Securities [Member] - Measurement Alternative [Member] - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Investment Securities [Line Items]
Impairment losses	[1],[2]	¥ (3,099)	¥ (2,292)
Downward changes for observable prices	[1],[3],[4],[5]	(953)
Upward changes for observable prices	[1],[3],[5],[6]	6,223	53,077
Cumulative impairment losses		5,007	2,292
Cumulative downward changes for observable prices		953
Cumulative upward changes for observable prices		¥ 34,466	¥ 53,077

[1]	Included in Investment securities gains (losses)—net.
[2]	The cumulative impairment losses at March 31, 2019 and 2020 were ¥2,292 million and ¥5,007 million, respectively.
[3]	The MUFG Group applied measurement alternative downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.
[4]	The cumulative downward changes for observable prices at March 31, 2019 and 2020 were nil and ¥953 million, respectively.
[5]	Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer.
[6]	The cumulative upward changes for observable prices at March 31, 2019 and 2020 were ¥53,077 million and ¥34,466 million, respectively.

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses (Narrative) (Detail) - JPY (¥) ¥ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Commitments to extend credit to customers with TDRs	¥ 90,097	¥ 169,819		¥ 90,097	¥ 169,819
Allowance for credit losses	809,540	658,184	¥ 764,124	809,540	658,184	¥ 764,124	¥ 1,182,188
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year		19,970	(10,760)
Foreign Subsidiaries [Member] \| Covid 19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Effect of recording a provision for credit losses and a provision for off-balance sheet credit instruments, not recognized for the fiscal year	84,000
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(58,000)
Nonperforming Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease from charge-offs in the allowance for credit losses due to loan disposal activity				¥ 19,400		12,200
Increase from recoveries in the allowance for credit losses due to loan disposal activity					¥ 15,100
Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(142,000)
Minimum [Member] \| Covid 19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(80,000)
Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(164,000)
Maximum [Member] \| Covid 19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(110,000)
Close Watch [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accruing loans contractually past due, in day				90 days	90 days
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings				1 through 15
Significant sales of loans				¥ 2,136,000	¥ 1,769,000	1,409,000
Allowance for credit losses	482,275	389,615	491,098	482,275	¥ 389,615	491,098	900,686
Commercial [Member] \| Covid 19 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	46,000			¥ 46,000
Commercial [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month				1 month
Loans contractually past due before becoming defaulted loans, period				1 month
Commercial [Member] \| Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day				90 days
Commercial [Member] \| Normal [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings				1 through 9
Commercial [Member] \| Close Watch [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings				10 through 12
Commercial [Member] \| Close Watch [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accruing loans contractually past due, in day				90 days	90 days
Commercial [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Internal borrower ratings				13 through 15
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	34,746	38,626	42,546	¥ 34,746	¥ 38,626	42,546	67,336
Residential [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month				6 months
Loans contractually past due before becoming defaulted loans, period				6 months
Residential [Member] \| Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Temporary extensions of maturity dates to nonaccrual loans, in day				90 days
Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	35,180	32,550	32,119	¥ 35,180	32,550	32,119	30,165
Card [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month				3 months
Loans contractually past due before becoming defaulted loans, period				1 month
MUAH [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	58,995	52,581	53,765	¥ 58,995	52,581	53,765	73,733
MUAH [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month				3 months
Loans contractually past due before becoming defaulted loans, period				60 days
Krungsri [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses	¥ 169,626	¥ 144,812	¥ 144,596	¥ 169,626	¥ 144,812	¥ 144,596	¥ 110,268
Krungsri [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans contractually past due before being placed on nonaccrual status, in month				3 months
Loans contractually past due before becoming defaulted loans, period				6 months
Krungsri [Member] \| Special Mention [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative period of loans for categorizing internal borrower ratings, commencing from the contractual due date in month				1 month
Krungsri [Member] \| Substandard or Doubtful or Doubtful of Loss [Member] \| Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative period of loans for categorizing internal borrower ratings, commencing from the contractual due date in month				3 months

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses (Loans by Domicile and Industry of Borrower Segment Classification) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Loans and Leases Receivable Disclosure [Line Items]
Unearned income, unamortized premiums-net and deferred loan fees-net		¥ (350,287)	¥ (304,588)
Total Loans, net	[1]	118,186,739	116,883,941
Loans held for sale		344,790	291,794
Domestic [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		65,053,362	65,156,790
Domestic [Member] \| Manufacturing [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		11,448,778	11,153,996
Domestic [Member] \| Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		733,212	717,664
Domestic [Member] \| Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		12,054,671	11,706,419
Domestic [Member] \| Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		2,585,111	2,653,191
Domestic [Member] \| Wholesale and Retail [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		7,504,561	7,643,397
Domestic [Member] \| Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	5,161,093	5,213,020
Domestic [Member] \| Communication and Information Services [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		1,572,344	1,510,596
Domestic [Member] \| Other Industries [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		8,673,871	8,756,483
Domestic [Member] \| Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		15,319,721	15,802,024
Foreign [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		53,483,664	52,031,739
Total Loans, net		53,079,542	51,678,674
Foreign [Member] \| Governments and Official Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		726,347	841,695
Foreign [Member] \| Banks and Other Financial Institutions [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans	[2]	11,788,225	11,641,373
Foreign [Member] \| Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		32,565,030	31,951,169
Foreign [Member] \| Other [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans		¥ 8,404,062	¥ 7,597,502

[1]	The above table includes loans held for sale of ¥291,794 million and ¥344,790 million at March 31, 2019 and 2020, respectively.
[2]	Loans to so-called “non-bank finance companies” are generally included in the “Banks and other financial institutions” category. Non-bank finance companies are primarily engaged in consumer lending, factoring and credit card businesses.

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses (Nonaccrual Status of Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	[1]	¥ 778,469	¥ 687,670
Loans held for sale placed on nonaccrual status		330	12,702
Loans acquired with deteriorated credit quality placed on nonaccrual status		25,427	6,284
Commercial [Member] \| Domestic [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		312,972	272,777
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		93,776	65,896
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		8,484	9,813
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		21,790	23,152
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		51,195	26,188
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		94,037	94,531
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		994	898
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		10,539	11,955
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		20,234	25,406
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		11,923	14,938
Commercial [Member] \| Foreign [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		127,001	111,002
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		63,998	68,499
Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		61,172	61,419
MUAH [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		35,840	46,549
Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		149,732	127,424
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans		¥ 27,754

[1]	The above table does not include loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively, and loans acquired with deteriorated credit quality of ¥6,284 million and ¥25,427 million at March 31, 2019 and 2020, respectively.

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses (Impaired Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020		Mar. 31, 2019		Mar. 31, 2018	[4]	Mar. 31, 2017
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[1]	¥ 1,031,614		¥ 961,616
Recorded loan balance, Not requiring an allowance for credit losses	[1],[2]	275,215		248,175
Recorded loan balance, Total	[1],[3]	1,306,829		1,209,791
Unpaid principal balance	[1]	1,421,964		1,323,951
Related allowance for credit losses	[1]	443,742		391,154
Accrual TDRs included in impaired loans		646,160	[4]	617,651	[4]	¥ 670,255		¥ 819,819
Impaired loans held for sales		330		12,702
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Accrual TDRs included in impaired loans		505,681		497,013
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		12,906		8,136
Recorded loan balance, Not requiring an allowance for credit losses	[2]
Recorded loan balance, Total	[3]	12,906		8,136
Unpaid principal balance		19,947		14,990
Related allowance for credit losses		4,767		5,450
Commercial [Member] \| Domestic [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		598,737		560,474
Recorded loan balance, Not requiring an allowance for credit losses	[2]	147,890		157,465
Recorded loan balance, Total	[3]	746,627		717,939
Unpaid principal balance		784,298		759,399
Related allowance for credit losses		268,070		227,004
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		375,716		349,597
Recorded loan balance, Not requiring an allowance for credit losses	[2]	32,057		28,189
Recorded loan balance, Total	[3]	407,773		377,786
Unpaid principal balance		414,091		384,306
Related allowance for credit losses		119,070		92,919
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		6,609		8,366
Recorded loan balance, Not requiring an allowance for credit losses	[2]	5,261		5,975
Recorded loan balance, Total	[3]	11,870		14,341
Unpaid principal balance		12,023		14,779
Related allowance for credit losses		5,026		6,574
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		20,739		20,848
Recorded loan balance, Not requiring an allowance for credit losses	[2]	28,928		29,961
Recorded loan balance, Total	[3]	49,667		50,809
Unpaid principal balance		55,303		55,943
Related allowance for credit losses		6,649		5,704
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		55,293		30,239
Recorded loan balance, Not requiring an allowance for credit losses	[2]	13,114		13,020
Recorded loan balance, Total	[3]	68,407		43,259
Unpaid principal balance		72,708		46,838
Related allowance for credit losses		40,987		20,059
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		113,288		118,253
Recorded loan balance, Not requiring an allowance for credit losses	[2]	38,897		45,620
Recorded loan balance, Total	[3]	152,185		163,873
Unpaid principal balance		160,508		175,714
Related allowance for credit losses		80,996		84,503
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		1,069		1,012
Recorded loan balance, Not requiring an allowance for credit losses	[2]	39		21
Recorded loan balance, Total	[3]	1,108		1,033
Unpaid principal balance		1,262		1,033
Related allowance for credit losses		855		830
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		7,971		8,794
Recorded loan balance, Not requiring an allowance for credit losses	[2]	5,808		6,929
Recorded loan balance, Total	[3]	13,779		15,723
Unpaid principal balance		14,698		16,587
Related allowance for credit losses		6,009		6,817
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		10,558		13,772
Recorded loan balance, Not requiring an allowance for credit losses	[2]	16,449		17,989
Recorded loan balance, Total	[3]	27,007		31,761
Unpaid principal balance		33,229		38,342
Related allowance for credit losses		6,434		6,874
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		7,494		9,593
Recorded loan balance, Not requiring an allowance for credit losses	[2]	7,337		9,761
Recorded loan balance, Total	[3]	14,831		19,354
Unpaid principal balance		20,476		25,857
Related allowance for credit losses		2,044		2,724
Commercial [Member] \| Foreign [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses		141,897		127,521
Recorded loan balance, Not requiring an allowance for credit losses	[2]	56,464		34,484
Recorded loan balance, Total	[3]	198,361		162,005
Unpaid principal balance		220,283		183,133
Related allowance for credit losses		96,009		85,966
Residential [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	88,075		97,176
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	4,822		6,495
Recorded loan balance, Total	[3],[5]	92,897		103,671
Unpaid principal balance	[5]	107,629		120,526
Related allowance for credit losses	[5]	12,770		14,357
Accrual TDRs included in impaired loans		28,450		34,449
Card [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	65,240		64,691
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	280		330
Recorded loan balance, Total	[3],[5]	65,520		65,021
Unpaid principal balance	[5]	72,714		72,226
Related allowance for credit losses	[5]	19,799		21,829
Accrual TDRs included in impaired loans		25,492		26,183
MUAH [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	33,884		46,552
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	33,835		23,208
Recorded loan balance, Total	[3],[5]	67,719		69,760
Unpaid principal balance	[5]	84,737		83,300
Related allowance for credit losses	[5]	5,977		8,294
Accrual TDRs included in impaired loans		42,910		33,155
Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	68,126		57,066
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	30,833		26,193
Recorded loan balance, Total	[3],[5]	98,959		83,259
Unpaid principal balance	[5]	106,265		90,377
Related allowance for credit losses	[5]	30,198		28,254
Accrual TDRs included in impaired loans		35,226		26,851
Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded loan balance, Requiring an allowance for credit losses	[5]	22,749
Recorded loan balance, Not requiring an allowance for credit losses	[2],[5]	1,091
Recorded loan balance, Total	[3],[5]	23,840
Unpaid principal balance	[5]	26,091
Related allowance for credit losses	[5]	6,152
Accrual TDRs included in impaired loans		¥ 8,401

[1]	In addition to impaired loans presented in the above table, there were impaired loans held for sale of ¥12,702 million and ¥330 million at March 31, 2019 and 2020, respectively.
[2]	These loans do not require an allowance for credit losses because the recorded loan balance equals, or does not exceed, the present value of expected future cash flows discounted at the loans’ original effective interest rate, loans’ observable market price, or the fair value of the collateral if the loan is a collateral-dependent loan.
[3]	Included in impaired loans at March 31, 2019 and 2020 are accrual TDRs as follows: ¥497,013 million and ¥505,681 million—Commercial; ¥34,449 million and ¥28,450 million—Residential; ¥26,183 million and ¥25,492 million—Card; ¥33,155 million and ¥42,910 million—MUFG Americas Holdings; ¥26,851 million and ¥35,226 million—Krungsri; and nil and ¥8,401 million—Other, respectively.
[4]	For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. For the fiscal year ended March 31, 2020, lease receivables of ¥3,647 million and ¥465 million in the Krungsri segment, and ¥68 million and nil in the Other segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥6,946 million and ¥3,810 million in the Krungsri segment, and ¥66 million and nil in the Other segment are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2020.
[5]	Impaired Loans for Residential, Card, MUAH, Krungsri and Other segments in the above table include loans acquired with deteriorated credit quality.

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses (Average Recorded Loan Balance and Recognized Interest Income on Impaired Loans by Class) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	¥ 1,260,791	¥ 1,262,339	¥ 1,484,095
Recognized interest income	22,871	26,213	23,625
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	9,395	7,814	8,591
Recognized interest income	74	182	492
Commercial [Member] \| Domestic [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	726,794	766,847	918,093
Recognized interest income	8,722	12,383	9,441
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	387,470	387,725	472,081
Recognized interest income	4,085	6,057	3,787
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	13,093	15,721	19,465
Recognized interest income	218	291	281
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	48,740	57,850	74,087
Recognized interest income	731	1,069	1,146
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	58,704	48,945	59,916
Recognized interest income	759	1,044	794
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	157,751	171,687	186,356
Recognized interest income	2,195	2,848	2,347
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	1,094	1,330	1,729
Recognized interest income	6	8	8
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	14,804	22,478	25,461
Recognized interest income	322	491	388
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	28,345	39,178	50,377
Recognized interest income	170	234	215
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	16,793	21,933	28,621
Recognized interest income	236	341	475
Commercial [Member] \| Foreign [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	174,831	159,999	209,297
Recognized interest income	3,013	3,127	4,244
Residential [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	98,238	107,165	119,409
Recognized interest income	1,252	1,620	1,563
Card [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	65,270	66,187	69,831
Recognized interest income	1,241	1,614	1,993
MUAH [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	82,832	71,162	83,504
Recognized interest income	2,801	2,292	1,993
Krungsri [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	91,577	83,165	75,370
Recognized interest income	5,274	4,995	3,899
Other [Member]
Financing Receivable, Impaired [Line Items]
Average recorded loan balance	11,854
Recognized interest income	¥ 494

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses (Roll-forward of Accrual TDRs and Other Impaired Loans) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020		Mar. 31, 2019		Mar. 31, 2018
Accrual TDRs:
Balance at beginning of fiscal year		¥ 617,651	[1]	¥ 670,255	[1]	¥ 819,819
Additions (new accrual TDR status)	[1]	171,740		71,033		144,368
Transfers to other impaired loans (including nonaccrual TDRs)		(39,646)		(19,053)		(25,122)
Loans sold		(11,220)		(26)		(39,378)
Principal payments and other		(92,365)		(104,558)		(229,432)
Balance at end of fiscal year	[1]	646,160		617,651		670,255
Other impaired loans (including nonaccrual TDRs):
Balance at beginning of fiscal year		592,140	[1]	660,868	[1]	896,031
Additions (new other impaired loans (including nonaccrual TDRs) status)	[1],[2]	373,091		222,003		281,275
Charge-off		(52,935)		(55,309)		(98,355)
Transfers to accrual TDRs		(45,310)		(22,110)		(43,858)
Loans sold		(29,928)		(26,022)		(31,581)
Principal payments and other		(176,389)		(187,290)		(342,644)
Balance at end of fiscal year	[1]	660,669		592,140		660,868
Card [Member]
Accrual TDRs:
Balance at beginning of fiscal year		26,183
Balance at end of fiscal year		25,492		26,183
Other impaired loans (including nonaccrual TDRs):
Additions of nonaccrual TDRs		14,685		13,493		12,002
MUAH [Member]
Accrual TDRs:
Balance at beginning of fiscal year		33,155
Balance at end of fiscal year		42,910		33,155
Other impaired loans (including nonaccrual TDRs):
Additions of nonaccrual TDRs		15,135		12,738		12,799
Krungsri [Member]
Accrual TDRs:
Balance at beginning of fiscal year		26,851
Balance at end of fiscal year		35,226		26,851
Lease receivables reported as accrual TDRs but excluded from "Additions" as impaired loans		3,647		2,947		1,809
Lease receivables excluded from accrual TDRs as impaired loans		6,946		5,060		4,282
Other impaired loans (including nonaccrual TDRs):
Lease receivables reported as nonaccrual TDRs but excluded from "Additions" as impaired loans		465		2,088		113
Lease receivables excluded from other impaired loans		3,810		3,361		1,286
Additions of nonaccrual TDRs		9,828		10,519		12,280
Other [Member]
Accrual TDRs:
Balance at beginning of fiscal year
Balance at end of fiscal year		8,401
Lease receivables reported as accrual TDRs but excluded from "Additions" as impaired loans		68
Lease receivables excluded from accrual TDRs as impaired loans		66
Other impaired loans (including nonaccrual TDRs):
Lease receivables reported as nonaccrual TDRs but excluded from "Additions" as impaired loans
Lease receivables excluded from other impaired loans
Additions of nonaccrual TDRs		¥ 1,031

[1]	For the fiscal year ended March 31, 2018, lease receivables of ¥1,809 million and ¥113 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥4,282 million and ¥1,286 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2018. For the fiscal year ended March 31, 2019, lease receivables of ¥2,947 million and ¥2,088 million in the Krungsri segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥5,060 million and ¥3,361 million, are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2019. For the fiscal year ended March 31, 2020, lease receivables of ¥3,647 million and ¥465 million in the Krungsri segment, and ¥68 million and nil in the Other segment, which were accrual TDRs and nonaccrual TDRs, respectively, are excluded from the additions of accrual TDRs and other impaired loans, respectively, and the related ending balances of such TDRs amounting to ¥6,946 million and ¥3,810 million in the Krungsri segment, and ¥66 million and nil in the Other segment are also excluded from the balance of accrual TDRs and other impaired loans, respectively, as of March 31, 2020.
[2]	Included in the additions of other impaired loans for the fiscal years ended March 31, 2018, 2019 and 2020 are nonaccrual TDRs as follows: ¥12,002 million, ¥13,493 million and ¥14,685 million—Card; ¥12,799 million, ¥12,738 million and ¥15,135 million—MUFG Americas Holdings; ¥12,280 million, ¥10,519 million and ¥9,828 million—Krungsri; and nil, nil and ¥1,031 million—Other, respectively.

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses (Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment		¥ 217,911	¥ 113,728	¥ 187,694
Troubled debt restructurings, Post-modification outstanding recorded investment		216,599	112,818	183,371
Troubled debt restructurings that subsequently defaulted, Recorded Investment		26,521	23,081	15,771
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	10,786	50
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	10,786	50
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]
Commercial [Member] \| Domestic [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	61,735	36,693	70,380
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	61,735	36,693	69,021
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	8,857	11,002	4,067
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	27,435	11,654	35,954
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	27,435	11,654	35,954
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	3,094	312	839
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	289	703	1,020
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	289	703	1,020
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	6	89
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	2,714	948	1,269
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	2,714	948	1,269
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	73		10
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	6,487	2,141	4,139
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	6,487	2,141	4,139
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	43	473	822
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	20,813	19,315	16,280
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	20,813	19,315	14,921
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	5,421	1,713	2,231
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]			246
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]			246
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	376	268	9,643
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	376	268	9,643
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	9	8,365	140
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	3,279	472	761
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	3,279	472	761
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	123	50
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	342	1,192	1,068
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	342	1,192	1,068
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	88		25
Commercial [Member] \| Foreign [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	39,827	5,692	25,522
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	39,827	5,692	25,522
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	2,337
Residential [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[2]	5,137	7,379	9,763
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[2]	5,137	7,379	9,763
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[2]	31	362	159
Card [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	22,625	19,685	17,436
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	21,561	18,837	16,912
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	3,320	3,442	4,191
MUAH [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	33,782	19,837	40,578
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	33,564	19,837	38,224
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	4,656	349	2,565
Krungsri [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	31,238	24,392	24,015
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	31,209	24,330	23,929
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	7,305	7,926	4,789
Other [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, Pre-modification outstanding recorded investment	[1],[3]	12,781
Troubled debt restructurings, Post-modification outstanding recorded investment	[1],[3]	12,780
Troubled debt restructurings that subsequently defaulted, Recorded Investment	[1],[3]	¥ 15

[1]	For the fiscal year ended March 31, 2018, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and payment deferrals were the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2019, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential and Krungsri segments, reduction in the stated rate was the primary concession type in the Card segment and forbearance was the primary concession type in the MUFG Americas Holdings segment. For the fiscal year ended March 31, 2020, extension of the stated maturity date of loans was the primary concession type in the Commercial, Residential, MUFG Americas Holdings and Krungsri segments and reduction in the stated rate was the primary concession type in the Card and Other segments.
[2]	TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans.
[3]	TDRs for the Card, MUFG Americas Holdings, Krungsri and Other segments include accrual and nonaccrual loans.

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses (Outstanding Recorded Investment Balances of Troubled Debt Restructurings by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		¥ 748,158	¥ 707,591
Commercial [Member] \| Domestic [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	433,783	445,312
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	313,996	311,890
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	3,435	4,591
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	27,877	27,657
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	17,287	17,135
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	58,148	69,350
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	113	135
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	3,244	3,780
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	6,775	6,357
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	2,908	4,417
Commercial [Member] \| Foreign [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	71,898	51,701
Residential [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[1]	28,450	34,449
Card [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	65,520	65,021
MUAH [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	62,151	48,128
Krungsri [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	76,831	62,980
Other [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances	[2]	9,525
Nonaccrual [Member] \| Card [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		40,028	38,838
Nonaccrual [Member] \| MUAH [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		19,241	14,973
Nonaccrual [Member] \| Krungsri [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		34,659	31,069
Nonaccrual [Member] \| Other [Member]
Financing Receivable, Modifications [Line Items]
TDRs, Outstanding recorded investment balances		¥ 1,058

[1]	TDRs for the Commercial and Residential segments include accruing loans, and do not include nonaccrual loans.
[2]	TDRs for the Card, MUFG Americas Holdings, Krungsri and Other segments include accrual and nonaccrual loans. Included in the outstanding recorded investment balances as of March 31, 2019 and 2020 are nonaccrual TDRs as follows: ¥38,838 million and ¥40,028 million—Card; ¥14,973 million and ¥19,241 million—MUFG Americas Holdings; ¥31,069 million and ¥34,659 million—Krungsri; and nil and ¥1,058 million—Other, respectively.

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses (Credit Quality Indicators of Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	¥ 86,622,787	¥ 86,971,280
Commercial [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		84,423,185	84,821,880
Commercial [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,832,306	1,815,762
Commercial [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		367,296	333,638
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	36,972	26,245
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		8,255	11,622
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		9,739	10,833
Commercial [Member] \| Loans Acquired with Deteriorated Credit Quality [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		18,978	3,790
Commercial [Member] \| Domestic [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	51,102,178	50,851,811
Commercial [Member] \| Domestic [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		49,695,889	49,391,991
Commercial [Member] \| Domestic [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,186,044	1,242,075
Commercial [Member] \| Domestic [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		220,245	217,745
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	11,372,874	11,147,363
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		10,997,241	10,819,594
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		317,018	279,801
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		58,615	47,968
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	731,768	717,245
Commercial [Member] \| Domestic [Member] \| Construction [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		696,491	672,152
Commercial [Member] \| Domestic [Member] \| Construction [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		28,350	37,236
Commercial [Member] \| Domestic [Member] \| Construction [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		6,927	7,857
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	12,001,519	11,648,919
Commercial [Member] \| Domestic [Member] \| Real Estate [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		11,790,467	11,403,613
Commercial [Member] \| Domestic [Member] \| Real Estate [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		190,972	222,791
Commercial [Member] \| Domestic [Member] \| Real Estate [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		20,080	22,515
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	2,570,863	2,631,226
Commercial [Member] \| Domestic [Member] \| Services [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		2,390,210	2,436,489
Commercial [Member] \| Domestic [Member] \| Services [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		158,851	174,784
Commercial [Member] \| Domestic [Member] \| Services [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		21,802	19,953
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	7,497,841	7,638,786
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		7,124,098	7,240,801
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		301,965	329,249
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		71,778	68,736
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	5,160,483	5,208,441
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		5,146,320	5,199,889
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		13,237	7,654
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		926	898
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	1,572,133	1,510,366
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,530,887	1,465,652
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		32,366	34,542
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		8,880	10,172
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	8,672,249	8,754,992
Commercial [Member] \| Domestic [Member] \| Other Industries [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		8,540,144	8,610,464
Commercial [Member] \| Domestic [Member] \| Other Industries [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		112,813	119,581
Commercial [Member] \| Domestic [Member] \| Other Industries [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		19,292	24,947
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	1,522,448	1,594,473
Commercial [Member] \| Domestic [Member] \| Consumer [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,480,031	1,543,337
Commercial [Member] \| Domestic [Member] \| Consumer [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		30,472	36,437
Commercial [Member] \| Domestic [Member] \| Consumer [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		11,945	14,699
Commercial [Member] \| Foreign [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	35,483,637	36,093,224
Commercial [Member] \| Foreign [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		34,719,041	35,418,267
Commercial [Member] \| Foreign [Member] \| Close Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		636,523	562,854
Commercial [Member] \| Foreign [Member] \| Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		128,073	112,103
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	13,318,490	13,728,084
Residential [Member] \| Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		13,256,744	13,661,794
Residential [Member] \| Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		61,746	66,290
Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	565,643	578,582
Card [Member] \| Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		504,357	516,983
Card [Member] \| Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		61,286	61,599
MUAH [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1],[2]	9,655,468	9,607,563
FDIC covered loans acquired with deteriorated credit quality and small business loans which are not individually rated		365	689
MUAH [Member] \| Credit Quality Based on the Number of Delinquencies [Member] \| Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		4,590,805	4,752,021
MUAH [Member] \| Credit Quality Based on the Number of Delinquencies [Member] \| Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		15,119	15,540
MUAH [Member] \| Credit Quality Based on Internal Credit Ratings [Member] \| Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		4,877,863	4,699,698
MUAH [Member] \| Credit Quality Based on Internal Credit Ratings [Member] \| Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		87,648	51,948
MUAH [Member] \| Credit Quality Based on Internal Credit Ratings [Member] \| Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		84,033	88,356
Krungsri [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	6,911,590	6,010,537
Krungsri [Member] \| Normal [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		6,513,615	5,682,245
Krungsri [Member] \| Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		246,328	199,070
Krungsri [Member] \| Substandard or Doubtful or Doubtful of Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		151,647	¥ 129,222
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade	[1]	1,117,893
Other [Member] \| Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		1,086,517
Other [Member] \| Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans classified by borrowing grade		¥ 31,376

[1]	Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.
[2]	Total loans of MUFG Americas Holdings do not include FDIC covered loans which are not individually rated totaling ¥689 million and ¥365 million as of March 31, 2019 and 2020, respectively. The MUFG Group will be reimbursed for a substantial portion of any future losses on FDIC covered loans under the terms of the FDIC loss share agreements.

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses (Ages of Past Due Loans by Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 553,956	¥ 472,758
Loans, current		117,571,069	116,369,874
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	118,125,025	116,842,632
Loans, greater than 90 days past due and accruing		13,273	16,007
1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		290,028	257,330
Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		263,928	215,428
Commercial [Member] \| Domestic [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		36,186	42,199
Loans, current		51,065,992	50,809,612
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	51,102,178	50,851,811
Loans, greater than 90 days past due and accruing		4,720	6,900
Commercial [Member] \| Domestic [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		9,215	11,551
Commercial [Member] \| Domestic [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		26,971	30,648
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		3,582	4,633
Loans, current		11,369,292	11,142,730
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	11,372,874	11,147,363
Loans, greater than 90 days past due and accruing		620
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		820	1,597
Commercial [Member] \| Domestic [Member] \| Manufacturing [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,762	3,036
Commercial [Member] \| Domestic [Member] \| Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		243	278
Loans, current		731,525	716,967
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	731,768	717,245
Loans, greater than 90 days past due and accruing			1
Commercial [Member] \| Domestic [Member] \| Construction [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		143	218
Commercial [Member] \| Domestic [Member] \| Construction [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		100	60
Commercial [Member] \| Domestic [Member] \| Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		4,180	6,290
Loans, current		11,997,339	11,642,629
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	12,001,519	11,648,919
Loans, greater than 90 days past due and accruing		1,181	2,524
Commercial [Member] \| Domestic [Member] \| Real Estate [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		880	2,034
Commercial [Member] \| Domestic [Member] \| Real Estate [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		3,300	4,256
Commercial [Member] \| Domestic [Member] \| Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		1,720	1,347
Loans, current		2,569,143	2,629,879
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	2,570,863	2,631,226
Loans, greater than 90 days past due and accruing		5	1
Commercial [Member] \| Domestic [Member] \| Services [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		812	778
Commercial [Member] \| Domestic [Member] \| Services [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		908	569
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		5,201	5,181
Loans, current		7,492,640	7,633,605
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	7,497,841	7,638,786
Loans, greater than 90 days past due and accruing		19	62
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,598	2,791
Commercial [Member] \| Domestic [Member] \| Wholesale and Retail [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		2,603	2,390
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		54	21
Loans, current		5,160,429	5,208,420
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	5,160,483	5,208,441
Loans, greater than 90 days past due and accruing
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due
Commercial [Member] \| Domestic [Member] \| Banks and Other Financial Institutions [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		54	21
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		393	1,169
Loans, current		1,571,740	1,509,197
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,572,133	1,510,366
Loans, greater than 90 days past due and accruing
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		336	411
Commercial [Member] \| Domestic [Member] \| Communication and Information Services [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		57	758
Commercial [Member] \| Domestic [Member] \| Other Industries [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		13,060	13,402
Loans, current		8,659,189	8,741,590
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	8,672,249	8,754,992
Loans, greater than 90 days past due and accruing		97
Commercial [Member] \| Domestic [Member] \| Other Industries [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		171	365
Commercial [Member] \| Domestic [Member] \| Other Industries [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		12,889	13,037
Commercial [Member] \| Domestic [Member] \| Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		7,753	9,878
Loans, current		1,514,695	1,584,595
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,522,448	1,594,473
Loans, greater than 90 days past due and accruing		2,798	4,312
Commercial [Member] \| Domestic [Member] \| Consumer [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		3,455	3,357
Commercial [Member] \| Domestic [Member] \| Consumer [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		4,298	6,521
Commercial [Member] \| Foreign [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		33,475	30,874
Loans, current		35,450,162	36,062,350
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	35,483,637	36,093,224
Loans, greater than 90 days past due and accruing		164	236
Commercial [Member] \| Foreign [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		9,927	10,881
Commercial [Member] \| Foreign [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		23,548	19,993
Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		63,847	79,301
Loans, current		13,248,278	13,641,449
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	13,312,125	13,720,750
Loans, greater than 90 days past due and accruing		6,288	6,584
Residential [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		48,404	62,686
Residential [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		15,443	16,615
Card [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		44,732	47,771
Loans, current		518,008	527,421
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	562,740	575,192
Loans, greater than 90 days past due and accruing
Card [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		14,735	17,203
Card [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		29,997	30,568
MUAH [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		45,487	39,523
Loans, current		9,603,339	9,557,501
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	9,648,826	9,597,024
Loans, greater than 90 days past due and accruing		2,101	2,287
MUAH [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		31,052	28,696
MUAH [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		14,435	10,827
Krungsri [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		289,439	233,090
Loans, current		6,616,104	5,771,541
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	6,905,543	6,004,631
Loans, greater than 90 days past due and accruing
Krungsri [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		160,253	126,313
Krungsri [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		129,186	¥ 106,777
Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		40,790
Loans, current		1,069,186
Loans, excluding loans held for sale and loans acquired with deteriorated credit quality	[1]	1,109,976
Loans, greater than 90 days past due and accruing
Other [Member] \| 1 to 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		16,442
Other [Member] \| Greater than 3 Months Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, past due		¥ 24,348

[1]	Total loans in the above table do not include loans held for sale and loans acquired with deteriorated credit quality and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses (Changes in Allowance for Credit Losses by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		¥ 658,184	¥ 764,124	¥ 1,182,188
Provision for (reversal of) credit losses		321,713	34,330	(240,847)
Charge-offs		243,135	174,041	232,109
Recoveries		63,858	44,117	51,110
Net charge-offs		179,277	129,924	180,999
Other	[1]	8,920	(10,346)	3,782
Balance at end of fiscal year		809,540	658,184	764,124
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		389,615	491,098	900,686
Provision for (reversal of) credit losses		153,782	(43,850)	(297,401)
Charge-offs		85,326	76,664	134,807
Recoveries		26,427	17,565	24,913
Net charge-offs		58,899	59,099	109,894
Other	[1]	(2,223)	1,466	(2,293)
Balance at end of fiscal year		482,275	389,615	491,098
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		38,626	42,546	67,336
Provision for (reversal of) credit losses		(1,028)	(4,480)	(22,291)
Charge-offs		3,227	274	3,838
Recoveries		375	834	1,339
Net charge-offs		2,852	(560)	2,499
Other	[1]
Balance at end of fiscal year		34,746	38,626	42,546
Card [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		32,550	32,119	30,165
Provision for (reversal of) credit losses		26,542	23,809	23,422
Charge-offs		25,149	24,310	22,696
Recoveries		1,237	932	1,228
Net charge-offs		23,912	23,378	21,468
Other	[1]
Balance at end of fiscal year		35,180	32,550	32,119
MUAH [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		52,581	53,765	73,733
Provision for (reversal of) credit losses		30,825	9,277	(9,309)
Charge-offs		27,934	13,224	14,701
Recoveries		4,173	3,733	6,140
Net charge-offs		23,761	9,491	8,561
Other	[1]	(650)	(970)	(2,098)
Balance at end of fiscal year		58,995	52,581	53,765
Krungsri [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year		144,812	144,596	110,268
Provision for (reversal of) credit losses		70,023	49,574	64,732
Charge-offs		77,907	59,569	56,067
Recoveries		23,170	21,053	17,490
Net charge-offs		54,737	38,516	38,577
Other	[1]	9,528	(10,842)	8,173
Balance at end of fiscal year		169,626	144,812	¥ 144,596
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of fiscal year
Provision for (reversal of) credit losses		41,569
Charge-offs		23,592
Recoveries		8,476
Net charge-offs		15,116
Other	[1]	2,265
Balance at end of fiscal year		¥ 28,718

[1]	Other is principally comprised of gains or losses from foreign exchange translation.

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses (Allowance for Credit Losses and Recorded Investment in Loans by Portfolio Segment) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Allowance for credit losses:
Individually evaluated for impairment		¥ 437,777	¥ 385,522
Collectively evaluated for impairment		359,579	258,298
Loans acquired with deteriorated credit quality	[1]	12,184	14,364
Total		809,540	658,184	¥ 764,124	¥ 1,182,188
Loans:
Individually evaluated for impairment		1,286,918	1,200,663
Collectively evaluated for impairment		116,838,107	115,641,969
Loans acquired with deteriorated credit quality	[1]	67,211	54,103
Total	[2]	118,192,236	116,896,735
Commercial [Member]
Allowance for credit losses:
Individually evaluated for impairment		364,079	312,970
Collectively evaluated for impairment		108,100	63,366
Loans acquired with deteriorated credit quality	[1]	10,096	13,279
Total		482,275	389,615	491,098	900,686
Loans:
Individually evaluated for impairment		944,988	879,944
Collectively evaluated for impairment		85,640,827	86,065,091
Loans acquired with deteriorated credit quality	[1]	36,972	26,245
Total	[2]	86,622,787	86,971,280
Residential [Member]
Allowance for credit losses:
Individually evaluated for impairment		12,651	14,175
Collectively evaluated for impairment		21,130	23,413
Loans acquired with deteriorated credit quality	[1]	965	1,038
Total		34,746	38,626	42,546	67,336
Loans:
Individually evaluated for impairment		92,448	102,948
Collectively evaluated for impairment		13,219,677	13,617,802
Loans acquired with deteriorated credit quality	[1]	6,365	7,334
Total	[2]	13,318,490	13,728,084
Card [Member]
Allowance for credit losses:
Individually evaluated for impairment		19,799	21,829
Collectively evaluated for impairment		15,369	10,708
Loans acquired with deteriorated credit quality	[1]	12	13
Total		35,180	32,550	32,119	30,165
Loans:
Individually evaluated for impairment		65,292	64,752
Collectively evaluated for impairment		497,448	510,440
Loans acquired with deteriorated credit quality	[1]	2,903	3,390
Total	[2]	565,643	578,582
MUAH [Member]
Allowance for credit losses:
Individually evaluated for impairment		5,977	8,294
Collectively evaluated for impairment		53,013	44,282
Loans acquired with deteriorated credit quality	[1]	5	5
Total		58,995	52,581	53,765	73,733
Loans:
Individually evaluated for impairment		67,719	69,760
Collectively evaluated for impairment		9,581,107	9,527,264
Loans acquired with deteriorated credit quality	[1]	7,007	11,228
Total	[2]	9,655,833	9,608,252
Krungsri [Member]
Allowance for credit losses:
Individually evaluated for impairment		30,198	28,254
Collectively evaluated for impairment		139,401	116,529
Loans acquired with deteriorated credit quality	[1]	27	29
Total		169,626	144,812	¥ 144,596	¥ 110,268
Loans:
Individually evaluated for impairment		98,959	83,259
Collectively evaluated for impairment		6,806,584	5,921,372
Loans acquired with deteriorated credit quality	[1]	6,047	5,906
Total	[2]	6,911,590	6,010,537
Other [Member]
Allowance for credit losses:
Individually evaluated for impairment		5,073
Collectively evaluated for impairment		22,566
Loans acquired with deteriorated credit quality	[1]	1,079
Total		28,718
Loans:
Individually evaluated for impairment		17,512
Collectively evaluated for impairment		1,092,464
Loans acquired with deteriorated credit quality	[1]	7,917
Total	[2]	¥ 1,117,893

[1]	Loans acquired with deteriorated credit quality in the above table include impaired loans which are individually evaluated for impairment.
[2]	Total loans in the above table do not include loans held for sale, and represent balances without adjustments in relation to unearned income, unamortized premiums and deferred loan fees.

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses (Components of Investment in Direct Financing Leases) (Detail) ¥ in Millions	Mar. 31, 2019JPY (¥)
Financing leases, net investment in direct financing leases:
Minimum lease payments receivable	¥ 1,922,339
Estimated residual values of leased property	27,468
Less—unearned income	(299,283)
Net investment in direct financing leases	¥ 1,650,524

Premises and Equipment (Narrati

Premises and Equipment (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Impairment losses for long-lived assets	¥ 16,575	¥ 31,345	¥ 39,358
Impairment losses recognized for real estate held for sale	¥ 194	411	213
BK [Member]
Property, Plant and Equipment [Line Items]
Impairment losses for long-lived assets			¥ 34,016
Consumer Finance Subsidiary [Member]
Property, Plant and Equipment [Line Items]
Impairment losses for long-lived assets		¥ 21,096

Premises and Equipment (Compone

Premises and Equipment (Components of Premises and Equipment) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment	¥ 2,133,071	¥ 2,180,229
Less accumulated depreciation	1,203,542	1,206,629
Premises and equipment-net	929,529	973,600
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	380,477	362,742
Buildings [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	782,367	829,606
Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	623,676	648,598
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	310,957	305,281
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	¥ 35,594	¥ 34,002

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Narrative) (Detail) - JPY (¥) ¥ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill				¥ 383,810
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year		¥ 19,970	¥ (10,760)
Intangible assets subject to amortization acquired				538,925	¥ 262,700
Intangible assets not subject to amortization acquired				23,804	11,172
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value				3,732	118,108	¥ 21,900
Impairment losses for long-lived assets				16,575	31,345	39,358
Minimum [Member]
Goodwill and Other Intangible Assets [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	¥ (142,000)
Maximum [Member]
Goodwill and Other Intangible Assets [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(164,000)
Covid 19 [Member] \| Minimum [Member]
Goodwill and Other Intangible Assets [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(80,000)
Covid 19 [Member] \| Maximum [Member]
Goodwill and Other Intangible Assets [Line Items]
Decrease in net income attributable to Mitsubishi UFJ Financial Group not recognized for the fiscal year	(110,000)
Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired				¥ 291,821	¥ 262,408
Weighted average amortization periods of intangible assets subject to amortization, years				5 years	6 years
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value					¥ 28,494
Core Deposit Intangibles [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired				¥ 44,140
Weighted average amortization periods of intangible assets subject to amortization, years				10 years
Customer Relationships [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired				¥ 180,414
Weighted average amortization periods of intangible assets subject to amortization, years				17 years
Trade Names [Member]
Goodwill and Other Intangible Assets [Line Items]
Intangible assets subject to amortization acquired				¥ 16,402
Weighted average amortization periods of intangible assets subject to amortization, years				23 years
System Software under Development [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value					87,596
Consumer Finance Subsidiary [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for long-lived assets					21,096
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill				¥ 350,942
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| Danamon [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill				241,356
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| Krungsri [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill				62,157
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| MUAH [Member] \| Covid 19 [Member] \| Minimum [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill not recognized for the fiscal year	80,000
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| MUAH [Member] \| Covid 19 [Member] \| Maximum [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill not recognized for the fiscal year	¥ 110,000
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group and Global Corporate & Investment Banking Business Group [Member] \| MUAH [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses on goodwill				¥ 80,297
Operating Segments [Member] \| Customer Business [Member] \| Trust Assets Business Group [Member] \| Customer Relationships [Member] \| Foreign [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value						¥ 11,121
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member] \| Consumer Finance Subsidiary [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for long-lived assets					21,096
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member] \| Consumer Finance Subsidiary [Member] \| Software [Member]
Goodwill and Other Intangible Assets [Line Items]
Impairment losses for intangible assets, whose carrying amounts exceeded their fair value					¥ 137,186

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Movement in Carrying Amount of Goodwill by Business Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Goodwill [Line Items]
Goodwill acquired during the fiscal year	[1]	¥ 473,500
Impairment loss		(383,810)
Foreign currency translation adjustments and other		(5,955)	¥ (7,443)
Goodwill		1,093,554	626,009	¥ 633,452	[2],[3]
Accumulated impairment losses		(575,928)	(192,118)	(192,118)	[2]
Goodwill, Net, at end of fiscal year		517,626	433,891	441,334
Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri [Member]
Goodwill [Line Items]
Goodwill, Fully impaired before April 1, 2017		1,900,019
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member]
Goodwill [Line Items]
Goodwill acquired during the fiscal year	[1]	34,553
Impairment loss		(32,868)
Foreign currency translation adjustments and other		(1,354)	(1,898)
Goodwill		138,538	105,339	107,237	[2],[3]
Accumulated impairment losses		(32,868)
Goodwill, Net, at end of fiscal year		105,670	105,339	107,237
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member] \| As Previously Reported [Member]
Goodwill [Line Items]
Foreign currency translation adjustments and other
Goodwill
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member]
Goodwill [Line Items]
Goodwill acquired during the fiscal year	[1]	260,639
Impairment loss		(350,942)
Foreign currency translation adjustments and other		(12,877)	(5,308)
Goodwill		738,645	490,883	496,191	[2],[3]
Accumulated impairment losses		(528,692)	(177,750)	(177,750)	[2]
Goodwill, Net, at end of fiscal year		209,953	313,133	318,441
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| As Previously Reported [Member]
Goodwill [Line Items]
Foreign currency translation adjustments and other			(7,206)
Goodwill			596,222	603,428
Operating Segments [Member] \| Customer Business [Member] \| Asset Management & Investor Services Business Group [Member]
Goodwill [Line Items]
Goodwill acquired during the fiscal year	[1]	178,308
Foreign currency translation adjustments and other		8,276	(237)
Goodwill		214,071	27,487	27,724	[2],[3]
Accumulated impairment losses		(14,368)	(14,368)	(14,368)	[2]
Goodwill, Net, at end of fiscal year		199,703	13,119	13,356
Operating Segments [Member] \| Global Markets Business Group [Member]
Goodwill [Line Items]
Goodwill		2,300	2,300	2,300	[2],[3]
Goodwill, Net, at end of fiscal year		¥ 2,300	¥ 2,300	¥ 2,300

[1]	See Note 2 for the goodwill acquired in connection with acquisitions.
[2]	Effective April 1, 2018, the MUFG Group reorganized its business groups. Goodwill originally recognized for Retail Banking Business Group, Corporate Banking Business Group, Trust Assets Business Group and Global Business Group other than MUAH and Krungsri was ¥1,900,019 million, which has been fully impaired before April 1, 2017. As these impairment losses recorded in past before the reorganization of the segment and are irrelevant to the annual impairment test under the new segment, the accumulated impaired loss is not allocated to new business segments after the reorganization of business group.
[3]	The balance as of March, 31 2018 reflected the organization change in 2018 appropriately and was erroneously disclosed. Such amount has been restated from the amount previously reported as follows:

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Carrying Amount of Other Intangible Assets by Major Class) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Intangible assets subject to amortization:
Gross carrying amount		¥ 3,707,083	¥ 3,304,950
Accumulated amortization		2,505,117	2,403,447
Net carrying amount		1,201,966	901,503
Intangible assets not subject to amortization:
Net carrying amount, Other	[1]	37,560	25,693
Total intangible assets, Net carrying amount		1,239,526	927,196
Mortgage Servicing Rights [Member]
Intangible assets not subject to amortization:
Net carrying amount, Other		29,641	17,431
Software [Member]
Intangible assets subject to amortization:
Gross carrying amount		2,852,273	2,703,413
Accumulated amortization		2,096,635	2,029,775
Net carrying amount		755,638	673,638
Customer Relationships [Member]
Intangible assets subject to amortization:
Gross carrying amount		567,886	387,936
Accumulated amortization		264,636	246,526
Net carrying amount		303,250	141,410
Core Deposit Intangibles [Member]
Intangible assets subject to amortization:
Gross carrying amount		174,802	126,796
Accumulated amortization		100,022	88,643
Net carrying amount		74,780	38,153
Trade Names [Member]
Intangible assets subject to amortization:
Gross carrying amount		94,748	77,204
Accumulated amortization		38,055	34,283
Net carrying amount		56,693	42,921
Other [Member]
Intangible assets subject to amortization:
Gross carrying amount		17,374	9,601
Accumulated amortization		5,769	4,220
Net carrying amount		¥ 11,605	¥ 5,381

[1]	Intangible assets not subject to amortization includes ¥17,431 million and ¥29,641 million of mortgage servicing rights accounted for at fair value at March 31, 2019 and 2020, respectively.

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Estimated Aggregate Amortization Expense for Intangible Assets for Next Five Fiscal Years) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Estimated aggregate amortization expense for intangible assets for the next five fiscal years:
Fiscal year ending March 31, 2021	¥ 263,056
Fiscal year ending March 31, 2022	228,137
Fiscal year ending March 31, 2023	188,358
Fiscal year ending March 31, 2024	150,702
Fiscal year ending March 31, 2025	¥ 108,504

Lease Transactions (Narrative)

Lease Transactions (Narrative) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Leases [Abstract]
Right-of-use assets of finance leases	¥ 18,497
Right-of-use assets of finance leases, in consolidated balance sheets line item	us-gaap:PropertyPlantAndEquipmentNet
Lease liabilities of finance leases	¥ 25,186
Lease liabilities of finance leases, in consolidated balance sheets line item	us-gaap:LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Right-of-use assets of operating leases	¥ 393,435
Right-of-use assets of operating leases, in consolidated balance sheets line item	us-gaap:OtherAssets
Lease liabilities of operating leases	¥ 482,813
Lease liabilities of operating leases, in consolidated balance sheets line item	us-gaap:OtherLiabilities

Lease Transactions (Profit or L

Lease Transactions (Profit or Loss of Lease Transactions as a Lessee) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2020JPY (¥)
Finance lease cost:
Amortization of right-of-use assets	¥ 5,455
Interest on lease liabilities	460
Operating lease cost	¥ 99,939

Lease Transactions (Information

Lease Transactions (Information of Lease Transactions as a Lessee) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	¥ 482
Operating cash flows from operating leases	106,103
Financing cash flows from finance leases	7,090
Right-of-use assets obtained in exchange for new finance lease liabilities	12,754	¥ 11,280	¥ 7,111
Right-of-use assets obtained in exchange for new operating lease liabilities	¥ 46,482
Weighted-average remaining lease term:
Finance leases	4 years 4 months 24 days
Operating leases	9 years 6 months
Weighted-average discount rate:
Finance leases	0.99%
Operating leases	1.16%

Lease Transactions (Maturities

Lease Transactions (Maturities of Lease Liabilities) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Undiscounted total lease payments: Finance leases, maturities in
2021	¥ 7,835
2022	6,794
2023	4,755
2024	3,073
2025	1,304
2026 and thereafter	2,655
Total undiscounted cash flows	26,416
Difference between undiscounted and discounted cash flows: Finance leases	(1,230)
Amount on balance sheet: Finance leases	25,186
Undiscounted total lease payments: Operating leases, maturities in
2021	107,270
2022	80,460
2023	57,057
2024	40,902
2025	35,827
2026 and thereafter	195,540
Total undiscounted cash flows	517,056
Difference between undiscounted and discounted cash flows: Operating leases	(34,243)
Amount on balance sheet: Operating leases	¥ 482,813

Lease Transactions (Profit or_2

Lease Transactions (Profit or Loss of Lease Transactions as a Lessor) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2020JPY (¥)
Operating leases:
Lease income	¥ 7,856
Total	126,866
Direct Financing Lease [Member]
Direct financing leases:
Finance income on net investment	¥ 119,010

Lease Transactions (Component o

Lease Transactions (Component of Direct Financing Lease Transactions) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Leases [Abstract]
Lease receivables (undiscounted)	¥ 2,193,360
Adjustments:
Discounted unguaranteed residual value	15,515
Initial direct cost on direct financing leases	29,562
Deferred selling profit	(364,206)
Net investment in direct financing leases	¥ 1,874,231

Lease Transactions (Maturity of

Lease Transactions (Maturity of the Lease Payment Receivables of Direct Financing Lease Transactions) (Detail) - Direct Financing Lease [Member] ¥ in Millions	Mar. 31, 2020JPY (¥)
Lease receivables: Direct financing lease, maturities in
2021	¥ 567,342
2022	485,810
2023	382,135
2024	295,263
2025	207,067
2026 and thereafter	255,743
Total undiscounted cash flows	2,193,360
Difference between undiscounted cash flows and the lease receivables recognized on balance sheet	(319,129)
Amount on balance sheet	¥ 1,874,231

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Detail) - JPY (¥) ¥ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Income Taxes (Narrative) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Line Items]
Federal corporate income tax rate		35.00%
Approximate effective statutory rate of corporate income tax			30.60%	30.60%	30.60%
Operating loss carryforwards			¥ 228,637
Tax credit carryforwards			72,360
Maximum [Member]
Income Taxes [Line Items]
Reasonably possible decrease in unrecognized tax benefits			¥ 2,400
Tax Cuts & Jobs Act [Member]
Income Taxes [Line Items]
Federal corporate income tax rate	21.00%
Change in income tax expense (benefit) resulting from change in tax laws					¥ (10,395)
Due to Commencement of Certain Subsidiary's Application of Consolidated Corporate-Tax System [Member]
Income Taxes [Line Items]
Addition (release) of valuation allowance					¥ (53,360)
Requirements of Japanese Tax Law for Domestic Company to Exclude from Taxable Income Dividend Received from Foreign Company [Member]
Income Taxes [Line Items]
Percentage of dividend that can be excluded from the taxable income			95.00%
Percentage of taxable dividends over the amount received from certain foreign subsidiaries			5.00%
Requirements of Japanese Tax Law for Domestic Company to Exclude from Taxable Income Dividend Received from Foreign Company [Member] \| Minimum [Member]
Income Taxes [Line Items]
Percentage of outstanding shares held in a foreign company who declared a dividend			25.00%
Continuous holding period on the date the dividend is declared by a foreign company			6 months

Income Taxes (Income before Inc

Income Taxes (Income before Income Tax Expense by Jurisdiction) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	¥ 433,220	¥ 870,842	¥ 1,661,819
Domestic Income [Member]
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	89,440	228,018	803,057
Foreign Income [Member]
Income Taxes [Line Items]
Income (loss) before income tax expense (benefit)	¥ 343,780	¥ 642,824	¥ 858,762

Income Taxes (Detail of Current

Income Taxes (Detail of Current and Deferred Income Tax Expense (Benefit)) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Current:
Domestic	¥ 28,128	¥ 57,303	¥ 180,109
Foreign	147,344	123,730	107,119
Total	175,472	181,033	287,228
Deferred:
Domestic	(18,949)	(32,746)	116,873
Foreign	(42,018)	(15,050)	3,722
Total	(60,967)	(47,796)	120,595
Income tax expense	114,505	133,237	407,823
Income tax expense (benefit) reported in Accumulated OCI relating to:
Investment securities	(29,747)	15,590	120,588
Debt valuation adjustments	23,908	4,293	(960)
Derivatives qualifying for cash flow hedges	4,012	(1,845)	(4,421)
Defined benefit plans	(57,685)	(38,229)	50,774
Foreign currency translation adjustments	(20,693)	15,148	(34,527)
Total	(80,205)	(5,043)	131,454
Total, Income tax expense (benefit)	¥ 34,300	¥ 128,194	¥ 539,277

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Effective Income Tax Rates) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020		Mar. 31, 2019	Mar. 31, 2018
Reconciliation of effective income tax rate:
Combined normal effective statutory tax rate	30.60%		30.60%	30.60%
Nondeductible expenses	1.20%		0.50%	0.20%
Impairment of goodwill	26.10%
Foreign tax credit and payments	(9.20%)		(3.30%)	(1.70%)
Lower tax rates applicable to income of subsidiaries	(3.20%)		(2.50%)	(0.40%)
Change in valuation allowance	7.90%		(1.40%)	(3.00%)
Realization of previously unrecognized tax effects of subsidiaries	(19.80%)	[1]
Nontaxable dividends received	(15.60%)		(9.10%)	(2.00%)
Undistributed earnings of subsidiaries	3.60%		0.60%	0.70%
Tax and interest expense for uncertainty in income taxes	0.00%		0.60%	0.00%
Noncontrolling interest income (loss)	(0.10%)		0.20%	0.10%
Effect of changes in tax laws			0.00%	(0.60%)
Expiration of loss carryforward	1.90%		0.10%	0.40%
Other—net	3.00%		(1.00%)	0.20%
Effective income tax rate	26.40%		15.30%	24.50%
Realization of tax benefits that were not previously recognized as deferred tax assets	¥ 85,588

[1]	In October 2019, a wholly owned subsidiary of the MUFG Group was sold. The sale resulted in the realization of tax benefits that were not previously recognized as deferred tax assets, resulting in a ¥85,588 million reduction of income tax expense and a 19.8% reduction in the effective tax rate for the fiscal year ended March 31, 2020.

Income Taxes (Components of Net

Income Taxes (Components of Net Deferred Tax Assets) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Deferred tax assets:
Allowance for credit losses		¥ 317,770	¥ 301,222
Operating loss carryforwards		94,326	177,143
Loans		2,022	691
Accrued liabilities and other		277,807	236,363
Premises and equipment, including sale-and-leaseback transactions		150,116	158,144
Derivative financial instruments		96,761	101,118
Defined benefit plans		57,836	5,238
Obligations under operating leases		133,812
Valuation allowance		(151,530)	(218,191)
Total deferred tax assets		978,920	761,728
Deferred tax liabilities:
Investment securities (including trading account assets at fair value under the fair value option)		788,614	911,483
Intangible assets		87,063	38,772
Lease transactions		54,349	65,115
Investments in subsidiaries and affiliates	[1]	279,583	217,429
Right-of-use assets of operating leases		106,995
Other	[1]	90,653	63,272
Total deferred tax liabilities		1,407,257	1,296,071
Net deferred tax assets (liabilities)		¥ (428,337)	¥ (534,343)

[1]	Certain reclassifications have been made to prior period to conform to the current presentation.

Income Taxes (Operating Loss an

Income Taxes (Operating Loss and Tax Credit Carryforwards) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	¥ 228,637
Tax credit carryforwards	72,360
Fiscal Year Ending March 31, 2021 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	11,024
Tax credit carryforwards	12,534
Fiscal Year Ending March 31, 2022 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	16,306
Tax credit carryforwards	6,137
Fiscal Year Ending March 31, 2023 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	5,867
Tax credit carryforwards	219
Fiscal Year Ending March 31, 2024 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	5,524
Tax credit carryforwards	185
Fiscal Year Ending March 31, 2025 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	81,967
Tax credit carryforwards	168
Fiscal Year Ending March 31, 2026 [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	51,271
Tax credit carryforwards	130
Fiscal Year Ending March 31, 2027 and Thereafter [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	25,770
Tax credit carryforwards	47,943
No Definite Expiration Date [Member]
Operating Loss and Tax Credit Carryforwards [Line Items]
Operating loss carryforwards	30,908
Tax credit carryforwards	¥ 5,044

Income Taxes (Roll-forward of U

Income Taxes (Roll-forward of Unrecognized Tax Benefits) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Roll-forward of unrecognized tax benefits:
Balance at beginning of fiscal year	¥ 19,160	¥ 12,917	¥ 7,851
Gross amount of increases for current year's tax positions	399	313	427
Gross amount of increases for prior years' tax positions	212	8,836	6,642
Gross amount of decreases for prior years' tax positions		(1,090)	(455)
Net amount of changes relating to settlements with tax authorities	(81)		(1,074)
Decreases due to lapse of applicable statutes of limitations	(297)	(1,540)	(253)
Foreign exchange translation and other	(144)	(276)	(221)
Balance at end of fiscal year	¥ 19,249	¥ 19,160	¥ 12,917

Income Taxes (Roll-forward of I

Income Taxes (Roll-forward of Interest and Penalties Recognized) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Balance at beginning of fiscal year	¥ 3,056	¥ 4,564	¥ 4,054
Total interest and penalties in the consolidated statements of income	(398)	(1,655)	694
Total cash settlements, foreign exchange translation and other	(46)	147	(184)
Balance at end of fiscal year	¥ 2,612	¥ 3,056	¥ 4,564

Income Taxes (Status of Years u

Income Taxes (Status of Years under Audit or Open to Examination by Major Tax Jurisdictions) (Detail)	12 Months Ended
	Mar. 31, 2020
Japan [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2019 and forward
United States—Federal [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2016 and forward
United States—California [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2015 and forward
Thailand [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2012 and forward
Indonesia [Member]
Income Tax Contingency [Line Items]
Status of tax years under audit or open to examination	2017 and forward

Pledged Assets and Collateral (

Pledged Assets and Collateral (Narrative) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Financial Instruments Pledged as Collateral [Abstract]
Investment securities pledged for acting as a collection agent of public funds	¥ 18,254,788
Reserve funds included in Cash and due from banks and Interest-earning deposits in other banks	2,606,464	¥ 2,568,340
Pledged assets that may not be sold or repledged by secured parties	36,223,000
Fair value of securities accepted as collateral that is permitted to be sold or repledged	38,858,000	22,927,000
Fair value of securities accepted as collateral that was sold or repledged	32,095,000	16,514,000
Cash collateral pledged for derivative transactions included in Other assets	1,696,108	1,276,897
Cash collateral received for derivative transactions included in Other liabilities	¥ 1,125,305	¥ 844,234

Pledged Assets and Collateral_3

Pledged Assets and Collateral (Assets Mortgaged, Pledged, or Otherwise Subject to Lien) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 37,750,681
Trading Account Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	10,264,854
Investment Securities [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	14,096,841
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	13,354,396
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 34,590

Pledged Assets and Collateral_4

Pledged Assets and Collateral (Pledged Assets Classified by Type of Liabilities) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 37,750,681
Deposits [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	134,704
Payables under Repurchase Agreements and Securities Lending Transactions [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	15,286,574
Other Short-term Borrowings and Long-term Debt [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	22,312,888
Other [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged assets	¥ 16,515

Deposits (Narrative) (Detail)

Deposits (Narrative) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)	Mar. 31, 2020USD ($)	Mar. 31, 2019JPY (¥)
Deposits [Line Items]
Time deposits, including certificates of deposits ("CDs"), issued in amount of JPY10 million or more, Domestic deposits	¥ 23,957,076		¥ 25,899,780
Foreign [Member]
Deposits [Line Items]
Time deposits, including certificates of deposits ("CDs"), issued in amount of U.S.$100,000 or more, Foreign deposits	23,329,855		¥ 23,858,381
Minimum [Member]
Deposits [Line Items]
Issue amount of domestic time deposits in Japanese Yen	¥ 10
U.S.$ equivalent of JPY10 million based on Federal Reserve Bank of New York's noon buying rate \| $		$ 93,000
Issue amount of foreign time deposits in U.S. dollars \| $		$ 100,000

Deposits (Time Deposits by Matu

Deposits (Time Deposits by Maturity) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Domestic [Member]
Maturities of time deposits:
Due in one year or less	¥ 31,655,230
Due after one year through two years	4,522,580
Due after two years through three years	2,430,995
Due after three years through four years	546,578
Due after four years through five years	654,135
Due after five years	799,180
Total	40,608,698
Foreign [Member]
Maturities of time deposits:
Due in one year or less	23,574,644
Due after one year through two years	722,461
Due after two years through three years	275,303
Due after three years through four years	112,962
Due after four years through five years	17,950
Due after five years	32,726
Total	¥ 24,736,046

Call Money and Funds Purchase_3

Call Money and Funds Purchased (Summary of Funds Transactions) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Amount	¥ 3,668,922	¥ 2,450,320
Outstanding at end of fiscal year, Weighted average interest rate	0.04%	0.12%
Minimum [Member]
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Principal range of maturities	1 day	1 day
Maximum [Member]
Call Money and Funds Purchased Transactions [Line Items]
Outstanding at end of fiscal year, Principal range of maturities	30 days	30 days

Due to Trust Account, Short-t_3

Due to Trust Account, Short-term Borrowings and Long-term Debt (Narrative) (Detail) € in Millions, ¥ in Millions, $ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2020JPY (¥)	Mar. 31, 2020USD ($)	Mar. 31, 2020EUR (€)	Mar. 31, 2020AUD ($)	Mar. 31, 2020HKD ($)	Mar. 31, 2019JPY (¥)
Debt Instrument [Line Items]
Unused lines of credit for financing	¥ 7,519,582					¥ 5,525,069
Basel III [Member]
Debt Instrument [Line Items]
Floor of Common Equity Tier 1 ratio, which leads the Group's discretion over unsecured perpetual subordinated Additional Tier 1 notes	5.125%
Minimum TLAC ratio, required by January 1, 2019, over risk weighted assets	16.00%
Minimum TLAC ratio, required by January 1, 2019, over leverage ratio denominator	6.00%
Minimum TLAC ratio, required by January 1, 2022, over risk weighted assets	18.00%
Minimum TLAC ratio, required by January 1, 2022, over leverage ratio denominator	6.75%
Basel III [Member] \| Unsecured Perpetual Subordinated Additional Tier 1 Notes [Member]
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	¥ 273,000
Basel III [Member] \| Bonds for TLAC [Member] \| U.S. Dollars
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	1,125,302	$ 10,340
Basel III [Member] \| Bonds for TLAC [Member] \| Euro
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	119,550		€ 1,000
Basel III [Member] \| Bonds for TLAC [Member] \| H.K. Dollars
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	3,257				$ 232
Basel III [Member] \| Bonds for TLAC [Member] \| Australian Dollars
Debt Instrument [Line Items]
Aggregated principal amount of long term debt issued	¥ 33,045			$ 500

Due to Trust Account, Short-t_4

Due to Trust Account, Short-term Borrowings and Long-term Debt (Summary of Due to Trust Account Transactions) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Amount outstanding at end of fiscal year	¥ 3,377,747	¥ 2,735,952
Weighted average interest rate on outstanding balance at end of fiscal year	0.00%	0.00%

Due to Trust Account, Short-t_5

Due to Trust Account, Short-term Borrowings and Long-term Debt (Components of Other Short-term Borrowings) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Short-term Debt [Line Items]
Other short-term borrowings	¥ 16,056,193	¥ 6,732,118
Less unamortized discount	711	1,045
Other short-term borrowings—net	¥ 16,055,482	¥ 6,731,073
Weighted average interest rate on outstanding balance at end of fiscal year	0.67%	1.97%
Domestic [Member]
Short-term Debt [Line Items]
Other short-term borrowings	¥ 11,323,055	¥ 1,624,286
Domestic [Member] \| Commercial Paper [Member]
Short-term Debt [Line Items]
Other short-term borrowings	1,160,758	1,033,568
Domestic [Member] \| Borrowings from Bank of Japan [Member]
Short-term Debt [Line Items]
Other short-term borrowings	9,800,800	241,070
Domestic [Member] \| Borrowings from Other Financial Institutions [Member]
Short-term Debt [Line Items]
Other short-term borrowings	191,453	227,482
Domestic [Member] \| Other [Member]
Short-term Debt [Line Items]
Other short-term borrowings	170,044	122,166
Foreign [Member]
Short-term Debt [Line Items]
Other short-term borrowings	4,733,138	5,107,832
Other short-term borrowings—net	4,733,138	5,107,832
Foreign [Member] \| Commercial Paper [Member]
Short-term Debt [Line Items]
Other short-term borrowings	3,836,459	3,929,636
Foreign [Member] \| Borrowings from Other Financial Institutions [Member]
Short-term Debt [Line Items]
Other short-term borrowings	631,502	967,901
Foreign [Member] \| Short-term Debentures [Member]
Short-term Debt [Line Items]
Other short-term borrowings	24,009	68,492
Foreign [Member] \| Other [Member]
Short-term Debt [Line Items]
Other short-term borrowings	¥ 241,168	¥ 141,803

Due to Trust Account, Short-t_6

Due to Trust Account, Short-term Borrowings and Long-term Debt (Components of Long-term Debt) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Debt Instrument [Line Items]
Obligations under finance leases		¥ 25,186
Total, before debt issuance costs		27,942,621	¥ 28,005,896
Debt issuance cost		(15,858)	(15,353)
Total, after debt issuance costs		27,926,763	27,990,543
MUFG [Member]
Debt Instrument [Line Items]
Obligations under finance leases		6,552	1,725
Total, before debt issuance costs		8,799,849	7,465,851
MUFG [Member] \| Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		5,104,562	4,080,187
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 3,864,822	2,949,022
Payable, currency		US dollars
Maturity date range, Start		2021
Maturity date range, End		2039
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.19%
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.29%
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 408,825	301,124
Payable, currency		Euro
Maturity date range, Start		2021
Maturity date range, End		2033
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.34%
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.75%
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 28,382	21,257
Payable, currency		other currencies
Maturity date range, Start		2024
Maturity date range, End		2029
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.08%
MUFG [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.05%
MUFG [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 734,254	765,188
Payable, currency		US dollars
Maturity date range, Start		2021
Maturity date range, End		2023
MUFG [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.70%
MUFG [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.46%
MUFG [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 41,843	43,596
Payable, currency		Euro
Maturity date		2023
Interest rate, stated percentage		0.13%
MUFG [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 26,436
Payable, currency		other currencies
Maturity date		2024
Interest rate, stated percentage		2.17%
MUFG [Member] \| Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 3,688,735	3,383,939
MUFG [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 685,663	618,925
Payable, currency		Japanese yen
Maturity date range, Start		2024
Maturity date range, End		2030
MUFG [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.37%
MUFG [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.39%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,043,336	890,359
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2030
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.29%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.63%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,756,087	1,706,695
Payable, currency		Japanese yen
Maturity date		no stated maturity
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.82%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Bonds II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.52%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 47,500	32,500
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2029
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.30%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.50%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 66,649	45,960
Payable, currency		Japanese yen
Maturity date		no stated maturity
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.85%
MUFG [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.17%
MUFG [Member] \| Subordinated Debt [Member] \| Floating Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 3,500	3,500
Payable, currency		Japanese yen
Maturity date		no stated maturity
Interest rate, stated percentage		3.02%
MUFG [Member] \| Subordinated Debt [Member] \| Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 86,000	86,000
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2028
MUFG [Member] \| Subordinated Debt [Member] \| Floating Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.57%
MUFG [Member] \| Subordinated Debt [Member] \| Floating Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.79%
BK [Member]
Debt Instrument [Line Items]
Obligations under finance leases		¥ 5,636	7,704
Total, before debt issuance costs		14,221,218	15,141,912
BK [Member] \| Obligations under Sale-and-leaseback Transactions [Member]
Debt Instrument [Line Items]
Long-term debt			40,732
BK [Member] \| Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		12,819,953	13,477,619
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 141,700	234,500
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2027
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.36%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.57%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,104,504	1,284,812
Payable, currency		US dollars
Maturity date range, Start		2020
Maturity date range, End		2050
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		4.70%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 108,252	112,687
Payable, currency		Euro
Maturity date range, Start		2022
Maturity date range, End		2037
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.88%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds III [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.06%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds IV [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 17,620	19,084
Payable, currency		other currencies
Maturity date range, Start		2021
Maturity date range, End		2047
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds IV [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Bonds IV [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		5.30%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 10,440,217	10,786,372
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2028
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.25%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 8,367
Payable, currency		US dollars
Maturity date		2030
Interest rate, stated percentage		2.93%
BK [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]		¥ 9,483
Payable, currency			other currencies
Maturity date			2030
Interest rate, stated percentage			2.93%
BK [Member] \| Unsubordinated Debt [Member] \| Adjustable Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]		¥ 1,110
Payable, currency			US dollars
Maturity date			2030
Interest rate, stated percentage			3.00%
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 897,170	¥ 1,008,949
Payable, currency		US dollars
Maturity date range, Start		2020
Maturity date range, End		2031
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.79%
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.38%
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 102,123	15,382
Payable, currency		Euro
Maturity date range, Start		2021
Maturity date range, End		2030
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.20%
BK [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]		¥ 5,240
Payable, currency			other currencies
Maturity date			2028
Interest rate, stated percentage			3.23%
BK [Member] \| Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		604,490	¥ 976,820
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 490,590	513,420
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2031
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.31%
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.91%
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 73,400	73,400
Payable, currency		Japanese yen
Maturity date range, Start		2022
Maturity date range, End		2035
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.26%
BK [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.24%
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 12,000	20,000
Payable, currency		Japanese yen
Maturity date range, Start		2025
Maturity date range, End		2028
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.38%
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.04%
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 13,500	355,000
Payable, currency		Japanese yen
Maturity date		no stated maturity
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.67%
BK [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.52%
BK [Member] \| Subordinated Debt [Member] \| Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 15,000	15,000
Maturity date		2027
Interest rate, stated percentage		0.14%
BK [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 791,139	639,037
Maturity date range, Start		2020
Maturity date range, End		2080
BK [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.12%
BK [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		6.14%
Other Subsidiaries [Member]
Debt Instrument [Line Items]
Obligations under finance leases		¥ 12,998	13,107
Total, before debt issuance costs		4,921,554	5,398,133
Other Subsidiaries [Member] \| Unsubordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		4,443,761	4,910,200
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 940,691	1,291,537
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2050
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		20.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,106,465	1,385,936
Payable, currency		US dollars
Maturity date range, Start		2020
Maturity date range, End		2037
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		26.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes III [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 2,965	2,479
Payable, currency		Euro
Maturity date range, Start		2020
Maturity date range, End		2026
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes III [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes III [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.61%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes IV [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 387,799	334,586
Payable, currency		Thai baht
Maturity date range, Start		2020
Maturity date range, End		2026
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes IV [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes IV [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.15%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes V [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 360,558	219,781
Payable, currency		other currencies
Maturity date range, Start		2020
Maturity date range, End		2037
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes V [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes V [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		15.33%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 1,259,427	1,425,387
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2050
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.70%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 6,804	6,241
Payable, currency		other currencies
Maturity date range, Start		2020
Maturity date range, End		2024
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating/Adjustable Rate Borrowings, Bonds and Notes II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.30%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 378,217	244,253
Payable, currency		US dollars
Maturity date range, Start		2020
Maturity date range, End		2028
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings, Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating Rate Borrowings, Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		16.00%
Other Subsidiaries [Member] \| Unsubordinated Debt [Member] \| Floating Rate Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 835
Payable, currency		Euro
Maturity date range, Start		2020
Maturity date range, End		2022
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 458,342	472,013
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Floating Rate Borrowings I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 2,000	41,000
Payable, currency		Japanese yen
Maturity date		2021
Interest rate, stated percentage		0.73%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 223,095	269,373
Payable, currency		Japanese yen
Maturity date range, Start		2020
Maturity date range, End		2030
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		1.14%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Borrowings, Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.61%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 737	1,409
Payable, currency		US dollars
Maturity date range, Start		2022
Maturity date range, End		2027
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		7.50%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		9.90%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes II [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 220,756	143,212
Payable, currency		Thai baht
Maturity date range, Start		2020
Maturity date range, End		2029
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes II [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.40%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes II [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.90%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Fixed Rate Bonds and Notes III [Member]
Debt Instrument [Line Items]
Long-term debt	[1],[2]	¥ 7,179	7,347
Payable, currency		other currencies
Maturity date		2021
Interest rate, stated percentage		0.00%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Adjustable Rate Borrowings, Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]		¥ 4,500
Payable, currency			Japanese yen
Maturity date			no stated maturity
Interest rate, stated percentage			2.83%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Floating Rate Bonds and Notes I [Member]
Debt Instrument [Line Items]
Long-term debt	[1]	¥ 4,575	¥ 5,172
Payable, currency		US dollars
Maturity date range, Start		2020
Maturity date range, End		2036
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Floating Rate Bonds and Notes I [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		3.59%
Other Subsidiaries [Member] \| Subordinated Debt [Member] \| Floating Rate Bonds and Notes I [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		10.92%
Other Subsidiaries [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member]
Debt Instrument [Line Items]
Long-term debt		¥ 6,453	¥ 2,813
Maturity date range, Start		2021
Maturity date range, End		2024
Other Subsidiaries [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		0.25%
Other Subsidiaries [Member] \| Obligations under Loan Securitization Transaction Accounted for as Secured Borrowings [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate, stated percentage		2.25%

[1]	Adjustable rate debts are debts where interest rates are reset in accordance with the terms of the debt agreements, and floating rate debts are debts where interest rates are repriced in accordance with movements of markets indices.
[2]	Minor currencies, such as Australian dollar, British pound, Indonesian rupiah, Brazilian real, Russian ruble etc excluding Japanese yen, US dollars, Euro, Thai bahts have been summarized into the “Other currencies” classification.

Due to Trust Account, Short-t_7

Due to Trust Account, Short-term Borrowings and Long-term Debt (Summary of Subsequent Maturities of Long-term Debt) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Long-term debt by maturity:
2021	¥ 10,124,501
2022	3,863,280
2023	2,573,524
2024	2,214,595
2025	1,279,648
2026 and thereafter	7,887,073
Total	27,942,621	¥ 28,005,896
MUFG [Member]
Long-term debt by maturity:
2021	303,428
2022	778,600
2023	876,475
2024	731,255
2025	719,364
2026 and thereafter	5,390,727
Total	8,799,849	7,465,851
BK [Member]
Long-term debt by maturity:
2021	8,550,560
2022	2,165,072
2023	637,647
2024	1,072,061
2025	292,304
2026 and thereafter	1,503,574
Total	14,221,218	15,141,912
Other Subsidiaries [Member]
Long-term debt by maturity:
2021	1,270,513
2022	919,608
2023	1,059,402
2024	411,279
2025	267,980
2026 and thereafter	992,772
Total	¥ 4,921,554	¥ 5,398,133

Severance Indemnities and Pen_3

Severance Indemnities and Pension Plans (Narrative) (Detail) ¥ in Millions	12 Months Ended
	Mar. 31, 2020JPY (¥)Age	Mar. 31, 2019JPY (¥)	Mar. 31, 2018JPY (¥)
Defined Benefit Plan Disclosure [Line Items]
Eligible age for lifetime annuity payments \| Age	65
Special lump-sum early termination benefits charged to operations for the fiscal year	¥ 13,883	¥ 9,325	¥ 10,153
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Other Debt Securities and Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of debt securities issued by the MUFG Group included in plan assets	¥ 942	¥ 1,224
Percentage of fair value of debt securities issued by the MUFG Group to total fair value of plan assets	0.03%	0.04%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of common stock issued by the MUFG Group included in plan assets	¥ 5,843	¥ 5,414
Percentage of fair value of common stock issued by the MUFG Group to total fair value of plan assets	0.20%	0.18%

Severance Indemnities and Pen_4

Severance Indemnities and Pension Plans (Components of Net Periodic Cost of Pension Benefits and Other Benefits) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (income)	¥ (6,917)	¥ (19,839)	¥ (7,955)
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the fiscal year	49,194	48,352	47,064
Interest cost on projected benefit obligation	10,969	13,504	14,383
Expected return on plan assets	(74,744)	(74,270)	(68,432)
Amortization of net actuarial loss	5,641	731	7,309
Amortization of prior service cost	(1,204)	(1,210)	(1,094)
Loss (gain) on settlements and curtailment	(2,366)	(5,980)	(4,394)
Net periodic benefit cost (income)	(12,510)	(18,873)	(5,164)
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the fiscal year	14,406	12,395	10,169
Interest cost on projected benefit obligation	17,370	14,958	15,359
Expected return on plan assets	(31,382)	(33,266)	(32,110)
Amortization of net actuarial loss	8,685	9,993	8,847
Amortization of prior service cost	(2,633)	(3,039)	(3,090)
Loss (gain) on settlements and curtailment	223	49	52
Net periodic benefit cost (income)	6,669	1,090	(773)
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefits earned during the fiscal year	366	525	676
Interest cost on projected benefit obligation	1,159	1,046	1,079
Expected return on plan assets	(1,882)	(2,314)	(2,122)
Amortization of net actuarial loss	1,162	707	1,124
Amortization of prior service cost	(1,881)	(2,020)	(2,775)
Net periodic benefit cost (income)	¥ (1,076)	¥ (2,056)	¥ (2,018)

Severance Indemnities and Pen_5

Severance Indemnities and Pension Plans (Summary of Assumptions Used in Computation) (Detail)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	0.61%	0.76%	0.82%
Weighted-average assumptions used, Discount rates in determining benefit obligation	0.63%	0.61%	0.76%
Weighted-average assumptions used, Rates of increase in future compensation level for determining expense	3.21%	3.21%	3.23%
Weighted-average assumptions used, Rates of increase in future compensation level for determining benefit obligation	3.46%	3.21%	3.21%
Weighted-average assumptions used, Expected rates of return on plan assets	2.89%	2.83%	2.87%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	3.80%	3.19%	3.52%
Weighted-average assumptions used, Discount rates in determining benefit obligation	3.05%	3.87%	3.38%
Weighted-average assumptions used, Rates of increase in future compensation level for determining expense	5.01%	4.65%	4.65%
Weighted-average assumptions used, Rates of increase in future compensation level for determining benefit obligation	5.12%	5.01%	4.65%
Weighted-average assumptions used, Expected rates of return on plan assets	6.25%	6.70%	6.71%
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted-average assumptions used, Discount rates in determining expense	3.87%	3.27%	3.61%
Weighted-average assumptions used, Discount rates in determining benefit obligation	2.96%	3.99%	3.43%
Weighted-average assumptions used, Expected rates of return on plan assets	7.00%	7.50%	7.50%

Severance Indemnities and Pen_6

Severance Indemnities and Pension Plans (Assumed Health Care Cost Trend Rates and Effect of a One-percentage-point Change for Foreign Offices and Subsidiaries) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
MUAH [Member]
Defined benefit plan, assumed health care cost trend rates for the next fiscal year:
Initial trend rate	[1]	4.14%	4.44%
Ultimate trend rate	[1]	3.77%	3.94%
Year the rate reaches the ultimate trend rate	[1]	2027	2027
Defined benefit plan, effect of one-percentage-point change in assumed health care cost trend rates:
Effect of one-percentage-point increase on total of service and interest cost components		¥ 152
Effect of one-percentage-point decrease on total of service and interest cost components		(128)
Effect of one-percentage-point increase on postretirement benefit obligation		2,823
Effect of one-percentage-point decrease on postretirement benefit obligation		¥ (2,394)
Other than MUAH [Member]
Defined benefit plan, assumed health care cost trend rates for the next fiscal year:
Initial trend rate	[1]	6.50%	7.00%
Ultimate trend rate	[1]	4.50%	4.50%
Year the rate reaches the ultimate trend rate	[1]	2027	2027
Defined benefit plan, effect of one-percentage-point change in assumed health care cost trend rates:
Effect of one-percentage-point increase on total of service and interest cost components		¥ 42
Effect of one-percentage-point decrease on total of service and interest cost components		(33)
Effect of one-percentage-point increase on postretirement benefit obligation		838
Effect of one-percentage-point decrease on postretirement benefit obligation		¥ (665)

[1]	Fiscal years of MUFG Americas Holdings and foreign subsidiaries end on December 31. Therefore, the above tables present the rates and amounts at December 31, 2018 and 2019, respectively.

Severance Indemnities and Pen_7

Severance Indemnities and Pension Plans (Combined Funded Status and Amounts Recognized in Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	¥ 729,199	¥ 839,757
Accrued benefit cost	(92,225)	(65,690)
Domestic, Japan [Member] \| Non-contributory Pension Benefits and SIP [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	1,841,884	1,821,794
Service cost	49,194	48,352
Interest cost	10,969	13,504
Acquisitions / Divestitures	(94)	(160)
Actuarial loss (gain)	(3,053)	43,527
Benefits paid	(66,771)	(66,539)
Lump-sum payment	(24,224)	(18,594)
Benefit obligation at end of fiscal year	1,807,905	1,841,884	¥ 1,821,794
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	2,594,788	2,603,329
Actual return on plan assets	(123,802)	13,664
Employer contributions	28,653	44,427
Acquisitions / Divestitures	(21)	(93)
Benefits paid	(66,771)	(66,539)
Fair value of plan assets at end of fiscal year	2,432,847	2,594,788	2,603,329
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	643,520	770,564
Accrued benefit cost	(18,577)	(17,660)
Net amount recognized	624,943	752,904
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	469,080	502,056
Service cost	14,406	12,395	10,169
Interest cost	17,370	14,958	15,359
Plan participants' contributions	28	37
Acquisitions / Divestitures	13,000	(17)
Amendments	3,721	64
Actuarial loss (gain)	58,831	(28,466)
Benefits paid	(21,120)	(19,894)
Lump-sum payment	(2,284)	(1,750)
Translation adjustments and other	(6,019)	(10,303)
Benefit obligation at end of fiscal year	547,013	469,080	502,056
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	493,495	542,646
Actual return on plan assets	92,087	(21,353)
Employer contributions	2,887	3,117
Acquisitions / Divestitures	791
Plan participants' contributions	28	37
Benefits paid	(21,120)	(19,894)
Translation adjustments and other	(8,660)	(11,058)
Fair value of plan assets at end of fiscal year	559,508	493,495	542,646
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	81,301	67,821
Accrued benefit cost	(68,806)	(43,406)
Net amount recognized	12,495	24,415
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of fiscal year	31,510	34,347
Service cost	366	525	676
Interest cost	1,159	1,046	1,079
Plan participants' contributions	455	452
Actuarial loss (gain)	1,648	(2,354)
Benefits paid	(2,326)	(2,221)
Translation adjustments and other	(429)	(285)
Benefit obligation at end of fiscal year	32,383	31,510	34,347
Change in plan assets:
Fair value of plan assets at beginning of fiscal year	28,258	32,466
Actual return on plan assets	5,695	(1,948)
Employer contributions	186	102
Plan participants' contributions	455	452
Benefits paid	(2,326)	(2,221)
Translation adjustments and other	(349)	(593)
Fair value of plan assets at end of fiscal year	31,919	28,258	¥ 32,466
Amounts recognized in the consolidated balance sheets:
Prepaid benefit cost	4,378	1,372
Accrued benefit cost	(4,842)	(4,624)
Net amount recognized	¥ (464)	¥ (3,252)

Severance Indemnities and Pen_8

Severance Indemnities and Pension Plans (Aggregated Accumulated Benefit Obligations) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregated accumulated benefit obligations	¥ 1,773,042	¥ 1,800,992
Foreign Offices and Subsidiaries [Member] \| Pension Benefits and Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Aggregated accumulated benefit obligations	¥ 523,078	¥ 457,048

Severance Indemnities and Pen_9

Severance Indemnities and Pension Plans (Summary for Plans with Accumulated Benefit Obligations in Excess of Plan Assets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined benefit plan, pension plans with accumulated benefit obligations in excess of plan assets:
Projected benefit obligations	¥ 26,442	¥ 23,108
Accumulated benefit obligations	26,442	23,108
Fair value of plan assets	7,980	5,629
Foreign Offices and Subsidiaries [Member] \| Pension Benefits and Other Benefits [Member]
Defined benefit plan, pension plans with accumulated benefit obligations in excess of plan assets:
Projected benefit obligations	89,829	63,273
Accumulated benefit obligations	67,609	52,249
Fair value of plan assets	¥ 21,014	¥ 19,866

Severance Indemnities and Pe_10

Severance Indemnities and Pension Plans (Amounts Recognized in Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net amount recognized in Accumulated OCI	¥ 337,918	¥ 208,273	¥ 119,593	¥ 214,062
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	437,254	245,037
Prior service cost	(4,255)	(5,459)
Gross amount recognized in Accumulated OCI	432,999	239,578
Taxes	(174,915)	(115,816)
Net amount recognized in Accumulated OCI	258,084	123,762
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	114,167	126,238
Prior service cost	(7,875)	(14,536)
Gross amount recognized in Accumulated OCI	106,292	111,702
Taxes	(27,974)	(29,875)
Net amount recognized in Accumulated OCI	78,318	81,827
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	5,164	8,628
Prior service cost	(2,304)	(4,263)
Gross amount recognized in Accumulated OCI	2,860	4,365
Taxes	(874)	(1,282)
Net amount recognized in Accumulated OCI	¥ 1,986	¥ 3,083

Severance Indemnities and Pe_11

Severance Indemnities and Pension Plans (Amounts Recognized in OCI) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Losses (gains) due to amortization:
Total changes in Accumulated OCI	¥ 189,208	¥ 127,169	¥ (160,612)
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	195,492	104,132
Losses (gains) due to amortization:
Net actuarial loss	(5,641)	(731)
Prior service cost	1,204	1,210
Curtailment and settlement	2,366	5,980
Total changes in Accumulated OCI	193,421	110,591
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	(1,732)	26,155
Prior service cost arising during the year	3,722	65
Losses (gains) due to amortization:
Net actuarial loss	(8,685)	(9,993)
Prior service cost	2,633	3,039
Curtailment and settlement	(223)	(49)
Foreign currency translation adjustments	(1,125)	(1,399)
Total changes in Accumulated OCI	(5,410)	17,818
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain) arising during the year	(2,166)	1,908
Losses (gains) due to amortization:
Net actuarial loss	(1,162)	(707)
Prior service cost	1,881	2,020
Foreign currency translation adjustments	(58)	(68)
Total changes in Accumulated OCI	¥ (1,505)	¥ 3,153

Severance Indemnities and Pe_12

Severance Indemnities and Pension Plans (Weighted-average Target Asset Allocation of Plan Assets for Pension Benefits and Other Benefits) (Detail)	Mar. 31, 2020
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	35.90%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	33.60%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	15.00%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	10.40%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	1.40%
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Short-term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	3.70%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	0.40%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	49.20%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	38.30%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	10.40%
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Short-term Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	1.70%
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	100.00%
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member] \| Non-Japanese Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	70.00%
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member] \| Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocation of plan assets	30.00%

Severance Indemnities and Pe_13

Severance Indemnities and Pension Plans (Estimated Future Benefit Payments) (Detail) ¥ in Millions	Mar. 31, 2020JPY (¥)
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2021	¥ 83,009
For the fiscal year ending March 31, 2022	82,073
For the fiscal year ending March 31, 2023	82,115
For the fiscal year ending March 31, 2024	81,988
For the fiscal year ending March 31, 2025	81,902
Thereafter (for the fiscal years ending March 31, 2026-2030)	397,860
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2021	21,368
For the fiscal year ending March 31, 2022	22,901
For the fiscal year ending March 31, 2023	23,747
For the fiscal year ending March 31, 2024	24,893
For the fiscal year ending March 31, 2025	25,614
Thereafter (for the fiscal years ending March 31, 2026-2030)	165,065
Foreign Offices and Subsidiaries [Member] \| Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
For the fiscal year ending March 31, 2021	2,023
For the fiscal year ending March 31, 2022	2,075
For the fiscal year ending March 31, 2023	2,111
For the fiscal year ending March 31, 2024	2,125
For the fiscal year ending March 31, 2025	2,089
Thereafter (for the fiscal years ending March 31, 2026-2030)	¥ 9,040

Severance Indemnities and Pe_14

Severance Indemnities and Pension Plans (Fair Value of Each Major Category of Plan Assets for Pension Benefits and SIP Investments: Domestic Subsidiaries) (Detail) - Domestic, Japan [Member] - Pension Benefits and SIPs [Member] - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 1,162,604	¥ 1,322,670
Approximate guaranteed rate of return of "Japanese general accounts of life insurance companies"		1.24%	1.24%
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 899,883	¥ 1,075,966
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		262,396	245,674
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		325	1,030
Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		147,926	146,060
Japanese Government Bonds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		147,926	146,060
Non-Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			9,226
Non-Japanese Government Bonds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			8,570
Non-Japanese Government Bonds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			656
Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		19,452	4,837
Other Debt Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		7,014	109
Other Debt Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		12,113	3,698
Other Debt Securities [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		325	1,030
Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		690,741	855,353
Japanese Marketable Equity Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		690,741	855,353
Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		47,890	65,191
Non-Japanese Marketable Equity Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		47,655	64,957
Non-Japanese Marketable Equity Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		235	234
Japanese General Account of Life Insurance Companies [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	217,898	222,460
Japanese General Account of Life Insurance Companies [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	217,898	222,460
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		38,697	19,543
Other Investments [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		6,547	917
Other Investments [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 32,150	¥ 18,626

[1]	“Japanese general accounts of life insurance companies” is a contract with life insurance companies that guarantees a return of approximately 1.24% from April 1, 2018 to March 31, 2019 and 1.24% from April 1, 2019 to March 31, 2020.

Severance Indemnities and Pe_15

Severance Indemnities and Pension Plans (Fair Value of Each Major Category of Plan Assets for Pension Benefits and SIP Investments: Foreign Offices and Subsidiaries) (Detail) - Foreign Offices and Subsidiaries [Member] - Pension Benefits [Member] - JPY (¥) ¥ in Millions		Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 414,604		¥ 251,936
Codification Improvements [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		136,316		112,000
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		151,399		132,560
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		262,955		119,188
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		250		188
Non-Japanese Government Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		47,320		43,302
Non-Japanese Government Bonds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		42,135		38,687
Non-Japanese Government Bonds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		5,185		4,615
Other Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		105,096		100,462
Other Debt Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		105,096		100,462
Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		27,597		21,221
Non-Japanese Marketable Equity Securities [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		26,981		20,569
Non-Japanese Marketable Equity Securities [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		616		652
Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	[1]	231,924		82,330
Other Investment Funds [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		81,803		73,286
Other Investment Funds [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		150,121		9,044
Other Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		2,667		4,621
Other Investments [Member] \| Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		480		18
Other Investments [Member] \| Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		1,937		4,415
Other Investments [Member] \| Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		¥ 250		¥ 188
MUAH [Member] \| Other Investment Funds [Member] \| Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			¥ 81,768		¥ 68,556
MUAH [Member] \| Other Investment Funds [Member] \| Common Collective Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets			¥ 119,307

[1]	Other investment funds of the foreign offices and subsidiaries include mutual funds and common collective funds of ¥68,556 million and nil, respectively, which were held by MUFG Americas Holdings at December 31, 2018 and ¥81,768 million and ¥119,307 million, respectively, at December 31, 2019. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.

Severance Indemnities and Pe_16

Severance Indemnities and Pension Plans (Fair Values of Investments Valued at Net Asset per Share (or Its Equivalent) for Pension Benefits and SIP Investments) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		¥ 1,270,243	¥ 1,272,118
Defined benefit plan, fair value of plan assets		1,162,604	1,322,670
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		755,517	747,035
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member] \| Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		125,218	109,915
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member] \| Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		212,727	184,121
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member] \| Non-Japanese Marketable Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		146,796	162,901
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member] \| Non-Japanese Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		169,978	155,792
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Japanese Pooled Funds [Member] \| Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		100,798	134,306
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)	[1]	514,726	525,083
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Other Investment Funds [Member] \| Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		486,496	500,850
Domestic, Japan [Member] \| Pension Benefits and SIPs [Member] \| Other Investment Funds [Member] \| Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		13,891	12,058
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		144,904	241,559
Defined benefit plan, fair value of plan assets		414,604	251,936
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Codification Improvements [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		136,316	112,000
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Other Investment Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)	[2]	144,904	241,559
Defined benefit plan, fair value of plan assets	[3]	231,924	82,330
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Other Investment Funds [Member] \| Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		56,125	53,775
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Other Investment Funds [Member] \| Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		54,474	46,818
Foreign Offices and Subsidiaries [Member] \| Pension Benefits [Member] \| Other Investment Funds [Member] \| Common Collective Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments valued at net asset per share (or its equivalent)		¥ 34,098	¥ 140,728

[1]	Other investment funds of the domestic subsidiaries include mutual funds and real estate funds of ¥500,850 million and ¥12,058 million, respectively, at March 31, 2019 and ¥486,496 million and ¥13,891 million, respectively, at March 31, 2020.
[2]	Other investment funds of the foreign offices and subsidiaries include mutual funds, real estate funds and common collective funds of ¥53,775 million, ¥46,818 million and ¥140,728 million, respectively, at March 31, 2019 and ¥56,125 million, ¥54,474 million and ¥34,098 million, respectively, at March 31, 2020. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.
[3]	Other investment funds of the foreign offices and subsidiaries include mutual funds and common collective funds of ¥68,556 million and nil, respectively, which were held by MUFG Americas Holdings at December 31, 2018 and ¥81,768 million and ¥119,307 million, respectively, at December 31, 2019. Based on guidance contained in Codification Improvements, issued by FASB in July 2018, some of common collective funds are reported within the fair value hierarchy as Level 2, which were previously included in the tables presenting fair values of certain investments valued at net asset value per share (or its equivalent) as a practical expedient. The amount of Pension benefits and SIP Investments impacted by the change in reporting was ¥136,316 million as of March 31, 2020. See Note 1 for more information.

Other Assets and Liabilities (N

Other Assets and Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 2,421,154	¥ 2,487,389
Marketable equity securities included in investment in equity method investees, aggregated market values	1,987,008	2,702,838
Investment in equity method investees, recognized impairment losses of other-than-temporary declines in the value of investments in certain affiliated companies	¥ 21,672	51,645	¥ 29,442
Morgan Stanley [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, Ownership percentage, approximately	23.93%
Marketable Equity Securities [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 1,809,161	1,936,468
Marketable Equity Securities [Member] \| Morgan Stanley [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	1,411,131	1,326,339
Marketable Equity Securities [Member] \| Morgan Stanley MUFG Securities, Co., Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity method investees	¥ 185,255	¥ 178,679

Other Assets and Liabilities (M

Other Assets and Liabilities (Major Components of Other Assets and Liabilities) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Other assets:
Accounts receivable: Receivables from brokers, dealers and customers for securities transactions		¥ 1,191,690	¥ 1,141,075
Accounts receivable: Other		1,212,511	1,394,794
Investments in equity method investees		2,421,154	2,487,389
Prepaid benefit cost (Note 13)		729,199	839,757
Cash collateral pledged for derivative transactions (Note 9)		1,696,108	1,276,897
Cash collateral for the use of Bank of Japan's settlement infrastructure		965,546	911,528
Accrued interest	[1]	308,448	359,648
Deferred tax assets (Note 8)	[1]	113,031	89,719
Right-of-use assets of operating leases (Note 7)		393,435
Other		4,077,577	2,990,462
Total		13,108,699	11,491,269
Other liabilities:
Accounts payable: Payables to brokers, dealers and customers for securities transactions		1,078,653	1,289,672
Accounts payable: Other		1,251,260	1,308,733
Obligations to return securities received as collateral (Notes 15, 16 and 31)	[1]	4,806,171	3,087,026
Accrued interest	[1]	187,096	214,735
Deferred tax liabilities (Note 8)		541,368	624,062
Allowance for off-balance sheet credit instruments		56,995	119,307
Accrued benefit cost (Note 13)		92,225	65,690
Guarantees and indemnifications		39,601	45,346
Cash collateral received for derivative transactions (Note 9)		1,125,305	844,234
Obligations under operating leases (Note 7)		482,813
Accrued and other liabilities		3,562,359	3,061,462
Total		¥ 13,223,846	¥ 10,660,267

[1]	Certain reclassifications have been made to prior period to confirm to the current presentation.

Other Assets and Liabilities (S

Other Assets and Liabilities (Summarized Financial Information of Morgan Stanley) (Detail) - Morgan Stanley [Member] - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Equity Method Investment, Summarized Financial Information, Assets
Trading assets	¥ 29,484	¥ 29,392
Securities purchased under agreements to resell	11,405	10,718
Securities borrowed	7,868	15,416
Total assets	103,149	97,223
Equity Method Investment, Summarized Financial Information, Liabilities and Equity
Deposits	25,601	19,948
Customer and other payables	21,556	21,431
Borrowings	21,206	21,165
Total liabilities	93,656	88,134
Noncontrolling interests	149	130
Equity Method Investment, Summarized Financial Information, Income and Loss
Net revenues	4,415	4,365	¥ 4,354
Total non-interest expenses	3,275	3,170	3,133
Income from continuing operations before income taxes	1,140	1,195	1,221
Net income applicable to Morgan Stanley	¥ 903	¥ 944	¥ 759

Other Assets and Liabilities _3

Other Assets and Liabilities (Summarized Financial Information of Equity Method Investees, Other than Morgan Stanley) (Detail) - Equity Method Investees Other than Morgan Stanley [Member] - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Equity Method Investment, Summarized Financial Information, Assets
Net loans	¥ 15,190	¥ 15,772
Total assets	29,255	28,910
Equity Method Investment, Summarized Financial Information, Liabilities and Equity
Deposits	8,898	9,103
Total liabilities	24,025	23,423
Noncontrolling interests	1,005	1,135
Equity Method Investment, Summarized Financial Information, Income and Loss
Total interest income	1,093	1,036	¥ 901
Total interest expense	419	430	329
Net interest income	674	606	572
Provision for credit losses	171	157	136
Income before income tax expense	366	205	337
Net income	¥ 285	¥ 135	¥ 229

Offsetting of Derivatives, Re_3

Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions (Summary of Offsetting of Derivatives, Repurchase Agreements, and Securities Lending Transactions) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Offsetting [Abstract]
Derivative assets, Gross amounts of recognized assets/liabilities		¥ 14,958,000	¥ 13,205,000
Derivative assets, Gross amounts offset in the consolidated balance sheet
Derivative assets, Net amounts presented in the consolidated balance sheet	[1],[2],[3]	14,958,000	13,205,000
Derivative assets, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(11,282,000)	(10,752,000)
Derivative assets, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(874,000)	(590,000)
Derivative assets, Net amounts		2,802,000	1,863,000
Receivables under resale agreements, Gross amounts of recognized assets/liabilities		25,884,000	13,885,000
Receivables under resale agreements, Gross amounts offset in the consolidated balance sheet		(1,888,000)	(2,910,000)
Receivables under resale agreements, Net amounts presented in the consolidated balance sheet		23,995,961	10,974,740
Receivables under resale agreements, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(23,195,000)	(9,793,000)
Receivables under resale agreements, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(21,000)	(20,000)
Receivables under resale agreements, Net amounts		780,000	1,162,000
Receivables under securities borrowing transactions, Gross amounts of recognized assets/liabilities		3,444,000	2,759,000
Receivables under securities borrowing transactions, Gross amounts offset in the consolidated balance sheet
Receivables under securities borrowing transactions, Net amounts presented in the consolidated balance sheet		3,443,959	2,758,573
Receivables under securities borrowing transactions, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(3,336,000)	(2,693,000)
Receivables under securities borrowing transactions, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged
Receivables under securities borrowing transactions, Net amounts		108,000	66,000
Financial assets, Gross amounts of recognized assets/liabilities, Total		44,286,000	29,849,000
Financial assets, Gross amounts offset in the consolidated balance sheet, Total		(1,888,000)	(2,910,000)
Financial assets, Net amounts presented in the consolidated balance sheet, Total		42,398,000	26,939,000
Financial assets, Gross amounts not offset in the consolidated balance sheet, Financial instruments, Total		(37,813,000)	(23,238,000)
Financial assets, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged, Total		(895,000)	(610,000)
Financial assets, Net amounts, Total		3,690,000	3,091,000
Derivative liabilities, Gross amounts of recognized assets/liabilities		14,034,000	12,710,000
Derivative liabilities, Gross amounts offset in the consolidated balance sheet
Derivative liabilities, Net amounts presented in the consolidated balance sheet	[1],[2],[3]	14,034,000	12,710,000
Derivative liabilities, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(11,296,000)	(10,671,000)
Derivative liabilities, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(1,140,000)	(933,000)
Derivative liabilities, Net amounts		1,598,000	1,106,000
Payables under repurchase agreements, Gross amounts of recognized assets/liabilities		33,733,000	28,125,000
Payables under repurchase agreements, Gross amounts offset in the consolidated balance sheet		(1,883,000)	(2,900,000)
Payables under repurchase agreements, Net amounts presented in the consolidated balance sheet		31,850,000	25,225,000
Payables under repurchase agreements, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(31,569,000)	(24,930,000)
Payables under repurchase agreements, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged		(34,000)	(15,000)
Payables under repurchase agreements, Net amounts		247,000	280,000
Payables under securities lending transactions, Gross amounts of recognized assets/liabilities		1,017,000	913,000
Payables under securities lending transactions, Gross amounts offset in the consolidated balance sheet
Payables under securities lending transactions, Net amounts presented in the consolidated balance sheet		1,016,874	913,087
Payables under securities lending transactions, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(986,000)	(880,000)
Payables under securities lending transactions, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged
Payables under securities lending transactions, Net amounts		31,000	33,000
Obligations to return securities received as collateral, Gross amounts of recognized assets/liabilities		4,806,000	3,087,000
Obligations to return securities received as collateral, Gross amounts offset in the consolidated balance sheet
Obligations to return securities received as collateral, Net amounts presented in the consolidated balance sheet	[4]	4,806,171	3,087,026
Obligations to return securities received as collateral, Gross amounts not offset in the consolidated balance sheet, Financial instruments		(1,966,000)	(1,244,000)
Obligations to return securities received as collateral, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged
Obligations to return securities received as collateral, Net amounts		2,840,000	1,843,000
Financial liabilities, Gross amounts of recognized assets/liabilities, Total		53,590,000	44,835,000
Financial liabilities, Gross amounts offset in the consolidated balance sheet, Total		(1,883,000)	(2,900,000)
Financial liabilities, Net amounts presented in the consolidated balance sheet, Total		51,707,000	41,935,000
Financial liabilities, Gross amounts not offset in the consolidated balance sheet, Financial instruments, Total		(45,817,000)	(37,725,000)
Financial liabilities, Gross amounts not offset in the consolidated balance sheet, Cash collateral received/pledged, Total		(1,174,000)	(948,000)
Financial liabilities, Net amounts, Total		¥ 4,716,000	¥ 3,262,000

[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.
[4]	Certain reclassifications have been made to prior period to confirm to the current presentation.

Repurchase Agreements, and Se_3

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings (Gross Obligations by Remaining Contractual Maturity and Class of Collateral Pledged) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2020	Mar. 31, 2019
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 33,733	¥ 28,125
Payables under securities lending transactions	1,017	913
Obligations to return securities received as collateral	4,806	3,087
Total	39,556	32,125
Overnight and Open [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	9,685	3,892
Payables under securities lending transactions	934	913
Obligations to return securities received as collateral	3,856	2,572
Total	14,475	7,377
30 Days or Less [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	16,608	18,586
Payables under securities lending transactions	64
Obligations to return securities received as collateral	599	396
Total	17,271	18,982
31-90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	4,496	2,824
Payables under securities lending transactions	19
Obligations to return securities received as collateral	276	117
Total	4,791	2,941
Over 90 Days [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	2,944	2,823
Obligations to return securities received as collateral	75	2
Total	¥ 3,019	¥ 2,825

Repurchase Agreements, and Se_4

Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings (Secured Borrowing by the Class of Collateral Pledged) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2020	Mar. 31, 2019
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	¥ 33,733	¥ 28,125
Payables under securities lending transactions	1,017	913
Obligations to return securities received as collateral	4,806	3,087
Total	39,556	32,125
Japanese National Government and Japanese Government Agency Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	10,687	8,306
Payables under securities lending transactions	38	21
Obligations to return securities received as collateral	2,241	856
Total	12,966	9,183
Foreign Government and Official Institution Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	17,326	14,291
Payables under securities lending transactions	57
Obligations to return securities received as collateral	873	1,286
Total	18,256	15,577
Corporate Bonds [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	784	705
Obligations to return securities received as collateral	183	172
Total	967	877
Residential Mortgage-backed Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	4,248	4,369
Obligations to return securities received as collateral	10
Total	4,258	4,369
Other Debt Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	157	238
Obligations to return securities received as collateral	2
Total	159	238
Marketable Equity Securities [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	506	200
Payables under securities lending transactions	914	892
Obligations to return securities received as collateral	1,497	772
Total	2,917	1,864
Others [Member]
Repurchase Agreements, and Securities Lending Transactions Accounted for as Secured Borrowings [Line Items]
Payables under repurchase agreements	25	16
Payables under securities lending transactions	8
Obligations to return securities received as collateral		1
Total	¥ 33	¥ 17

Preferred Stock (Narrative) (De

Preferred Stock (Narrative) (Detail) - ¥ / shares	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Class of Stock [Line Items]
Number of Preferred Stock outstanding
Class 5 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	400,000,000
Liquidation distribution per share	¥ 2,500
Class 6 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	200,000,000
Liquidation distribution per share	¥ 2,500
Class 7 Preferred Stock [Member]
Class of Stock [Line Items]
Stock authorized, shares	200,000,000
Liquidation distribution per share	¥ 2,500

Common Stock and Capital Surp_3

Common Stock and Capital Surplus (Narrative) (Detail) - JPY (¥) ¥ in Millions	Nov. 13, 2019	Nov. 13, 2018	May 15, 2018	Nov. 14, 2017	May 15, 2017	Dec. 23, 2019	Dec. 10, 2018	Jun. 04, 2018	Dec. 22, 2017	Jun. 21, 2017	Mar. 31, 2020
Common Stock [Member]
Treasury Stock:
Number of own shares repurchased						85,775,400	159,836,800	72,420,700	127,666,900	141,158,900
Approximate repurchase amount in aggregate of own shares based on the discretionary dealing contract						¥ 50,000	¥ 100,000	¥ 50,000	¥ 100,000	¥ 100,000
Approximate percentage of shares allowed for repurchase over total number of outstanding shares	0.77%	1.52%	0.76%	1.50%	1.49%
Date of own shares cancelled	Jan. 20, 2020	Jan. 22, 2019	Jul. 20, 2018	Jan. 22, 2018	Jul. 20, 2017
Common Stock [Member] \| Maximum [Member]
Treasury Stock:
Aggregated Number of shares allowed for repurchase	100,000,000	200,000,000	100,000,000	200,000,000	200,000,000
Aggregate amount of shares allowed for repurchase	¥ 50,000	¥ 100,000	¥ 50,000	¥ 100,000	¥ 100,000
Companies Act [Member] \| Minimum [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Percentage of proceeds per issuance of common stock, including conversions of bonds and notes, to be credited to the common stock account											50.00%
Percentage of outstanding common stock issued as free share distribution prior to April 1, 1991											5.00%
Companies Act [Member] \| Maximum [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Percentage of outstanding common stock issued as free share distribution prior to April 1, 1991											10.00%
BK and TB [Member] \| Companies Act [Member] \| Common Stock [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Increase (decrease) by amount equal to the fair value of the shares issued by the application of U.S. accounting practices for issuance of free shares distribution made prior to April 1, 1991											¥ 1,910,106
BK and TB [Member] \| Companies Act [Member] \| Unappropriated Retained Earnings [Member]
Common Stock and Capital Surplus Disclosure [Line Items]
Increase (decrease) by amount equal to the fair value of the shares issued by the application of U.S. accounting practices for issuance of free shares distribution made prior to April 1, 1991											¥ (1,910,106)

Common Stock and Capital Surp_4

Common Stock and Capital Surplus (Changes in Number of Issued Shares of Common Stock) (Detail) - Common Stock [Member] - shares	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Common Stock and Capital Surplus Disclosure [Line Items]
Balance at beginning of fiscal year	13,667,770,520	13,900,028,020	14,168,853,820
Retirement of shares of common stock	(85,775,400)	(232,257,500)	(268,825,800)
Balance at end of fiscal year	13,581,995,120	13,667,770,520	13,900,028,020

Retained Earnings, Legal Rese_2

Retained Earnings, Legal Reserve and Dividends (Narrative) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019	Oct. 01, 2005	Apr. 02, 2001
Retained Earnings Appropriated and Transferred [Line Items]
Common stock and preferred stock issued, Value	¥ 2,090,270	¥ 2,090,270
Legal capital surplus	¥ 5,533,520	¥ 5,577,186
Companies Act [Member] \| Minimum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash set aside as legal reserve	10.00%
Companies Act [Member] \| Maximum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus over stated capital	25.00%
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus available for dividends over stated capital	25.00%
Banking Law [Member] \| Minimum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of cash dividends and certain appropriations of retained earnings associated with cash set aside as legal reserve	20.00%
Banking Law [Member] \| Maximum [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus over stated capital	100.00%
Percentage of aggregate amount of legal reserve set aside as an appropriation of retained earnings and the legal capital surplus available for dividends over stated capital	100.00%
Code and Japanese GAAP [Member]
Retained Earnings Appropriated and Transferred [Line Items]
Common stock issued, Value				¥ 924,400
Preferred stock issued, Value				222,100
Common stock and preferred stock issued, Value			¥ 1,383,052
Legal capital surplus			3,577,570	2,838,693
Retained earnings			¥ 757,458
Japanese GAAP [Member]
Retained Earnings Appropriated and Transferred [Line Items]
MUFG's amount available for dividends	¥ 4,298,735

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Changes in Accumulated OCI, Net of Tax and Net of Noncontrolling Interests) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gains (losses) on investment securities, Balance at beginning of fiscal year	[1]	¥ (369,369)	¥ 2,270,346	¥ 2,032,807
Net unrealized gains (losses) on investment securities, Net change during the fiscal year	[1]	24,584	60,616	244,249
Net unrealized gains (losses) on investment securities, Balance at end of fiscal year	[1]	(344,785)	(369,369)	2,270,346
Net debt valuation adjustments, Balance at beginning of fiscal year		(8,670)	(16,488)	(10,632)
Net debt valuation adjustments, Net change during the fiscal year		54,172	9,729	(2,178)
Net debt valuation adjustments, Balance at end of fiscal year		45,502	(8,670)	(16,488)
Net unrealized losses on derivatives qualifying for cash flow hedges, Balance at beginning of fiscal year		(24,140)	(19,250)	(8,729)
Net unrealized losses on derivatives qualifying for cash flow hedges, Net change during the fiscal year		10,797	(4,890)	(7,025)
Net unrealized losses on derivatives qualifying for cash flow hedges, Balance at end of fiscal year		(13,343)	(24,140)	(19,250)
Defined benefit plans, Balance at beginning of fiscal year		(208,273)	(119,593)	(214,062)
Defined benefit plans, Net change during the fiscal year		(129,645)	(88,680)	109,012
Defined benefit plans, Balance at end of fiscal year		(337,918)	(208,273)	(119,593)
Foreign currency translation adjustments, Balance at beginning of fiscal year		326,183	362,300	482,039
Foreign currency translation adjustments, Net change during the fiscal year		(96,056)	(36,117)	(119,213)
Foreign currency translation adjustments, Balance at end of fiscal year		230,127	326,183	362,300
Accumulated other comprehensive income (loss), net of taxes: Balance at end of fiscal year		¥ (420,417)	(284,269)	2,477,315
Net Unrealized Gains (Losses) on Investment Securities [Member] \| Foreign Affiliated Company [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]			118
Net Unrealized Gains (Losses) on Investment Securities [Member] \| Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]			(6,828)
Net Unrealized Gains (Losses) on Investment Securities [Member] \| Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance	[1]		(2,700,331)
Net Debt Valuation Adjustments [Member] \| Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance				(3,678)
Net Debt Valuation Adjustments [Member] \| Recognition and Measurement of Financial Assets and Financial Liabilities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance			¥ (1,911)
Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] \| Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance				(3,496)
Defined Benefit Plans [Member] \| Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance				(14,543)
Foreign Currency Translation Adjustments [Member] \| Reclassification of Certain Tax Effects [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Effect of adopting new guidance				¥ (526)

[1]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 and 2020.

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) (Before Tax and Net of Tax Changes in Each Component of Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Net unrealized gains (losses) on investment securities, Before tax:
Net unrealized gains on investment securities	[1]	¥ 100,974	¥ 132,723	¥ 631,154
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		(107,102)	(28,953)	(280,258)
Net change		(6,128)	103,770	350,896
Net unrealized gains (losses) on investment securities, Tax (expense) or benefit:
Net unrealized gains on investment securities	[1]	(2,260)	(24,690)	(204,916)
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		32,007	9,100	84,328
Net change		29,747	(15,590)	(120,588)
Net unrealized gains (losses) on investment securities, Net of tax:
Net unrealized gains on investment securities	[1]	98,714	108,033	426,238
Reclassification adjustment for gains included in net income before attribution of noncontrolling interests		(75,095)	(19,853)	(195,930)
Net change	[1]	23,619	88,180	230,308
Net unrealized gains (losses) on investment securities attributable to noncontrolling interests		(965)	27,564	(13,941)
Net unrealized gains on investment securities attributable to Mitsubishi UFJ Financial Group	[1]	24,584	60,616	244,249
Net debt valuation adjustments, Before tax:
Net debt valuation adjustments		77,765	13,006	(3,555)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		315	1,016	417
Net change		78,080	14,022	(3,138)
Net debt valuation adjustments, Tax (expense) or benefit:
Net debt valuation adjustments		(23,812)	(3,982)	1,088
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		(96)	(311)	(128)
Net change		(23,908)	(4,293)	960
Net debt valuation adjustments, Net of tax:
Net debt valuation adjustments		53,953	9,024	(2,467)
Reclassification adjustment for losses included in net income before attribution of noncontrolling interests		219	705	289
Net change		54,172	9,729	(2,178)
Net debt valuation adjustments attributable to noncontrolling interests
Net debt valuation adjustments attributable to Mitsubishi UFJ Financial Group		54,172	9,729	(2,178)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Before tax:
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges		1,375	(10,397)	(3,430)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		13,279	3,662	(8,016)
Net change		14,654	(6,735)	(11,446)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Tax (expense) or benefit:
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges		(560)	2,825	1,571
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(3,452)	(980)	2,850
Net change		(4,012)	1,845	4,421
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges, Net of tax:
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges		815	(7,572)	(1,859)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		9,827	2,682	(5,166)
Net change		10,642	(4,890)	(7,025)
Net unrealized losses on derivatives qualifying for cash flow hedges attributable to noncontrolling interests		(155)
Net unrealized gains (losses) on derivatives qualifying for cash flow hedges attributable to Mitsubishi UFJ Financial Group		10,797	(4,890)	(7,025)
Defined benefit plans, Before tax:
Defined benefit plans		(195,851)	(126,001)	154,708
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		6,643	(1,168)	5,904
Net change		(189,208)	(127,169)	160,612
Defined benefit plans, Tax (expense) or benefit:
Defined benefit plans		59,426	37,655	(48,537)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(1,741)	574	(2,237)
Net change		57,685	38,229	(50,774)
Defined benefit plans, Net of tax:
Defined benefit plans		(136,425)	(88,346)	106,171
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		4,902	(594)	3,667
Net change		(131,523)	(88,940)	109,838
Defined benefit plans attributable to noncontrolling interests		(1,878)	(260)	826
Defined benefit plans attributable to Mitsubishi UFJ Financial Group		(129,645)	(88,680)	109,012
Foreign currency translation adjustments, Before tax:
Foreign currency translation adjustments		(99,520)	(18,062)	(137,811)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(2,238)	(9,002)	(1,494)
Net change		(101,758)	(27,064)	(139,305)
Foreign currency translation adjustments, Tax (expense) or benefit:
Foreign currency translation adjustments		19,588	(17,932)	32,767
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		1,105	2,784	1,760
Net change		20,693	(15,148)	34,527
Foreign currency translation adjustments, Net of tax:
Foreign currency translation adjustments		(79,932)	(35,994)	(105,044)
Reclassification adjustment for losses (gains) included in net income before attribution of noncontrolling interests		(1,133)	(6,218)	266
Net change		(81,065)	(42,212)	(104,778)
Foreign currency translation adjustments attributable to noncontrolling interests		14,991	(6,095)	14,435
Foreign currency translation adjustments attributable to Mitsubishi UFJ Financial Group		(96,056)	(36,117)	(119,213)
Other comprehensive income (loss) attributable to Mitsubishi UFJ Financial Group		¥ (136,148)	¥ (59,342)	¥ 224,845

[1]	Included unrealized gains (losses) related to only debt securities for the fiscal year ended March 31, 2019 and 2020.

Accumulated Other Comprehensi_5

Accumulated Other Comprehensive Income (Loss) (Reclassification of Significant Items out of Accumulated OCI) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)—net	[1],[2]	¥ 532,248	¥ 252,307	¥ (286,903)
Equity in earnings of equity method investees—net		(282,712)	(209,732)	(227,984)
Interest income on Loans, including fees		(2,597,932)	(2,576,417)	(2,271,219)
Other non-interest income		(88,422)	(103,665)	(63,978)
Other non-interest expenses		(367,721)	(302,687)	(329,314)
Total before tax		(433,220)	(870,842)	(1,661,819)
Income tax expense		114,505	133,237	407,823
Net of tax		(318,715)	(737,605)	(1,253,996)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax		(89,103)	(34,445)	(283,447)
Income tax expense		27,823	11,167	86,573
Net of tax		(61,280)	(23,278)	(196,874)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Gains (Losses) on Investment Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other		(499)	(367)	262
Total before tax		(107,102)	(28,953)	(280,258)
Income tax expense		32,007	9,100	84,328
Net of tax		(75,095)	(19,853)	(195,930)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Gains (Losses) on Investment Securities [Member] \| Net Gains on Sales and Redemptions of Available-for-sale debt Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)—net	[3]	(108,193)	(29,182)	(287,279)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Gains (Losses) on Investment Securities [Member] \| Impairment Losses on Investment Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Investment securities gains (losses)—net		1,590	596	6,759
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Debt Valuation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Equity in earnings of equity method investees—net		315	1,016	417
Total before tax		315	1,016	417
Income tax expense		(96)	(311)	(128)
Net of tax		219	705	289
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other		2	(77)	(234)
Total before tax		13,279	3,662	(8,016)
Income tax expense		(3,452)	(980)	2,850
Net of tax		9,827	2,682	(5,166)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] \| Interest Rate Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income on Loans, including fees		9,878	3,739	(7,782)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Net Unrealized Losses (Gains) on Derivatives Qualifying for Cash Flow Hedges [Member] \| Foreign Exchange Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense on Long-term debt or Foreign exchange losses—net		3,399
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Defined Benefit Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax		6,643	(1,168)	5,904
Income tax expense		(1,741)	574	(2,237)
Net of tax		4,902	(594)	3,667
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Defined Benefit Plans [Member] \| Net actuarial loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[4]	15,488	11,431	17,280
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Defined Benefit Plans [Member] \| Prior service cost [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[4]	(5,718)	(6,269)	(6,959)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Defined Benefit Plans [Member] \| Gain on settlements and curtailment, and other [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest expenses	[4]	(3,127)	(6,330)	(4,417)
Reclassification out of Accumulated Other Comprehensive Income [Member] \| Foreign Currency Translation Adjustments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other non-interest income		(5,003)	(9,004)	(5,743)
Other non-interest expenses		2,765	2	4,249
Total before tax		(2,238)	(9,002)	(1,494)
Income tax expense		1,105	2,784	1,760
Net of tax		¥ (1,133)	¥ (6,218)	¥ 266

[1]	New guidance on recognition and measurement of financial assets and financial liabilities requires equity investments to be measured at fair value with changes in fair value recognized in net income from the fiscal year ended March 31, 2019. For additional information, refer to Note 1.
[2]	The following credit losses are included in Investment securities gains (losses)—net: Decline in fair value by ¥99 million, ¥596 million and ¥1,467 million; Other comprehensive income—net by ¥15 million, ¥10 million and ¥123 million; Total credit losses by ¥114 million, ¥606 million and ¥1,590 million, for the twelve months ended March 31, 2018, 2019 and 2020, respectively.
[3]	Included unrealized gains (losses) related to only debt securities for the fiscal years ended March 31, 2019 and 2020 while included unrealized gains (losses) related to both debt and equity securities for the fiscal year ended March 31, 2018.
[4]	These Accumulated OCI components are components of net periodic benefit cost. See Note 13 for more information.

Regulatory Capital Requiremen_3

Regulatory Capital Requirements (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2015
Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Risk weighted threshold of items not deducted from Common Equity Tier 1 capital	250.00%
FSA's requirements applicable to Japanese banking institutions [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio	4.50%		4.50%
Capital conservation buffer	2.50%		2.50%
G-SIB surcharge	1.50%		1.50%
Countercyclical buffer	0.01%		0.04%
Tier 1 Leverage Ratio	3.00%
Percentage of G-SIB leverage ratio buffer to G-SIB capital surcharge, effective on January 1, 2022	50.00%
Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum capital ratio required for financial Instruments firms to maintain by Financial Instruments and Exchange Act and related ordinance	120.00%
Minimum capital ratio requirement for financial instruments firms which will call for regulatory reporting	140.00%
Minimum capital ratio requirement for financial instrument firms which may lead to a suspension of all or part of the business for a period of time and cancellation of a registration	100.00%
U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Common Equity Tier 1 capital ratio	4.50%
Capital conservation buffer	2.50%
Total minimum Common Equity Tier 1 capital ratio	7.00%
Countercyclical buffer	2.50%
Tier 1 Leverage Ratio	4.00%
Tier 1 Supplementary Leverage Ratio	3.00%
Phase-in period to eliminate the Accumulated OCI or loss exclusion applied under Basel I and Basel II rules	4 years
Capital conservation buffer phase-in arrangements	0.625%
Phase-in period for full implementation of capital conservation buffer	4 years
Mitsubishi UFJ Morgan Stanley Securities [Member] \| Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets	¥ 465,343		¥ 469,272
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks	316.20%		332.20%
MUAH [Member] \| U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Approximate increase in regulatory capital ratios due to recent regulatory guidance					0.50%
Stand-alone, Mitsubishi UFJ Morgan Stanley Securities [Member] \| Basel III for Security Companies in Japan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Amount of capital accounts less certain fixed assets	¥ 440,520		¥ 446,609
Percentage of capital accounts to the total amounts equivalent to market, counterparty credit and operational risks	313.00%		331.60%
BK (US) [Member] \| U.S. Basel III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum total risk-based capital ratio to be categorized as "well capitalized"		10.00%		10.00%
Tier 1 risk-based capital ratio to be categorized as "well capitalized"		8.00%		8.00%
Tier 1 capital to quarterly average assets to be categorized as "well capitalized"		5.00%		5.00%
Common Equity Tier 1 risk-based capital ratio to be categorized as "well capitalized"		6.50%		6.50%

Regulatory Capital Requiremen_4

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, Japan) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Consolidated, MUFG [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount	[1]	¥ 18,279,566	¥ 18,769,793
Total capital (to risk-weighted assets): Actual ratio	[1]	15.87%	16.03%
Tier 1 capital (to risk-weighted assets): Actual amount	[1]	¥ 15,623,321	¥ 16,276,301
Tier 1 capital (to risk-weighted assets): Actual ratio	[1]	13.56%	13.90%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount	[1]	¥ 13,708,333	¥ 14,322,407
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio	[1]	11.90%	12.23%
Leverage Ratio: Actual amount	[2]	¥ 15,623,321	¥ 16,276,301
Leverage Ratio: Actual ratio	[2]	4.42%	4.94%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 13,827,788	¥ 14,097,771
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	12.01%	12.04%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 11,525,076	¥ 11,755,949
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	10.01%	10.04%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes	[1]	¥ 9,798,042	¥ 9,999,582
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes	[1]	8.51%	8.54%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 10,593,527	¥ 9,871,460
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%	3.00%
Consolidated, MUFG [Member] \| FSA's requirements applicable to Japanese banking institutions [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Capital conservation buffer		2.50%	2.50%
G-SIB surcharge		1.50%	1.50%
Countercyclical buffer		0.01%	0.04%
Consolidated, BK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 14,285,601	¥ 14,632,620
Total capital (to risk-weighted assets): Actual ratio		14.43%	14.42%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 12,170,005	¥ 12,639,454
Tier 1 capital (to risk-weighted assets): Actual ratio		12.29%	12.46%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 10,597,133	¥ 10,990,820
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		10.70%	10.83%
Leverage Ratio: Actual amount	[2]	¥ 12,170,005	¥ 12,639,454
Leverage Ratio: Actual ratio	[2]	4.21%	4.63%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 7,917,895	¥ 8,114,105
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 5,938,421	¥ 6,085,579
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 4,453,816	¥ 4,564,184
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 8,656,169	¥ 8,189,494
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%	3.00%
Consolidated, TB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 1,889,973	¥ 2,213,195
Total capital (to risk-weighted assets): Actual ratio		25.46%	24.40%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,625,712	¥ 1,928,955
Tier 1 capital (to risk-weighted assets): Actual ratio		21.90%	21.26%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,444,348	¥ 1,775,565
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		19.46%	19.57%
Leverage Ratio: Actual amount	[2]	¥ 1,625,712	¥ 1,928,955
Leverage Ratio: Actual ratio	[2]	4.51%	5.09%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 593,652	¥ 725,540
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 445,239	¥ 544,155
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 333,929	¥ 408,116
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 1,079,863	¥ 1,135,795
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%	3.00%
Stand-alone, BK [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 12,092,262	¥ 13,560,583
Total capital (to risk-weighted assets): Actual ratio		14.76%	15.58%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 10,254,608	¥ 11,773,839
Tier 1 capital (to risk-weighted assets): Actual ratio		12.52%	13.53%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 8,738,975	¥ 10,172,206
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		10.67%	11.69%
Leverage Ratio: Actual amount	[2]	¥ 10,254,608	¥ 11,773,839
Leverage Ratio: Actual ratio	[2]	4.02%	4.84%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 6,550,969	¥ 6,959,207
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 4,913,227	¥ 5,219,405
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 3,684,920	¥ 3,914,554
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 7,644,928	¥ 7,284,812
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%	3.00%
Stand-alone, TB [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		¥ 2,131,514	¥ 2,195,098
Total capital (to risk-weighted assets): Actual ratio		25.42%	24.25%
Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,867,723	¥ 1,911,237
Tier 1 capital (to risk-weighted assets): Actual ratio		22.27%	21.12%
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		¥ 1,686,723	¥ 1,758,237
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		20.11%	19.42%
Leverage Ratio: Actual amount	[2]	¥ 1,867,723	¥ 1,911,237
Leverage Ratio: Actual ratio	[2]	5.87%	5.55%
Total capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 670,714	¥ 723,953
Total capital (to risk-weighted assets): Ratio for capital adequacy purposes		8.00%	8.00%
Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 503,035	¥ 542,965
Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		6.00%	6.00%
Common Equity Tier 1 capital (to risk-weighted assets): Amount for capital adequacy purposes		¥ 377,276	¥ 407,224
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for capital adequacy purposes		4.50%	4.50%
Leverage Ratio: Amount for capital adequacy purposes	[2]	¥ 953,353	¥ 1,031,484
Leverage Ratio: Ratio for capital adequacy purposes	[2]	3.00%	3.00%

[1]	Effective March 31, 2016, the FSA’s capital conservation buffer, countercyclical buffer and G-SIB surcharge requirements became applicable to Japanese banking institutions with international operations conducted through foreign offices. As a result, in addition to the 4.50% minimum Common Equity Tier 1 capital ratio, MUFG is required to maintain a capital conservation buffer of 2.5% and a G-SIB surcharge of 1.5% as of March 31, 2019 and 2020, and the countercyclical buffer of 0.04% and 0.01% as of March 31, 2019 and 2020, respectively.
[2]	Effective as of March 31, 2019, the minimum leverage ratio requirement was adopted by the FSA.

Regulatory Capital Requiremen_5

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, United States of America, MUAH) (Detail) - MUAH [Member] - U.S. Basel III [Member] - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		$ 15,769	$ 14,904
Tier 1 capital (to risk-weighted assets): Actual amount		15,086	14,256
Tier 1 capital (to quarterly average assets): Actual amount	[1]	15,086	14,256
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		$ 15,086	$ 14,256
Total capital (to risk-weighted assets): Actual ratio		14.73%	14.60%
Tier 1 capital (to risk-weighted assets): Actual ratio		14.10%	13.96%
Tier 1 capital (to quarterly average assets): Actual ratio	[1]	8.88%	8.77%
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		14.10%	13.96%
Total capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 11,237	$ 10,081
Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	9,097	8,039
Tier 1 capital (to quarterly average assets): Amount for minimum capital ratios required	[1],[2]	6,792	6,502
Common Equity Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 7,492	$ 6,508
Total capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	10.50%	9.875%
Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	8.50%	7.875%
Tier 1 capital (to quarterly average assets): Ratio for minimum capital ratios required	[1],[2]	4.00%	4.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	7.00%	6.375%
Capital conservation buffer		2.50%	1.875%

[1]	Excludes certain deductions.
[2]	The minimum capital requirement includes a capital conservation buffer of 1.875% at December 31, 2018 and 2.5% at December 31, 2019.

Regulatory Capital Requiremen_6

Regulatory Capital Requirements (Risk-adjusted Capital Amounts and Ratios, United States of America, MUB) (Detail) - BK (US) [Member] - U.S. Basel III [Member] - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets): Actual amount		$ 14,746	$ 13,905
Tier 1 capital (to risk-weighted assets): Actual amount		14,115	13,316
Tier 1 capital (to quarterly average assets): Actual amount	[1]	14,115	13,316
Common Equity Tier 1 capital (to risk-weighted assets): Actual amount		$ 14,115	$ 13,316
Total capital (to risk-weighted assets): Actual ratio		15.11%	15.09%
Tier 1 capital (to risk-weighted assets): Actual ratio		14.47%	14.45%
Tier 1 capital (to quarterly average assets): Actual ratio	[1]	10.65%	10.61%
Common Equity Tier 1 capital (to risk-weighted assets): Actual ratio		14.47%	14.45%
Total capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 10,244	$ 9,102
Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	8,293	7,258
Tier 1 capital (to quarterly average assets): Amount for minimum capital ratios required	[1],[2]	5,304	5,018
Common Equity Tier 1 capital (to risk-weighted assets): Amount for minimum capital ratios required	[2]	$ 6,829	$ 5,876
Total capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	10.50%	9.875%
Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	8.50%	7.875%
Tier 1 capital (to quarterly average assets): Ratio for minimum capital ratios required	[1],[2]	4.00%	4.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratio for minimum capital ratios required	[2]	7.00%	6.375%
Total capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		$ 9,756	$ 9,217
Tier 1 capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		7,805	7,374
Tier 1 capital (to quarterly average assets): Amount OCC requires to be "well capitalized"	[1]	6,629	6,273
Common Equity Tier 1 capital (to risk-weighted assets): Amount OCC requires to be "well capitalized"		$ 6,342	$ 5,991
Total capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		10.00%	10.00%
Tier 1 capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		8.00%	8.00%
Tier 1 capital (to quarterly average assets): Ratios OCC requires to be "well capitalized"	[1]	5.00%	5.00%
Common Equity Tier 1 capital (to risk-weighted assets): Ratios OCC requires to be "well capitalized"		6.50%	6.50%
Capital conservation buffer		2.50%	1.875%

[1]	Excludes certain deductions.
[2]	Beginning January 1, 2018 and 2019, the minimum capital requirement includes a capital conservation buffer of 1.875% and 2.5%, respectively.

Earnings Per Common Share App_3

Earnings Per Common Share Applicable to Common Shareholders of MUFG (Reconciliations of Net Income and Weighted Average Number of Common Shares Outstanding Used for Computation of Basic EPS to Adjusted Amounts for Computation of Diluted EPS) (Detail) - JPY (¥) ¥ / shares in Units, shares in Thousands, ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income (Numerator):
Net income attributable to Mitsubishi UFJ Financial Group		¥ 305,955	¥ 718,645	¥ 1,228,160
Effect of dilutive instruments:
Stock acquisition rights and restricted stock units—Morgan Stanley		(2,861)	(3,745)	(3,826)
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group and assumed conversions		¥ 303,094	¥ 714,900	¥ 1,224,334
Shares (Denominator):
Weighted average common shares outstanding		12,912,790	13,058,698	13,291,842
Effect of dilutive instruments:
Stock acquisition rights and the common shares of MUFG under the Board Incentive Plan	[1]	166	484	1,650
Weighted average common shares for diluted computation		12,912,956	13,059,182	13,293,492
Basic earnings per common share:
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group		¥ 23.69	¥ 55.03	¥ 92.40
Diluted earnings per common share:
Earnings applicable to common shareholders of Mitsubishi UFJ Financial Group	[1]	¥ 23.47	¥ 54.74	¥ 92.10

[1]	For the fiscal years ended March 31, 2019 and 2020, the performance-based plan under the Board Incentive Plan could potentially dilute earnings per common share but were not included in the computation of diluted earnings per common share due to their antidilutive effects.

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Detail) - JPY (¥) ¥ in Billions		12 Months Ended
		Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash Flow Hedge:
Derivative, Notional Amount	[1]	¥ 1,803,700		¥ 1,656,900
Credit Derivatives:
Carrying value of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		65		35
Notional amounts of credit protection, offsetting with purchased protection with identical underlying referenced entities, in approximate		3,544		2,687
Credit Risk, Liquidity Risk and Credit-risk-related Contingent Features:
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a liability position, in approximate		600		600
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a liability position, posted collateral, in approximate		152		85
Additional collateral amount which could be requested if the MUFG Group's debt falls below investment grade		58		84
Early termination amount which could be requested if the MUFG Group's debt falls below investment grade		80		56
Interest Rate Contracts [Member]
Cash Flow Hedge:
Derivative, Notional Amount	[1]	¥ 1,553,500		¥ 1,409,600
MUAH [Member]
Cash Flow Hedge:
Approximate losses expected to be reclassified to net interest income during the twelve months ending December 31, 2020			¥ 7.3
Fair Value Hedges:
Type of fair value hedging instruments used in interest rate hedging strategy		interest rate derivatives
Objective for interest rate hedging strategy		mitigated the changes in fair value of the hedged liability caused by changes in the designated interest rate, LIBOR.
Fair value hedges
MUAH [Member] \| Interest Rate Contracts [Member] \| Maximum [Member]
Fair Value Hedges:
Losses on the hedging instruments					¥ 1
Gains on the hedged liability					¥ 1
MUAH [Member] \| Cash Flow Hedging [Member] \| Weighted Average [Member]
Cash Flow Hedge:
Remaining life of the active cash flow hedges, in years			3 years 1 month 6 days
MUAH [Member] \| Cash Flow Hedging [Member] \| Interest Rate Contracts [Member] \| Interest Rates From Variable Rate Loans [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 1,457.1
MUAH [Member] \| Cash Flow Hedging [Member] \| Interest Rate Contracts [Member] \| Interest Rate On LIBOR indexed short-term borrowings [Member]
Cash Flow Hedge:
Derivative, Notional Amount			¥ 7.6

[1]	Includes both written and purchased positions.

Derivative Financial Instrume_4

Derivative Financial Instruments (Notional Amounts of Derivative Contracts) (Detail) - JPY (¥) ¥ in Trillions		Mar. 31, 2020	Mar. 31, 2019
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 1,803.7	¥ 1,656.9
Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	1,553.5	1,409.6
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	230.2	230.5
Equity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	8.1	6.4
Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	0.1	0.2
Credit Derivatives [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	8.7	7.2
Other [Member]
Derivative [Line Items]
Notional amounts of derivatives	[1]	¥ 3.1	¥ 3

[1]	Includes both written and purchased positions.

Derivative Financial Instrume_5

Derivative Financial Instruments (Fair Value Information on Derivative Instruments Recorded on Consolidated Balance Sheets) (Detail) - JPY (¥) ¥ in Billions		Mar. 31, 2020	Mar. 31, 2019
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	¥ 14,958	¥ 13,205
Fair value of derivative liabilities	[1],[2],[3]	14,034	12,710
Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	10,847	10,109
Fair value of derivative liabilities	[1],[2],[3]	10,205	9,896
Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	3,734	2,795
Fair value of derivative liabilities	[1],[2],[3]	3,608	2,671
Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	236	188
Fair value of derivative liabilities	[1],[2],[3]	277	183
Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	26	27
Fair value of derivative liabilities	[1],[2],[3]	26	27
Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	114	84
Fair value of derivative liabilities	[1],[2],[3]	95	69
Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[3]	1	2
Fair value of derivative liabilities	[1],[2],[3],[4]	(177)	(136)
Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	14,958	13,204
Fair value of derivative liabilities	[1],[2],[5]	14,030	12,710
Not Designated as Hedging Instruments [Member] \| Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	10,847	10,108
Fair value of derivative liabilities	[1],[2],[5]	10,205	9,896
Not Designated as Hedging Instruments [Member] \| Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	3,734	2,795
Fair value of derivative liabilities	[1],[2],[5]	3,604	2,671
Not Designated as Hedging Instruments [Member] \| Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	236	188
Fair value of derivative liabilities	[1],[2],[5]	277	183
Not Designated as Hedging Instruments [Member] \| Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	26	27
Fair value of derivative liabilities	[1],[2],[5]	26	27
Not Designated as Hedging Instruments [Member] \| Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	114	84
Fair value of derivative liabilities	[1],[2],[5]	95	69
Not Designated as Hedging Instruments [Member] \| Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[5]	1	2
Fair value of derivative liabilities	[1],[2],[4],[5]	(177)	(136)
Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]		1
Fair value of derivative liabilities	[1],[2],[6]	4
Designated as Hedging Instruments [Member] \| Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]		1
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] \| Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]	4
Designated as Hedging Instruments [Member] \| Equity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] \| Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] \| Credit Derivatives [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[6]
Designated as Hedging Instruments [Member] \| Other [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	[1],[2],[6]
Fair value of derivative liabilities	[1],[2],[4],[6]

[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.
[4]	Other mainly includes bifurcated embedded derivatives carried at fair value, which are presented in Deposits and Long-term debt.
[5]	The derivative instruments which are not designated as a hedging instrument are held for trading and risk management purposes, and are presented in Trading account assets/liabilities except for (6).
[6]	The MUFG Group adopts hedging strategies and applies hedge accounting to certain derivative transactions entered into by certain subsidiaries. The derivative instruments which are designated as hedging instruments are presented in Other assets or Other liabilities on the accompanying consolidated balance sheets.

Derivative Financial Instrume_6

Derivative Financial Instruments (Gains and Losses for Trading and Risk Management Derivatives (Not Designated as Hedging Instruments)) (Detail) - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (593)	¥ (378)	¥ (387)
Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(173)	6	51
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(429)	(347)	(163)
Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	30	80	(260)
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)			6
Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	15	(40)	(2)
Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(36)	(77)	(19)
Foreign Exchange Gains (Losses)—Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(434)	(354)	(160)
Foreign Exchange Gains (Losses)—Net [Member] \| Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)—Net [Member] \| Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(429)	(347)	(163)
Foreign Exchange Gains (Losses)—Net [Member] \| Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)—Net [Member] \| Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)—Net [Member] \| Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Foreign Exchange Gains (Losses)—Net [Member] \| Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(5)	(7)	3
Trading Account Profits (Losses)—Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(159)	(24)	(227)
Trading Account Profits (Losses)—Net [Member] \| Interest Rate Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	(173)	6	51
Trading Account Profits (Losses)—Net [Member] \| Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)
Trading Account Profits (Losses)—Net [Member] \| Equity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	30	80	(260)
Trading Account Profits (Losses)—Net [Member] \| Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)			6
Trading Account Profits (Losses)—Net [Member] \| Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	15	(40)	(2)
Trading Account Profits (Losses)—Net [Member] \| Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Trading and risk management derivatives gains and losses (Not designated as hedging instruments)	¥ (31)	¥ (70)	¥ (22)

Derivative Financial Instrume_7

Derivative Financial Instruments (Protection Sold Through Credit Default Swaps) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020		Mar. 31, 2019
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		¥ 448,290		¥ 590,984
Maximum potential/Notional amount, Expiring in 1-5 years		2,919,354		2,470,694
Maximum potential/Notional amount, Expiring over 5 years		563,987		162,805
Maximum potential/Notional amount, Total		3,931,631		3,224,483
Credit derivative (asset) liability at fair value	[1]	(68,903)		(40,085)
Protection sold [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		448,290		513,291
Maximum potential/Notional amount, Expiring in 1-5 years		2,919,354		2,470,694
Maximum potential/Notional amount, Expiring over 5 years		563,987		162,805
Maximum potential/Notional amount, Total		3,931,631		3,146,790
Credit derivative (asset) liability at fair value	[1]	(68,903)		(39,465)
Protection sold [Member] \| Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		399,994		491,428
Maximum potential/Notional amount, Expiring in 1-5 years		2,411,724		1,847,389
Maximum potential/Notional amount, Expiring over 5 years		543,721		151,361
Maximum potential/Notional amount, Total		3,355,439		2,490,178
Credit derivative (asset) liability at fair value	[1]	(60,515)		(30,477)
Protection sold [Member] \| Single Name Credit Default Swaps [Member] \| Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]	303,870		378,527
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	2,125,006		1,603,962
Maximum potential/Notional amount, Expiring over 5 years	[2]	494,040		145,689
Maximum potential/Notional amount, Total	[2]	2,922,916		2,128,178
Credit derivative (asset) liability at fair value	[1],[2]	(63,855)		(30,303)
Protection sold [Member] \| Single Name Credit Default Swaps [Member] \| Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		93,671		112,901
Maximum potential/Notional amount, Expiring in 1-5 years		279,892		238,330
Maximum potential/Notional amount, Expiring over 5 years		49,681		5,672
Maximum potential/Notional amount, Total		423,244		356,903
Credit derivative (asset) liability at fair value	[1]	3,358		(127)
Protection sold [Member] \| Single Name Credit Default Swaps [Member] \| Not Rated [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		2,453
Maximum potential/Notional amount, Expiring in 1-5 years		6,826		5,097
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		9,279		5,097
Credit derivative (asset) liability at fair value	[1]	(18)		(47)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		48,296		21,863
Maximum potential/Notional amount, Expiring in 1-5 years		507,630		623,305
Maximum potential/Notional amount, Expiring over 5 years		20,266		11,444
Maximum potential/Notional amount, Total		576,192		656,612
Credit derivative (asset) liability at fair value	[1]	(8,388)		(8,988)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| BK [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less
Maximum potential/Notional amount, Expiring in 1-5 years		127,331		221,855
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		127,331		221,855
Credit derivative (asset) liability at fair value	[1]	(1,198)		(2,092)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| BK [Member] \| Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	28,296		120,854
Maximum potential/Notional amount, Expiring over 5 years	[2]
Maximum potential/Notional amount, Total	[2]	28,296		120,854
Credit derivative (asset) liability at fair value	[1],[2]	(3)		(82)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| BK [Member] \| Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less
Maximum potential/Notional amount, Expiring in 1-5 years		99,035		101,001
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		99,035		101,001
Credit derivative (asset) liability at fair value	[1]	(1,195)		(2,010)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| SCHD [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		48,296		21,863
Maximum potential/Notional amount, Expiring in 1-5 years		380,299		401,450
Maximum potential/Notional amount, Expiring over 5 years		20,266		11,444
Maximum potential/Notional amount, Total		448,861		434,757
Credit derivative (asset) liability at fair value	[1]	(7,190)		(6,896)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| SCHD [Member] \| Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less	[2]	20,000		13,000
Maximum potential/Notional amount, Expiring in 1-5 years	[2]	182,306		194,618
Maximum potential/Notional amount, Expiring over 5 years	[2]	14,950		8,000
Maximum potential/Notional amount, Total	[2]	217,256		215,618
Credit derivative (asset) liability at fair value	[1],[2]	(1,820)		(3,853)
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| SCHD [Member] \| Non-investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less
Maximum potential/Notional amount, Expiring in 1-5 years		7,595
Maximum potential/Notional amount, Expiring over 5 years
Maximum potential/Notional amount, Total		7,595
Credit derivative (asset) liability at fair value		(165)	[1]
Protection sold [Member] \| Index and Basket Credit Default Swaps Sold [Member] \| SCHD [Member] \| Not Rated [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less		28,296		8,863
Maximum potential/Notional amount, Expiring in 1-5 years		190,398		206,832
Maximum potential/Notional amount, Expiring over 5 years		5,316		3,444
Maximum potential/Notional amount, Total		224,010		219,139
Credit derivative (asset) liability at fair value	[1]	(5,205)		(3,043)
Other Credit Derivatives Sold [Member] \| Investment Grade [Member]
Credit Derivatives [Line Items]
Maximum potential/Notional amount, Expiring in 1 year or less				77,693	[3]
Maximum potential/Notional amount, Expiring in 1-5 years					[3]
Maximum potential/Notional amount, Expiring over 5 years					[3]
Maximum potential/Notional amount, Total				77,693	[3]
Credit derivative (asset) liability at fair value	[1]			¥ (620)	[3]

[1]	Fair value amounts are shown on a gross basis prior to cash collateral or counterparty netting.
[2]	The MUFG Group considers ratings of Baa3/BBB- or higher to meet the definition of investment grade.
[3]	Other credit derivatives primarily consist of total return swaps.

Obligations under Guarantees _3

Obligations under Guarantees and Other Off-balance Sheet Instruments (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 79,222,000	¥ 76,755,000
Contractual maturities of guarantees mainly comprised of guarantees of housing loans, in years	over 5 years
Carrying amounts of the liabilities related to guarantees and similar instruments	¥ 1,130,522	1,051,297
Allowance for off-balance sheet instruments	¥ 30,911	96,946
Lending-related commitments which expire within one year, in approximate percentage	67.00%
Lending-related commitments which expire from one year to five years, in approximate percentage	30.00%
Lending-related commitments which expire after five years, in approximate percentage	3.00%
Portion Syndicated out to Third Parties [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 455,800	468,900
Segregated Records of Trust Accounts [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	13,142,000	11,520,000
Options Sold [Member]
Guarantor Obligations [Line Items]
Amount of Obligations under Guarantees	¥ 1,090,921	¥ 1,005,951

Obligations under Guarantees _4

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual or Notional Amounts of Guarantees with Amount by Expiration Period) (Detail) - JPY (¥) ¥ in Billions		Mar. 31, 2020	Mar. 31, 2019
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		¥ 79,222	¥ 76,755
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		48,050	40,754
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		16,568	22,976
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		14,604	13,025
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		4,098	3,901
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		3,109	2,792
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		763	838
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		226	271
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		3,058	3,256
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		2,160	2,332
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		738	784
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		160	140
Derivative Instruments [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total	[1]	58,836	58,025
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less	[1]	36,021	29,734
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years	[1]	14,543	20,921
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years	[1]	8,272	7,370
Liabilities of Trust Accounts [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		13,142	11,520
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		6,752	5,884
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		451	420
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		5,939	5,216
Others [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Total		88	53
Maximum potential / Contractual or Notional amount, Expiring in 1 year or less		8	12
Maximum potential / Contractual or Notional amount, Expiring in 1-5 years		73	13
Maximum potential / Contractual or Notional amount, Expiring in Over 5 years		¥ 7	¥ 28

[1]	Credit derivatives sold by the MUFG Group are excluded from this presentation.

Obligations under Guarantees _5

Obligations under Guarantees and Other Off-balance Sheet Instruments (Maximum Potential Amount of Future Payments Classified Based upon Internal Credit Ratings) (Detail) - JPY (¥) ¥ in Billions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 79,222	¥ 76,755
Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		4,098	3,901
Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,058	3,256
Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		7,156	7,157
Normal [Member] \| Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		3,984	3,779
Normal [Member] \| Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		2,904	3,070
Normal [Member] \| Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 6,888	¥ 6,849
Close Watch [Member] \| Minimum [Member]
Guarantor Obligations [Line Items]
Accruing loans contractually past due, in day		90 days	90 days
Close Watch [Member] \| Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	¥ 93	¥ 98
Close Watch [Member] \| Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	96	79
Close Watch [Member] \| Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[1]	189	177
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] \| Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	17	21
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] \| Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	36	78
Likely to Become Bankrupt or Legally / Virtually Bankrupt [Member] \| Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade	[2]	53	99
Not Rated [Member] \| Standby Letters of Credit and Financial Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		4	3
Not Rated [Member] \| Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		22	29
Not Rated [Member] \| Standby Letters of Credit, Financial and Performance Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential / Contractual or Notional amount, Amount by borrower grade		¥ 26	¥ 32

[1]	Borrowers classified as Close Watch represent those that require close monitoring as the borrower has begun to exhibit elements of potential concern with respect to its business performance and financial condition, the borrower has begun to exhibit elements of serious concern with respect to its business performance and financial condition, including business problems requiring long-term solutions, or the borrower’s loans are TDRs or loans contractually past due 90 days or more for special reasons.
[2]	Borrowers classified as Likely to become Bankrupt or Legally/Virtually Bankrupt represent those that have a higher probability of default than those categorized as Close Watch due to serious debt repayment problems with poor progress in achieving restructuring plans, the borrower being considered virtually bankrupt with no prospects for an improvement in business operations, or the borrower being legally bankrupt with no prospects for continued business operations because of non-payment, suspension of business, voluntary liquidation or filing for legal liquidation.

Obligations under Guarantees _6

Obligations under Guarantees and Other Off-balance Sheet Instruments (Contractual Amounts with Regard to Other Off-balance Sheet Instruments) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2020	Mar. 31, 2019
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 76,398	¥ 77,273
Commercial Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	757	1,057
Commitments to Make Investments [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	247	240
Other [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contractual amounts with regard to other off-balance sheet instruments	¥ 5	¥ 5

Variable Interest Entities (Ass

Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Variable Interest Entity [Line Items]
Total assets	¥ 331,753,283	¥ 305,228,899	¥ 300,570,312
Consolidated assets, Cash and due from banks	33,283,032	33,924,340
Consolidated assets, Interest-earning deposits in other banks	45,266,680	40,646,920
Consolidated assets, Trading account assets	47,504,058	40,576,618
Consolidated assets, Investment securities	43,751,242	44,938,004
Consolidated assets, Loans	117,377,199	116,225,757
Total liabilities	316,008,767	289,244,151
Consolidated liabilities, Deposits	203,954,528	199,280,789
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total assets	18,847,661	18,220,086
Consolidated assets, Cash and due from banks	846	7
Consolidated assets, Interest-earning deposits in other banks	30,047	23,655
Consolidated assets, Trading account assets	695,069	528,690
Consolidated assets, Investment securities	1,804,459	1,828,194
Consolidated assets, Loans	16,072,595	15,545,328
Consolidated assets, All other assets	244,645	294,212
Total liabilities	598,152	572,714
Consolidated liabilities, Deposits
Consolidated liabilities, Other short-term borrowings	30,831	20,535
Consolidated liabilities, Long-term debt	465,352	490,033
Consolidated liabilities, All other liabilities	101,969	62,146
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member]
Variable Interest Entity [Line Items]
Total assets	25,725,510	25,992,862
Consolidated assets, Cash and due from banks	104,461	93,178
Consolidated assets, Interest-earning deposits in other banks	53,474	53,016
Consolidated assets, Trading account assets	705,661	533,792
Consolidated assets, Investment securities	2,094,026	1,891,525
Consolidated assets, Loans	22,502,475	23,097,643
Consolidated assets, All other assets	265,413	323,708
Total liabilities	25,108,870	25,171,410
Consolidated liabilities, Deposits	6,743,261	7,616,575
Consolidated liabilities, Other short-term borrowings	4,415,647	4,735,822
Consolidated liabilities, Long-term debt	11,839,934	12,007,173
Consolidated liabilities, All other liabilities	2,110,028	811,840
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	6,263,082	6,698,146
Consolidated assets, Cash and due from banks	102,781	92,310
Consolidated assets, Interest-earning deposits in other banks	31,625	26,101
Consolidated assets, Trading account assets	12,989	3,005
Consolidated assets, Investment securities	1,195,283	1,424,444
Consolidated assets, Loans	4,913,939	5,124,462
Consolidated assets, All other assets	6,465	27,824
Total liabilities	6,253,318	6,691,362
Consolidated liabilities, Other short-term borrowings	4,327,685	4,678,588
Consolidated liabilities, Long-term debt	1,478,921	1,552,572
Consolidated liabilities, All other liabilities	446,712	460,202
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	493,757	680,922
Consolidated assets, Interest-earning deposits in other banks	16,482	14,113
Consolidated assets, Trading account assets	314,074	477,239
Consolidated assets, Investment securities	34,121	18,118
Consolidated assets, All other assets	129,080	171,452
Total liabilities	15,817	6,852
Consolidated liabilities, Long-term debt	5,546	5,158
Consolidated liabilities, All other liabilities	10,271	1,694
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	204,047	203,458
Consolidated assets, Interest-earning deposits in other banks	2,658	2,214
Consolidated assets, Loans	119,348	127,243
Consolidated assets, All other assets	82,041	74,001
Total liabilities	114,357	114,469
Consolidated liabilities, Other short-term borrowings		609
Consolidated liabilities, Long-term debt	112,474	111,523
Consolidated liabilities, All other liabilities	1,883	2,337
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	249,529	279,327
Consolidated assets, Cash and due from banks	1,330	506
Consolidated assets, Trading account assets	42,052	53,346
Consolidated assets, Investment securities	118,776	137,509
Consolidated assets, Loans	86,859	86,753
Consolidated assets, All other assets	512	1,213
Total liabilities	251,056	277,179
Consolidated liabilities, Other short-term borrowings	65,965	48,014
Consolidated liabilities, Long-term debt	163,833	174,215
Consolidated liabilities, All other liabilities	21,258	54,950
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Securitization of MUFG Group's Assets [Member]
Variable Interest Entity [Line Items]
Total assets	10,956,261	10,208,496
Consolidated assets, Loans	10,933,580	10,183,624
Consolidated assets, All other assets	22,681	24,872
Total liabilities	10,924,830	10,167,632
Consolidated liabilities, Other short-term borrowings	16,008
Consolidated liabilities, Long-term debt	10,077,839	10,162,231
Consolidated liabilities, All other liabilities	830,983	5,401
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Trust Arrangements [Member]
Variable Interest Entity [Line Items]
Total assets	7,527,539	7,888,210
Consolidated assets, Interest-earning deposits in other banks	654	8,953
Consolidated assets, Trading account assets	336,546	202
Consolidated assets, Investment securities	745,846	311,412
Consolidated assets, Loans	6,441,864	7,565,862
Consolidated assets, All other assets	2,629	1,781
Total liabilities	7,522,190	7,881,332
Consolidated liabilities, Deposits	6,743,261	7,616,575
Consolidated liabilities, All other liabilities	778,929	264,757
Consolidated VIEs [Member] \| Consolidated VIEs before Elimination [Member] \| Others [Member]
Variable Interest Entity [Line Items]
Total assets	31,295	34,303
Consolidated assets, Cash and due from banks	350	362
Consolidated assets, Interest-earning deposits in other banks	2,055	1,635
Consolidated assets, Investment securities		42
Consolidated assets, Loans	6,885	9,699
Consolidated assets, All other assets	22,005	22,565
Total liabilities	27,302	32,584
Consolidated liabilities, Other short-term borrowings	5,989	8,611
Consolidated liabilities, Long-term debt	1,321	1,474
Consolidated liabilities, All other liabilities	19,992	22,499
Consolidated VIEs [Member] \| Amounts Eliminated in Consolidation [Member]
Variable Interest Entity [Line Items]
Total assets	(6,877,849)	(7,772,776)
Consolidated assets, Cash and due from banks	(103,615)	(93,171)
Consolidated assets, Interest-earning deposits in other banks	(23,427)	(29,361)
Consolidated assets, Trading account assets	(10,592)	(5,102)
Consolidated assets, Investment securities	(289,567)	(63,331)
Consolidated assets, Loans	(6,429,880)	(7,552,315)
Consolidated assets, All other assets	(20,768)	(29,496)
Total liabilities	(15,045,398)	(14,676,389)
Consolidated liabilities, Deposits	(703)	(50,396)
Consolidated liabilities, Other short-term borrowings	(2,526,893)	(2,996,041)
Consolidated liabilities, Long-term debt	(11,374,581)	(11,517,019)
Consolidated liabilities, All other liabilities	(1,143,221)	(112,933)
Consolidated VIEs [Member] \| Amount of Liabilities with Recourse to General Credit of MUFG Group [Member]
Variable Interest Entity [Line Items]
Total liabilities	(9,465,320)	(9,922,307)
Consolidated liabilities, Deposits	(6,742,558)	(7,566,179)
Consolidated liabilities, Other short-term borrowings	(1,857,923)	(1,719,246)
Consolidated liabilities, Long-term debt	(1)	(121)
Consolidated liabilities, All other liabilities	¥ (864,838)	¥ (636,761)

Variable Interest Entities (A_2

Variable Interest Entities (Assets and Liabilities of Non-consolidated Variable Interest Entities) (Detail) - Non-consolidated VIEs [Member] - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Variable Interest Entity [Line Items]
Total assets	¥ 183,548,754	¥ 213,008,709
Maximum exposure	17,327,744	19,106,098
On-balance sheet assets, Total assets	14,519,503	15,589,741
On-balance sheet assets, Trading account assets	1,416,760	1,254,322
On-balance sheet assets, Investment securities	4,421,833	5,242,402
On-balance sheet assets, Loans	8,457,932	8,914,380
On-balance sheet assets, All other assets	222,978	178,637
On-balance sheet liabilities, Total liabilities	404,430	73,687
On-balance sheet liabilities, All other liabilities	404,430	73,687
Asset-backed Conduits [Member]
Variable Interest Entity [Line Items]
Total assets	27,700,099	29,621,609
Maximum exposure	5,836,895	6,221,274
On-balance sheet assets, Total assets	4,797,551	4,982,357
On-balance sheet assets, Trading account assets	190	659
On-balance sheet assets, Investment securities	1,737,979	1,704,553
On-balance sheet assets, Loans	3,059,382	3,277,145
Investment Funds [Member]
Variable Interest Entity [Line Items]
Total assets	55,644,434	67,750,419
Maximum exposure	1,918,403	1,952,676
On-balance sheet assets, Total assets	1,712,037	1,753,823
On-balance sheet assets, Trading account assets	437,858	187,166
On-balance sheet assets, Investment securities	525,022	1,253,705
On-balance sheet assets, Loans	724,253	304,310
On-balance sheet assets, All other assets	24,904	8,642
On-balance sheet liabilities, Total liabilities	356,679	206
On-balance sheet liabilities, All other liabilities	356,679	206
Special Purpose Entities Created for Structured Financing [Member]
Variable Interest Entity [Line Items]
Total assets	37,026,192	42,676,571
Maximum exposure	3,601,834	3,972,450
On-balance sheet assets, Total assets	2,764,156	3,015,593
On-balance sheet assets, Trading account assets	392,588	252,597
On-balance sheet assets, Investment securities	35,774	48,895
On-balance sheet assets, Loans	2,317,128	2,709,008
On-balance sheet assets, All other assets	18,666	5,093
On-balance sheet liabilities, Total liabilities	6,058	9,827
On-balance sheet liabilities, All other liabilities	6,058	9,827
Repackaged Instruments [Member]
Variable Interest Entity [Line Items]
Total assets	8,215,327	12,885,367
Maximum exposure	3,030,263	3,477,545
On-balance sheet assets, Total assets	2,931,617	3,383,161
On-balance sheet assets, Trading account assets	394,478	690,305
On-balance sheet assets, Investment securities	2,123,058	2,169,798
On-balance sheet assets, Loans	361,184	478,252
On-balance sheet assets, All other assets	52,897	44,806
On-balance sheet liabilities, Total liabilities		6,087
On-balance sheet liabilities, All other liabilities		6,087
Others [Member]
Variable Interest Entity [Line Items]
Total assets	54,962,702	60,074,743
Maximum exposure	2,940,349	3,482,153
On-balance sheet assets, Total assets	2,314,142	2,454,807
On-balance sheet assets, Trading account assets	191,646	123,595
On-balance sheet assets, Investment securities		65,451
On-balance sheet assets, Loans	1,995,985	2,145,665
On-balance sheet assets, All other assets	126,511	120,096
On-balance sheet liabilities, Total liabilities	41,693	57,567
On-balance sheet liabilities, All other liabilities	¥ 41,693	¥ 57,567

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Narrative) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Allowance for repayment of excess interest	¥ 29,438	¥ 24,983
Provision (reversal) for repayment of excess interest recognized on Equity in earnings of equity method investee	¥ 7,800	¥ 15,632

Fees and Commissions Income (Na

Fees and Commissions Income (Narrative) (Detail) - JPY (¥) ¥ in Billions	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Contract Revenue [Line Items]
Receivables from contracts with customers included primarily in Other assets	¥ 192	¥ 185
Contract liabilities included primarily in Other liabilities	25	¥ 8
Insurance Agency Service [Member]
Disaggregation of Contract Revenue [Line Items]
Contract liabilities included primarily in Other liabilities	¥ 12
Contract liability service period	20 years

Fees and Commissions Income (De

Fees and Commissions Income (Details of Fees and Commissions Income) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		¥ 1,502,052	¥ 1,438,578	¥ 1,462,792
Deposits [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		53,684	52,624	53,483
Remittances and Transfers [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		169,407	168,756	169,300
Foreign Trading Business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		66,025	73,176	78,239
Credit card business [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		238,112	225,877	212,515
Security-related Services [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		221,494	233,448	258,728
Administration and management services for investment funds [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		184,559	147,597	159,481
Trust fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		119,919	115,002	112,399
Guarantee fees [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[1]	46,322	44,962	44,160
Insurance Commissions [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		44,415	46,918	49,223
Real Estate [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income		49,764	45,160	40,573
Others [Member]
Disaggregation of Contract Revenue [Line Items]
Fees and commissions income	[2]	¥ 308,351	¥ 285,058	¥ 284,691

[1]	Guarantee fees are not within the scope of the guidance on revenue from contracts with customers.
[2]	Other fees and commissions include non-refundable financing related fees that are not within the scope of the guidance on revenue from contracts with customers.

Trading Account Profits and L_3

Trading Account Profits and Losses (Net Trading Gains (Losses)) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Trading Account Profits And Losses [Abstract]
Interest rate and other derivative contracts		¥ (159,045)	¥ (24,031)	¥ (226,788)
Trading account securities, excluding derivatives		924,418	192,931	153,674
Trading account profits (losses)—net		765,373	168,900	(73,114)
Foreign exchange derivative contracts	[1]	(434,052)	(354,401)	(159,986)
Net trading gains (losses)		¥ 331,321	¥ (185,501)	¥ (233,100)

[1]	Losses on foreign exchange derivative contracts are included in Foreign exchange losses—net in the accompanying consolidated statements of income. Foreign exchange losses—net in the accompanying consolidated statements of income are also comprised of foreign exchange gains other than derivative contracts and foreign exchange gains (losses) related to the fair value option.

Business Segments (Narrative) (

Business Segments (Narrative) (Detail) - JPY (¥) ¥ in Billions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	¥ 1.9	¥ (0.5)
Operating Segments [Member] \| Customer Business [Member] \| Japanese Corporate & Investment Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	(13.8)	(18.6)
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	(10.4)	1.8
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	(13.4)	(18.7)
Operating Segments [Member] \| Global Markets Business Group [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	5.1	6.3
Business Segment, Other [Member]
Segment Reporting Information [Line Items]
Modification impact in operating profits (losses)	¥ 30.6	¥ 29.7

Business Segments (Financial In

Business Segments (Financial Information by Business Segment) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Business segment information
Net revenue		¥ 4,068,000	¥ 3,812,400	¥ 3,918,100
Net interest income		2,242,799	2,295,398	2,230,261
Operating expenses		2,893,000	2,740,100	2,717,500
Operating profit (loss)		1,175,000	1,072,300	1,200,600
BK and TB [Member]
Business segment information
Net revenue	[1]	1,878,100	1,861,000	2,029,900
Net interest income		930,300	1,145,200	1,119,700
Net fees		605,400	620,900	667,200
Other		342,400	94,900	243,000
Other than BK and TB [Member]
Business segment information
Net revenue		2,189,900	1,951,400	1,888,200
Operating Segments [Member] \| Customer Business [Member]
Business segment information
Net revenue		3,477,100	3,344,500	3,313,200
Operating expenses		2,510,100	2,380,200	2,356,000
Operating profit (loss)		967,000	964,300	957,200
Operating Segments [Member] \| Customer Business [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	1,507,000	1,498,000	1,532,000
Net interest income		721,800	717,000	701,100
Net fees		682,800	689,700	702,100
Other		102,400	91,300	128,800
Operating Segments [Member] \| Customer Business [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		1,970,100	1,846,500	1,781,200
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member]
Business segment information
Net revenue		1,501,600	1,522,000	1,582,500
Operating expenses		1,203,000	1,221,300	1,226,300
Operating profit (loss)		298,600	300,700	356,200
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	721,100	737,100	781,600
Net interest income		439,000	457,200	463,400
Net fees		248,000	243,800	246,400
Other		34,100	36,100	71,800
Operating Segments [Member] \| Customer Business [Member] \| Retail & Commercial Banking Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		780,500	784,900	800,900
Operating Segments [Member] \| Customer Business [Member] \| Japanese Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		551,100	545,200	523,200
Operating expenses		315,800	309,300	314,800
Operating profit (loss)		235,300	235,900	208,400
Operating Segments [Member] \| Customer Business [Member] \| Japanese Corporate & Investment Banking Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	420,700	415,000	433,000
Net interest income		164,200	150,200	148,900
Net fees		205,000	210,300	225,100
Other		51,500	54,500	59,000
Operating Segments [Member] \| Customer Business [Member] \| Japanese Corporate & Investment Banking Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		130,400	130,200	90,200
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member]
Business segment information
Net revenue		376,800	383,800	364,300
Operating expenses		247,800	241,500	226,700
Operating profit (loss)		129,000	142,300	137,600
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	270,500	254,000	236,900
Net interest income		115,200	110,900	92,100
Net fees		137,600	142,400	146,800
Other		17,700	700	(2,000)
Operating Segments [Member] \| Customer Business [Member] \| Global Corporate & Investment Banking Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		106,300	129,800	127,400
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member]
Business segment information
Net revenue		804,600	690,500	652,800
Operating expenses		571,800	483,500	468,800
Operating profit (loss)		232,800	207,000	184,000
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	100	(1,300)	(3,300)
Net interest income		900	(1,300)	(3,300)
Net fees
Other		(800)
Operating Segments [Member] \| Customer Business [Member] \| Global Commercial Banking Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		804,500	691,800	656,100
Operating Segments [Member] \| Customer Business [Member] \| Asset Management & Investor Services Business Group [Member]
Business segment information
Net revenue		243,000	203,000	190,400
Operating expenses		171,700	124,600	119,400
Operating profit (loss)		71,300	78,400	71,000
Operating Segments [Member] \| Customer Business [Member] \| Asset Management & Investor Services Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	94,600	93,200	83,800
Net interest income		2,500
Net fees		92,200	93,200	83,800
Other		(100)
Operating Segments [Member] \| Customer Business [Member] \| Asset Management & Investor Services Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		148,400	109,800	106,600
Operating Segments [Member] \| Global Markets Business Group [Member]
Business segment information
Net revenue		575,200	479,800	574,500
Operating expenses		232,200	223,500	228,700
Operating profit (loss)		343,000	256,300	345,800
Operating Segments [Member] \| Global Markets Business Group [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	358,400	303,900	369,300
Net interest income		123,100	227,800	235,100
Net fees		(12,600)	(13,900)	(12,000)
Other		247,900	90,000	146,200
Operating Segments [Member] \| Global Markets Business Group [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		216,800	175,900	205,200
Business Segment, Other [Member]
Business segment information
Net revenue		15,700	(11,900)	30,400
Operating expenses		150,700	136,400	132,800
Operating profit (loss)		(135,000)	(148,300)	(102,400)
Business Segment, Other [Member] \| BK and TB [Member]
Business segment information
Net revenue	[1]	12,700	59,100	128,600
Net interest income		85,400	200,400	183,500
Net fees		(64,800)	(54,900)	(22,900)
Other		(7,900)	(86,400)	(32,000)
Business Segment, Other [Member] \| Other than BK and TB [Member]
Business segment information
Net revenue		¥ 3,000	¥ (71,000)	¥ (98,200)

[1]	“BK and TB” is a sum of MUFG Bank on a stand-alone basis and Mitsubishi UFJ Trust and Banking on a stand-alone basis.

Business Segments (Reconciliati

Business Segments (Reconciliation of Operating Profit (Loss) from Segments to Consolidated Statements of Income) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	¥ 1,175,000	¥ 1,072,300	¥ 1,200,600
Reversal of (provision for) credit losses	(321,713)	(34,330)	240,847
Trading account profits (losses)—net	765,373	168,900	(73,114)
Foreign exchange gains (losses)—net	(281,790)	(95,987)	(49,561)
Equity in earnings of equity method investees—net	282,712	209,732	227,984
Impairment of goodwill	(383,810)
Impairment of intangible assets	(3,732)	(118,108)	(21,900)
Reversal of (provision for) off-balance sheet credit instruments	62,279	(38,463)	96,054
Income before income tax expense	433,220	870,842	1,661,819
Reconciliation [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating profit	1,175,000	1,072,000	1,201,000
Reversal of (provision for) credit losses	(322,000)	(34,000)	241,000
Trading account profits (losses)—net	920,000	182,000	(287,000)
Equity investment securities gains (losses)—net	(618,000)	(305,000)	215,000
Debt investment securities gains (losses)—net	(403,000)	(3,000)	71,000
Foreign exchange gains (losses)—net	(145,000)	47,000	7,000
Equity in earnings of equity method investees—net	283,000	210,000	228,000
Impairment of goodwill	(384,000)
Impairment of intangible assets	(4,000)	(118,000)	(22,000)
Reversal of (provision for) off-balance sheet credit instruments	62,000	(38,000)	96,000
Other—net	(131,000)	(142,000)	(88,000)
Income before income tax expense	¥ 433,000	¥ 871,000	¥ 1,662,000

Foreign Activities (Estimated F

Foreign Activities (Estimated Financial Information by Geographic Areas) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	¥ 5,802,838	¥ 5,408,623	¥ 5,194,107
Total expense	[2]	5,369,618	4,537,781	3,532,288
Income (loss) before income tax expense (benefit)		433,220	870,842	1,661,819
Net income (loss) attributable to Mitsubishi UFJ Financial Group		305,955	718,645	1,228,160
Total assets at end of fiscal year		331,753,283	305,228,899	300,570,312
Domestic, Japan [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	1,596,794	1,886,469	2,127,278
Total expense	[2]	2,565,895	2,204,147	1,687,344
Income (loss) before income tax expense (benefit)		(969,101)	(317,678)	439,934
Net income (loss) attributable to Mitsubishi UFJ Financial Group		(1,001,477)	(345,148)	140,091
Total assets at end of fiscal year		207,532,337	194,070,495	196,121,542
Foreign, United States of America [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	2,223,984	1,637,569	1,337,529
Total expense	[2]	1,051,164	1,012,978	843,885
Income (loss) before income tax expense (benefit)		1,172,820	624,591	493,644
Net income (loss) attributable to Mitsubishi UFJ Financial Group		1,113,913	573,698	447,887
Total assets at end of fiscal year		60,587,867	49,987,389	44,831,664
Foreign, Europe [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	89,412	222,267	506,211
Total expense	[2]	218,623	173,934	173,665
Income (loss) before income tax expense (benefit)		(129,211)	48,333	332,546
Net income (loss) attributable to Mitsubishi UFJ Financial Group		(140,372)	50,877	322,581
Total assets at end of fiscal year		19,099,410	21,535,278	22,342,574
Foreign, Asia / Oceania Excluding Japan [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1]	1,326,426	1,157,946	779,983
Total expense	[2]	1,174,200	892,729	651,125
Income (loss) before income tax expense (benefit)		152,226	265,217	128,858
Net income (loss) attributable to Mitsubishi UFJ Financial Group		142,568	214,582	92,016
Total assets at end of fiscal year		30,845,864	27,992,986	27,163,121
Foreign, Other Areas [Member]
Foreign Activities Disclosure [Line Items]
Total revenue	[1],[3]	566,222	504,372	443,106
Total expense	[2],[3]	359,736	253,993	176,269
Income (loss) before income tax expense (benefit)	[3]	206,486	250,379	266,837
Net income (loss) attributable to Mitsubishi UFJ Financial Group	[3]	191,323	224,636	225,585
Total assets at end of fiscal year	[3]	¥ 13,687,805	¥ 11,642,751	¥ 10,111,411

[1]	Total revenue is comprised of Interest income and Non-interest income.
[2]	Total expense is comprised of Interest expense, Provision for (reversal of) credit losses and Non-interest expense.
[3]	Other areas primarily include Canada, Latin America, the Caribbean and the Middle East.

Foreign Activities (Analysis of

Foreign Activities (Analysis of Certain Asset and Liability Accounts Related to Foreign Activities) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Foreign Activities Disclosure [Line Items]
Cash and due from banks		¥ 33,283,032	¥ 33,924,340
Interest-earning deposits in other banks		45,266,680	40,646,920
Cash, due from banks and interest-earning deposits in other banks		78,549,712	74,571,260	¥ 75,858,049
Trading account assets		47,504,058	40,576,618
Investment securities		43,751,242	44,938,004
Loans—net of unearned income, unamortized premiums and deferred loan fees	[1]	118,186,739	116,883,941
Deposits		203,954,528	199,280,789
Funds borrowed:
Call money, funds purchased		3,668,922	2,450,320
Payables under repurchase agreements		31,849,915	25,224,632
Payables under securities lending transactions		1,016,874	913,087
Other short-term borrowings		16,055,482	6,731,073
Long-term debt		27,926,763	27,990,543
Trading account liabilities		14,767,433	13,009,492
Foreign [Member]
Foreign Activities Disclosure [Line Items]
Cash and due from banks		971,870	828,839
Interest-earning deposits in other banks		12,662,558	8,453,191
Cash, due from banks and interest-earning deposits in other banks		13,634,428	9,282,030
Trading account assets		31,374,451	26,991,984
Investment securities		9,040,512	8,779,340
Loans—net of unearned income, unamortized premiums and deferred loan fees		53,079,542	51,678,674
Deposits		49,291,478	49,044,234
Funds borrowed:
Call money, funds purchased		276,040	67,246
Payables under repurchase agreements		13,476,026	9,459,547
Payables under securities lending transactions		176,998	47,886
Other short-term borrowings		4,733,138	5,107,832
Long-term debt		2,733,242	2,697,463
Total		21,395,444	17,379,974
Trading account liabilities		¥ 6,575,570	¥ 3,897,844

[1]	The above table includes loans held for sale of ¥291,794 million and ¥344,790 million at March 31, 2019 and 2020, respectively.

Fair Value (Assets and Liabilit

Fair Value (Assets and Liabilities Measured at Fair Value by Level on Recurring Basis) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020		Mar. 31, 2019
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	¥ 14,958,000		¥ 13,205,000
Investment securities, Available-for-sale debt securities		34,200,203		33,518,503
Equity securities		5,385,258		6,977,600
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	14,034,000		12,710,000
Obligation to return securities received as collateral	[4]	4,806,171		3,087,026
Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	10,847,000		10,109,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	10,205,000		9,896,000
Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	3,734,000		2,795,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	3,608,000		2,671,000
Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	236,000		188,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	277,000		183,000
Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	26,000		27,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	26,000		27,000
Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets	[1],[2],[3]	114,000		84,000
Liabilities:
Trading account liabilities, Trading derivative liabilities	[1],[2],[3]	95,000		69,000
Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		23,462,879		24,077,696
Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,952,820		2,226,566
Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,037,488		2,641,419
Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,272,826		1,130,731
Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,459,393		1,615,351
Commercial Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		382,255		130,955
Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,469,476		1,502,922
Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		163,066	[5]	192,863	[6]
Fair Value, Measurements, Recurring [Member]
Assets:
Trading account assets, Trading securities	[7]	32,479,566		27,331,733
Trading account assets, Trading derivative assets		14,957,574		13,204,485
Investment securities, Available-for-sale debt securities		34,200,203		33,518,503
Equity securities		4,808,281		6,386,363
Other	[8]	1,136,800		881,755
Assets at fair value, Total		87,582,424		81,322,839
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		559,382		162,910
Trading account liabilities, Trading derivative liabilities		14,208,051		12,846,582
Obligation to return securities received as collateral	[9]	4,806,171		3,087,026
Other	[10]	520,609		492,016
Liabilities at fair value, Total		20,094,213		16,588,534
Fair Value, Measurements, Recurring [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading securities	[7]	14,891,635		12,821,328
Trading account assets, Trading derivative assets		216,834		63,582
Investment securities, Available-for-sale debt securities		22,126,881		22,550,086
Equity securities		4,471,499		5,982,629
Other	[8]	1,054,186		807,193
Assets at fair value, Total		42,761,035		42,224,818
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		555,664		157,114
Trading account liabilities, Trading derivative liabilities		300,215		88,329
Obligation to return securities received as collateral	[9]	4,663,068		2,912,355
Liabilities at fair value, Total		5,518,947		3,157,798
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities	[7]	17,061,985		13,725,079
Trading account assets, Trading derivative assets		14,680,632		13,047,590
Investment securities, Available-for-sale debt securities		11,798,392		10,684,983
Equity securities		296,819		375,914
Other	[8]	45,913		42,184
Assets at fair value, Total		43,883,741		37,875,750
Liabilities:
Trading account liabilities, Trading securities sold, not yet purchased		3,718		5,796
Trading account liabilities, Trading derivative liabilities		13,851,205		12,701,110
Obligation to return securities received as collateral	[9]	143,103		174,671
Other	[10]	514,003		426,368
Liabilities at fair value, Total		14,512,029		13,307,945
Fair Value, Measurements, Recurring [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities	[7]	525,946		785,326
Trading account assets, Trading derivative assets		60,108		93,313
Investment securities, Available-for-sale debt securities		274,930		283,434
Equity securities		39,963		27,820
Other	[8]	36,701		32,378
Assets at fair value, Total		937,648		1,222,271
Liabilities:
Trading account liabilities, Trading derivative liabilities		56,631		57,143
Other	[10]	6,606		65,648
Liabilities at fair value, Total		63,237		122,791
Fair Value, Measurements, Recurring [Member] \| Interest Rate Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		10,846,607		10,108,456
Liabilities:
Trading account liabilities, Trading derivative liabilities		10,205,375		9,896,293
Fair Value, Measurements, Recurring [Member] \| Interest Rate Contracts [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		74,488		23,430
Liabilities:
Trading account liabilities, Trading derivative liabilities		153,098		35,179
Fair Value, Measurements, Recurring [Member] \| Interest Rate Contracts [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		10,758,790		10,067,719
Liabilities:
Trading account liabilities, Trading derivative liabilities		10,038,198		9,839,618
Fair Value, Measurements, Recurring [Member] \| Interest Rate Contracts [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		13,329		17,307
Liabilities:
Trading account liabilities, Trading derivative liabilities		14,079		21,496
Fair Value, Measurements, Recurring [Member] \| Foreign Exchange Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		3,733,683		2,795,091
Liabilities:
Trading account liabilities, Trading derivative liabilities		3,603,990		2,670,650
Fair Value, Measurements, Recurring [Member] \| Foreign Exchange Contracts [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		1,550		1,115
Liabilities:
Trading account liabilities, Trading derivative liabilities		3,360		2,633
Fair Value, Measurements, Recurring [Member] \| Foreign Exchange Contracts [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		3,723,087		2,771,115
Liabilities:
Trading account liabilities, Trading derivative liabilities		3,596,589		2,663,347
Fair Value, Measurements, Recurring [Member] \| Foreign Exchange Contracts [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		9,046		22,861
Liabilities:
Trading account liabilities, Trading derivative liabilities		4,041		4,670
Fair Value, Measurements, Recurring [Member] \| Equity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		235,572		187,703
Liabilities:
Trading account liabilities, Trading derivative liabilities		276,699		183,392
Fair Value, Measurements, Recurring [Member] \| Equity Contracts [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading derivative assets		140,796		39,037
Liabilities:
Trading account liabilities, Trading derivative liabilities		143,757		50,517
Fair Value, Measurements, Recurring [Member] \| Equity Contracts [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		87,285		139,666
Liabilities:
Trading account liabilities, Trading derivative liabilities		121,229		126,737
Fair Value, Measurements, Recurring [Member] \| Equity Contracts [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		7,491		9,000
Liabilities:
Trading account liabilities, Trading derivative liabilities		11,713		6,138
Fair Value, Measurements, Recurring [Member] \| Commodity Contracts [Member]
Assets:
Trading account assets, Trading derivative assets		27,502		29,411
Liabilities:
Trading account liabilities, Trading derivative liabilities		26,789		27,651
Fair Value, Measurements, Recurring [Member] \| Commodity Contracts [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		10		3,727
Liabilities:
Trading account liabilities, Trading derivative liabilities		14		2,916
Fair Value, Measurements, Recurring [Member] \| Commodity Contracts [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		27,492		25,684
Liabilities:
Trading account liabilities, Trading derivative liabilities		26,775		24,735
Fair Value, Measurements, Recurring [Member] \| Credit Derivatives [Member]
Assets:
Trading account assets, Trading derivative assets		114,210		83,824
Liabilities:
Trading account liabilities, Trading derivative liabilities		95,198		68,596
Fair Value, Measurements, Recurring [Member] \| Credit Derivatives [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading derivative assets		111,460		65,363
Liabilities:
Trading account liabilities, Trading derivative liabilities		95,175		68,492
Fair Value, Measurements, Recurring [Member] \| Credit Derivatives [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading derivative assets		2,750		18,461
Liabilities:
Trading account liabilities, Trading derivative liabilities		23		104
Fair Value, Measurements, Recurring [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		23,462,879		24,077,696
Fair Value, Measurements, Recurring [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member] \| Level 1 [Member]
Assets:
Investment securities, Available-for-sale debt securities		19,897,187		20,635,872
Fair Value, Measurements, Recurring [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,565,692		3,441,824
Fair Value, Measurements, Recurring [Member] \| Japanese Prefectural and Municipal Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,952,820		2,226,566
Fair Value, Measurements, Recurring [Member] \| Japanese Prefectural and Municipal Bonds [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,952,820		2,226,566
Fair Value, Measurements, Recurring [Member] \| Foreign Government and Official Institution Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		3,037,488		2,641,419
Fair Value, Measurements, Recurring [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 1 [Member]
Assets:
Investment securities, Available-for-sale debt securities		2,229,694		1,914,214
Fair Value, Measurements, Recurring [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		792,027		707,959
Fair Value, Measurements, Recurring [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		15,767		19,246
Fair Value, Measurements, Recurring [Member] \| Corporate Bonds [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,272,826		1,130,731
Fair Value, Measurements, Recurring [Member] \| Corporate Bonds [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,262,718		1,126,535
Fair Value, Measurements, Recurring [Member] \| Corporate Bonds [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		10,108		4,196
Fair Value, Measurements, Recurring [Member] \| Residential Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,459,393		1,615,351
Fair Value, Measurements, Recurring [Member] \| Residential Mortgage-backed Securities [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,459,378		1,615,336
Fair Value, Measurements, Recurring [Member] \| Residential Mortgage-backed Securities [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		15		15
Fair Value, Measurements, Recurring [Member] \| Commercial Mortgage-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		382,255		130,955
Fair Value, Measurements, Recurring [Member] \| Commercial Mortgage-backed Securities [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		380,278		128,917
Fair Value, Measurements, Recurring [Member] \| Commercial Mortgage-backed Securities [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,977		2,038
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,469,476		1,502,922
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		1,328,601		1,371,467
Fair Value, Measurements, Recurring [Member] \| Asset-backed Securities [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		140,875		131,455
Fair Value, Measurements, Recurring [Member] \| Other Debt Securities [Member]
Assets:
Investment securities, Available-for-sale debt securities		163,066		192,863
Fair Value, Measurements, Recurring [Member] \| Other Debt Securities [Member] \| Level 2 [Member]
Assets:
Investment securities, Available-for-sale debt securities		56,878		66,379
Fair Value, Measurements, Recurring [Member] \| Other Debt Securities [Member] \| Level 3 [Member]
Assets:
Investment securities, Available-for-sale debt securities		106,188		126,484
Fair Value, Measurements, Recurring [Member] \| Marketable Equity Securities [Member]
Assets:
Equity securities		4,768,318		6,358,543
Fair Value, Measurements, Recurring [Member] \| Marketable Equity Securities [Member] \| Level 1 [Member]
Assets:
Equity securities		4,471,499		5,982,629
Fair Value, Measurements, Recurring [Member] \| Marketable Equity Securities [Member] \| Level 2 [Member]
Assets:
Equity securities		296,819		375,914
Fair Value, Measurements, Recurring [Member] \| Nonmarketable Equity Securities [Member]
Assets:
Equity securities	[11]	39,963		27,820
Fair Value, Measurements, Recurring [Member] \| Nonmarketable Equity Securities [Member] \| Real Estate Funds [Member]
Assets:
Investments valued at net asset value		23,233		17,583
Unfunded commitments		1,494		2,054
Fair Value, Measurements, Recurring [Member] \| Nonmarketable Equity Securities [Member] \| Private Equity and Other Funds [Member]
Assets:
Investments valued at net asset value		18,862		9,921
Unfunded commitments
Fair Value, Measurements, Recurring [Member] \| Nonmarketable Equity Securities [Member] \| Level 3 [Member]
Assets:
Equity securities	[11]	39,963		27,820
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member]
Assets:
Trading account assets, Trading securities		4,155,167		2,629,975
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading securities		3,805,039		2,117,841
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Japanese National Government and Japanese Government Agency Bonds [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		350,128		512,134
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Japanese Prefectural and Municipal Bonds [Member]
Assets:
Trading account assets, Trading securities		93,479		117,799
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Japanese Prefectural and Municipal Bonds [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		93,479		117,799
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member]
Assets:
Trading account assets, Trading securities		9,775,245		9,719,185
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading securities		9,356,427		9,264,028
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		417,766		454,365
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities		1,052		792
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Corporate Bonds [Member]
Assets:
Trading account assets, Trading securities		2,537,714		3,234,969
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Corporate Bonds [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading securities		11
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Corporate Bonds [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		2,537,559		3,203,585
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Corporate Bonds [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities		144		31,384
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Residential Mortgage-backed Securities [Member]
Assets:
Trading account assets, Trading securities		9,037,539		7,073,534
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Residential Mortgage-backed Securities [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		9,037,539		7,038,353
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Residential Mortgage-backed Securities [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities				35,181
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Asset-backed Securities [Member]
Assets:
Trading account assets, Trading securities		1,006,815		880,952
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Asset-backed Securities [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		590,556		253,274
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Asset-backed Securities [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities		416,259		627,678
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Other Debt Securities [Member]
Assets:
Trading account assets, Trading securities		14,438		35,895
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Other Debt Securities [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		7,787		747
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Other Debt Securities [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities		6,651		35,148
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Commercial Paper [Member]
Assets:
Trading account assets, Trading securities		2,959,580		1,473,693
Fair Value, Measurements, Recurring [Member] \| Debt Securities [Member] \| Commercial Paper [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities		2,959,580		1,473,693
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member]
Assets:
Trading account assets, Trading securities	[12]	2,899,589		2,165,731
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member] \| Private Equity Funds [Member]
Assets:
Investments valued at net asset value		66,918		40,400
Unfunded commitments		102,743		94,483
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member] \| Level 1 [Member]
Assets:
Trading account assets, Trading securities	[12]	1,730,158		1,439,459
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member] \| Level 2 [Member]
Assets:
Trading account assets, Trading securities	[12]	1,067,591		671,129
Fair Value, Measurements, Recurring [Member] \| Equity Securities [Member] \| Level 3 [Member]
Assets:
Trading account assets, Trading securities	[12]	¥ 101,840		¥ 55,143

[1]	For more information about fair value measurement and assumptions used to measure the fair value of derivatives, see Note 31.
[2]	The fair value of derivative instruments is presented on a gross basis even when derivative instruments are subject to master netting agreements. Cash collateral payable and receivable associated with derivative instruments are not added to or netted against the fair value amounts.
[3]	This table does not include contracts with embedded derivatives for which the fair value option has been elected.
[4]	Certain reclassifications have been made to prior period to confirm to the current presentation.
[5]	Other debt securities in the table above mainly include ¥86,734 million of private placement debt conduit bonds.
[6]	Other debt securities in the table above mainly include ¥112,822 million of private placement debt conduit bonds.
[7]	Includes securities measured under the fair value option.
[8]	Mainly comprises securities received as collateral that may be sold or repledged under securities lending transactions, money in trust for segregating cash deposited by customers on security transactions and derivative assets designated as hedging instruments.
[9]	Included in Other liabilities.
[10]	Includes other short-term borrowings, long-term debt, bifurcated embedded derivatives carried at fair value and derivative liabilities designated as hedging instruments.
[11]	Excludes certain investments valued at net asset value of real estate funds and private equity and other funds whose fair values at March 31, 2019 were ¥17,583 million and ¥9,921 million, respectively, and those at March 31, 2020 were ¥23,233 million and ¥18,862 million, respectively. The amounts of unfunded commitments related to these real estate funds and private equity and other funds at March 31, 2019 were ¥2,054 million and nil, respectively, and those at March 31, 2020 were ¥1,494 million and nil, respectively.
[12]	Excludes certain investments valued at net asset value of private equity funds whose fair values were ¥40,400 million and ¥66,918 million at March 31, 2019 and 2020, respectively. The amounts of unfunded commitments related to these private equity funds were ¥94,483 million and ¥102,743 million at March 31, 2019 and 2020, respectively.

Fair Value (Reconciliation of A

Fair Value (Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Level 3 Inputs) (Detail) - Fair Value, Measurements, Recurring [Member] - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020		Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		¥ 1,165,128		¥ 1,227,291
Total gains (losses) for the period included in earnings, Assets		(27,838)		21,072
Total gains (losses) for the period included in other comprehensive income, Assets		607		(11,896)
Purchases, Assets		566,453		756,792
Issues, Assets		(1,449)		(682)
Sales, Assets		(246,068)		(318,008)
Settlements, Assets		(559,688)		(552,087)
Transfers into Level 3, Assets		108,198		51,098
Transfers out of Level 3, Assets		(124,326)		(8,452)
Level 3 assets, Ending balance		881,017		1,165,128
Change in unrealized gains (losses) included in earnings for assets still held at period end		(45,864)		(11,691)
Level 3 liabilities, Beginning balance		65,648		(25,528)
Total gains (losses) for the period included in earnings, Liabilities		(5,388)		(19,629)
Total gains (losses) for the period included in other comprehensive income, Liabilities		(414)		6,670
Purchases, Liabilities
Issues, Liabilities		2,258		16,759
Sales, Liabilities
Settlements, Liabilities		(21,133)		(18,499)
Transfers into Level 3, Liabilities		333		44,727
Transfers out of Level 3, Liabilities		(46,302)		35,230
Level 3 liabilities, Ending balance		6,606		65,648
Change in unrealized gains (losses) included in earnings for liabilities still held at period end		9,648		(10,778)
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 liabilities, Beginning balance		65,648		(25,528)
Total gains (losses) for the period included in earnings, Liabilities	[1]	(5,388)		(19,629)
Total gains (losses) for the period included in other comprehensive income, Liabilities		(414)		6,670
Issues, Liabilities		2,258		16,759
Settlements, Liabilities		(21,133)		(18,499)
Transfers into Level 3, Liabilities	[2]	333		44,727
Transfers out of Level 3, Liabilities	[2]	(46,302)		35,230
Level 3 liabilities, Ending balance		6,606		65,648
Change in unrealized gains (losses) included in earnings for liabilities still held at period end	[1]	9,648		(10,778)
Trading Account Assets, Trading Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance	[3]	785,326		827,493
Total gains (losses) for the period included in earnings, Assets	[3],[4]	(22,419)		23,848
Total gains (losses) for the period included in other comprehensive income, Assets	[3]			(1,341)
Purchases, Assets	[3]	227,656		454,048
Sales, Assets	[3]	(214,183)		(316,384)
Settlements, Assets	[3]	(225,980)		(213,944)
Transfers into Level 3, Assets	[3]	52,140		29,445
Transfers out of Level 3, Assets	[3]	(76,594)		(17,839)
Level 3 assets, Ending balance	[3]	525,946		785,326
Change in unrealized gains (losses) included in earnings for assets still held at period end	[3],[4]	(18,915)		18,299
Trading Account Assets, Trading Securities, Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		792		1,047
Total gains (losses) for the period included in earnings, Assets		589		863
Purchases, Assets		93,957		117,619
Sales, Assets		(92,748)		(118,377)
Settlements, Assets		(18)		(317)
Transfers out of Level 3, Assets		(1,520)		(43)
Level 3 assets, Ending balance		1,052		792
Change in unrealized gains (losses) included in earnings for assets still held at period end		(12)		5
Trading Account Assets, Trading Securities, Debt Securities [Member] \| Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		31,384		23,092
Total gains (losses) for the period included in earnings, Assets		(279)		611
Purchases, Assets		631		2,040
Sales, Assets		(3,937)		(1,798)
Settlements, Assets		(4,721)		(4,188)
Transfers into Level 3, Assets	[5]	24,882		29,423
Transfers out of Level 3, Assets	[5]	(47,816)		(17,796)
Level 3 assets, Ending balance		144		31,384
Change in unrealized gains (losses) included in earnings for assets still held at period end		(13)		286
Trading Account Assets, Trading Securities, Debt Securities [Member] \| Residential Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		35,181		41,141
Total gains (losses) for the period included in earnings, Assets		(695)		(282)
Sales, Assets		(23,837)
Settlements, Assets		(10,649)		(5,678)
Level 3 assets, Ending balance				35,181
Change in unrealized gains (losses) included in earnings for assets still held at period end				(289)
Trading Account Assets, Trading Securities, Debt Securities [Member] \| Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		627,678		684,637
Total gains (losses) for the period included in earnings, Assets		(23,494)		18,692
Total gains (losses) for the period included in other comprehensive income, Assets				(1,341)
Purchases, Assets		113,239		315,865
Sales, Assets		(93,655)		(195,851)
Settlements, Assets		(207,509)		(194,324)
Level 3 assets, Ending balance		416,259		627,678
Change in unrealized gains (losses) included in earnings for assets still held at period end		(18,815)		15,528
Trading Account Assets, Trading Securities, Debt Securities [Member] \| Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		35,148		33,450
Total gains (losses) for the period included in earnings, Assets		(1,239)		1,698
Transfers out of Level 3, Assets	[6]	(27,258)
Level 3 assets, Ending balance		6,651		35,148
Change in unrealized gains (losses) included in earnings for assets still held at period end		(387)		1,698
Trading Account Assets, Trading Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		55,143		44,126
Total gains (losses) for the period included in earnings, Assets		2,699		2,266
Purchases, Assets		19,829		18,524
Sales, Assets		(6)		(358)
Settlements, Assets		(3,083)		(9,437)
Transfers into Level 3, Assets		27,258	[6]	22
Level 3 assets, Ending balance		101,840		55,143
Change in unrealized gains (losses) included in earnings for assets still held at period end		312		1,071
Trading Account Assets, Trading Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		36,170		12,119
Total gains (losses) for the period included in earnings, Assets	[4]	4,503		(5,871)
Total gains (losses) for the period included in other comprehensive income, Assets		178		(744)
Purchases, Assets		714		787
Issues, Assets		(1,449)		(682)
Settlements, Assets		(33,463)		37
Transfers into Level 3, Assets		40,857		20,192
Transfers out of Level 3, Assets		(44,033)		10,332
Level 3 assets, Ending balance		3,477		36,170
Change in unrealized gains (losses) included in earnings for assets still held at period end	[4]	(16,742)		(25,241)
Trading Account Assets, Trading Derivatives [Member] \| Interest Rate Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		(4,189)		14,596
Total gains (losses) for the period included in earnings, Assets		21,290		12,397
Total gains (losses) for the period included in other comprehensive income, Assets		(24)		57
Issues, Assets				(119)
Settlements, Assets		(12,025)		(25,601)
Transfers into Level 3, Assets		2,254		(7,013)
Transfers out of Level 3, Assets		(8,056)		1,494
Level 3 assets, Ending balance		(750)		(4,189)
Change in unrealized gains (losses) included in earnings for assets still held at period end		8,046		11,507
Trading Account Assets, Trading Derivatives [Member] \| Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		18,191		6,736
Total gains (losses) for the period included in earnings, Assets		(21,429)		(10,997)
Total gains (losses) for the period included in other comprehensive income, Assets		89		(419)
Purchases, Assets		3		210
Settlements, Assets		4,858		(322)
Transfers into Level 3, Assets	[5]	35,444		27,230
Transfers out of Level 3, Assets		(32,151)		(4,247)
Level 3 assets, Ending balance		5,005		18,191
Change in unrealized gains (losses) included in earnings for assets still held at period end		(21,483)		(10,451)
Trading Account Assets, Trading Derivatives [Member] \| Equity Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		2,862		(10,685)
Total gains (losses) for the period included in earnings, Assets		5,188		18,756
Total gains (losses) for the period included in other comprehensive income, Assets		110		(374)
Purchases, Assets		96		13
Issues, Assets		(777)		(228)
Settlements, Assets		(11,305)		(17,680)
Transfers into Level 3, Assets		(41)		(25)
Transfers out of Level 3, Assets		(355)		13,085
Level 3 assets, Ending balance		(4,222)		2,862
Change in unrealized gains (losses) included in earnings for assets still held at period end		(2,846)		(752)
Trading Account Assets, Trading Derivatives [Member] \| Commodity Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		949		683
Total gains (losses) for the period included in earnings, Assets		(174)		32
Total gains (losses) for the period included in other comprehensive income, Assets		(1)		6
Purchases, Assets		615		564
Issues, Assets		(672)		(335)
Settlements, Assets				(1)
Level 3 assets, Ending balance		717		949
Change in unrealized gains (losses) included in earnings for assets still held at period end		(167)		795
Trading Account Assets, Trading Derivatives [Member] \| Credit Derivatives [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		18,357		789
Total gains (losses) for the period included in earnings, Assets		(372)		(26,059)
Total gains (losses) for the period included in other comprehensive income, Assets		4		(14)
Settlements, Assets		(14,991)		43,641
Transfers into Level 3, Assets		3,200
Transfers out of Level 3, Assets		(3,471)
Level 3 assets, Ending balance		2,727		18,357
Change in unrealized gains (losses) included in earnings for assets still held at period end		(292)		(26,340)
Investment Securities, Available-for-sale Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		283,434		350,660
Total gains (losses) for the period included in earnings, Assets	[7]	(2,402)		6,415
Total gains (losses) for the period included in other comprehensive income, Assets		804		(9,791)
Purchases, Assets		281,041		273,201
Sales, Assets		(24)
Settlements, Assets		(300,023)		(338,180)
Transfers into Level 3, Assets		15,201		1,456
Transfers out of Level 3, Assets		(3,101)		(327)
Level 3 assets, Ending balance		274,930		283,434
Change in unrealized gains (losses) included in earnings for assets still held at period end	[7]	(934)		(498)
Investment Securities, Available-for-sale Debt Securities [Member] \| Foreign Government and Official Institution Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		19,246		20,192
Total gains (losses) for the period included in other comprehensive income, Assets		1,625		(876)
Purchases, Assets		828		645
Settlements, Assets		(5,932)		(715)
Level 3 assets, Ending balance		15,767		19,246
Investment Securities, Available-for-sale Debt Securities [Member] \| Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		4,196		6,037
Total gains (losses) for the period included in earnings, Assets		(458)		(345)
Total gains (losses) for the period included in other comprehensive income, Assets		342		3
Purchases, Assets		663		3,450
Sales, Assets		(1)
Settlements, Assets		(6,734)		(6,078)
Transfers into Level 3, Assets	[5]	15,201		1,456
Transfers out of Level 3, Assets	[5]	(3,101)		(327)
Level 3 assets, Ending balance		10,108		4,196
Change in unrealized gains (losses) included in earnings for assets still held at period end		(934)		(498)
Investment Securities, Available-for-sale Debt Securities [Member] \| Residential Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		15		15
Level 3 assets, Ending balance		15		15
Investment Securities, Available-for-sale Debt Securities [Member] \| Commercial Mortgage-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		2,038		2,430
Total gains (losses) for the period included in other comprehensive income, Assets		125		(135)
Sales, Assets		(23)
Settlements, Assets		(163)		(257)
Level 3 assets, Ending balance		1,977		2,038
Investment Securities, Available-for-sale Debt Securities [Member] \| Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		131,455		161,172
Total gains (losses) for the period included in earnings, Assets		(1,944)		6,760
Total gains (losses) for the period included in other comprehensive income, Assets		(1,085)		(5,016)
Purchases, Assets		274,110		263,587
Settlements, Assets		(261,661)		(295,048)
Level 3 assets, Ending balance		140,875		131,455
Investment Securities, Available-for-sale Debt Securities [Member] \| Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		126,484		160,814
Total gains (losses) for the period included in other comprehensive income, Assets		(203)		(3,767)
Purchases, Assets		5,440		5,519
Settlements, Assets		(25,533)		(36,082)
Level 3 assets, Ending balance		106,188		126,484
Investment Securities, Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		27,820		28,359
Total gains (losses) for the period included in earnings, Assets	[7]	2,585		(2,298)
Purchases, Assets		12,718		3,795
Sales, Assets		(2,527)		(1,418)
Settlements, Assets		(35)
Transfers out of Level 3, Assets		(598)		(618)
Level 3 assets, Ending balance		39,963		27,820
Change in unrealized gains (losses) included in earnings for assets still held at period end	[7]	863		(3,060)
Investment Securities, Equity Securities [Member] \| Nonmarketable Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		27,820		28,359
Total gains (losses) for the period included in earnings, Assets		2,585		(2,298)
Purchases, Assets		12,718		3,795
Sales, Assets		(2,527)		(1,418)
Settlements, Assets		(35)
Transfers out of Level 3, Assets		(598)		(618)
Level 3 assets, Ending balance		39,963		27,820
Change in unrealized gains (losses) included in earnings for assets still held at period end		863		(3,060)
Others [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Level 3 assets, Beginning balance		32,378		8,660
Total gains (losses) for the period included in earnings, Assets	[8]	(10,105)		(1,022)
Total gains (losses) for the period included in other comprehensive income, Assets		(375)		(20)
Purchases, Assets		44,324		24,961
Sales, Assets		(29,334)		(206)
Settlements, Assets		(187)
Transfers into Level 3, Assets				5
Level 3 assets, Ending balance		36,701		32,378
Change in unrealized gains (losses) included in earnings for assets still held at period end	[8]	¥ (10,136)		¥ (1,191)

[1]	Included in Trading account profits (losses)—net.
[2]	Transfers into (out of) Level 3 for bifurcated embedded derivatives in Other were mainly caused by the decrease (increase) in the observability of the key inputs to the valuation models and a corresponding increase (decrease) in the significance of the unobservable inputs.
[3]	Includes Trading securities measured under the fair value option.
[4]	Included in Trading account profits (losses)—net and in Foreign exchange losses—net.
[5]	Transfers into (out of) Level 3 for Corporate bonds were caused by the decrease (increase) in liquidity or the availability of the quoted prices provided by third-party vendors. Transfers into (out of) Level 3 for Foreign exchange contracts—net were mainly caused by the valuation using certain unobservable input.
[6]	Transfers relate to the reclassification of certain securities.
[7]	Included in Investment securities gains (losses)—net.
[8]	Included in Fees and commissions income and Other non-interest income.

Fair Value (Quantitative Inform

Fair Value (Quantitative Information about Level 3 Fair Value Measurements) (Detail) - Fair Value, Measurements, Recurring [Member] - Level 3 [Member] ¥ in Millions		Mar. 31, 2020JPY (¥)yr	Mar. 31, 2019JPY (¥)yr
Interest Rate Contracts [Member] \| Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ (728)	¥ (4,189)
Interest Rate Contracts [Member] \| Option Model [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0
Interest Rate Contracts [Member] \| Option Model [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.120
Interest Rate Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rates [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.329	0.292
Interest Rate Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rates [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.625	0.513
Interest Rate Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rate and Foreign Exchange Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.167	0.228
Interest Rate Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rate and Foreign Exchange Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.600	0.600
Interest Rate Contracts [Member] \| Option Model [Member] \| Recovery Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.410
Interest Rate Contracts [Member] \| Option Model [Member] \| Recovery Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.480
Interest Rate Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0	0.110
Interest Rate Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		1	0.713
Foreign Exchange Contracts [Member] \| Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ 5,005	¥ 18,198
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.120
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rates [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.300	0.350
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rates [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.700	0.700
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rate and Foreign Exchange Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.158	0.148
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Correlation Between Interest Rate and Foreign Exchange Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.600	0.600
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Correlation Between Underlying Assets [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.600	0.650
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Recovery Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.410
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Recovery Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.480
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.075	0.097
Foreign Exchange Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.170	0.182
Equity Contracts [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ 6,166	¥ 5,878
Equity Contracts [Member] \| Discounted Cash Flow [Member] \| Term of Litigation [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs \| yr			1
Equity Contracts [Member] \| Discounted Cash Flow [Member] \| Term of Litigation [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs \| yr		0.1
Equity Contracts [Member] \| Discounted Cash Flow [Member] \| Term of Litigation [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs \| yr		1.1
Equity Contracts [Member] \| Option Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Fair value	[1]	¥ (10,038)	¥ (2,727)
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Underlying Assets [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.517
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Underlying Assets [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs			0.820
Equity Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.242	0.210
Equity Contracts [Member] \| Option Model [Member] \| Volatility [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.320	0.300
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Foreign Exchange Rate and Equity [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		(0.584)	0.070
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Foreign Exchange Rate and Equity [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.569	0.641
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Equities [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.195	0.216
Equity Contracts [Member] \| Option Model [Member] \| Correlation Between Equities [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading derivatives—net, Significant unobservable inputs		0.810	0.803
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 15,767	¥ 19,246
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.002	0
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.013	0.004
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.004	0.003
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.550	0.600
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.900	0.700
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.699	0.667
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.100
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.080
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		10
Foreign Government and Official Institution Bonds [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.099	0.100
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 92,025	¥ 109,213
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.012	0.012
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.053	0.053
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Probability of Default [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.050	0.050
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Recovery Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.600	0.600
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Recovery Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.760	0.760
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Recovery Rate [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.682	0.672
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Loan Price [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.905
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Loan Price [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			1.003
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Discounted Cash Flow [Member] \| Loan Price [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]		0.954
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1],[3]	¥ 389,170	¥ 587,577
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Asset Correlations [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.010	0.100
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Asset Correlations [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.010	0.100
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Discount Factor [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.011	0.010
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Discount Factor [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.014	0.012
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Discount Factor [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.014	0.012
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Prepayment Rate [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.210	0.227
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Prepayment Rate [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.210	0.227
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0	0
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.990	0.901
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Probability of Default [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[4]
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Recovery Rate [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[3]	0.578	0.643
Residential Mortgage-backed Securities, Commercial Mortgage-backed Securities and Asset-backed Securities [Member] \| Internal Model [Member] \| Recovery Rate [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2],[3]	0.578	0.643
Other Debt Securities [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 6,651	¥ 35,148	[3]
Other Debt Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.024
Other Debt Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.010
Other Debt Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs			0.024
Other Debt Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.024	0.013
Other Debt Securities [Member] \| Return on Equity Method [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 86,734	¥ 112,822
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0	0
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.250	0.250
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Probability of Default [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.003	0.003
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.600	0.400
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.900	0.900
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Recovery Rate [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.798	0.780
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Minimum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.080	0.080
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Maximum [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		0.100	0.100
Other Debt Securities [Member] \| Return on Equity Method [Member] \| Market-required Return on Capital [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	0.094	0.095
Equity Securities [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Fair value	[1]	¥ 27,144
Equity Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs		1
Equity Securities [Member] \| Discounted Cash Flow [Member] \| Liquidity Premium [Member] \| Weighted Average [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading securities and Investment securities, Significant unobservable inputs	[2]	1

[1]	The fair value as of March 31, 2019 and 2020 excludes the fair value of investments valued using vendor prices.
[2]	Weighted averages are calculated by weighing each input by the relative fair value of the respective financial instruments.
[3]	For further detail of Internal model, refer to the last paragraph of “Trading Account Assets and Liabilities—Trading Account Securities.”
[4]	See “Probability of default” in “Sensitivity to and range of unobservable inputs.”

Fair Value (Carrying Value of A

Fair Value (Carrying Value of Assets Measured at Fair Value on Nonrecurring Basis by Level) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Goodwill		¥ 517,626	¥ 433,891	¥ 441,334
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	18,176	84,987
Loans		272,029	262,438
Loans, Loans held for sale		73,573	77,506
Loans, Collateral dependent loans		198,456	184,932
Premises and equipment		37,109	35,352
Intangible assets		453	19,635
Goodwill		283,032
Other assets		91,624	196,058
Other assets, Investments in equity method investees	[1]	78,926	186,284
Other assets, Other		12,698	9,774
Assets at fair value, Total		702,423	598,470
Fair Value, Measurements, Nonrecurring [Member] \| Private Equity Funds [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities valued at net asset value		12,935	8,866
Unfunded commitments related to investment securities valued at net asset value		17,216	12,242
Fair Value, Measurements, Nonrecurring [Member] \| Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans		2,548	2,656
Loans, Collateral dependent loans		2,548	2,656
Other assets		73,015	136,528
Other assets, Investments in equity method investees	[1]	73,015	136,528
Assets at fair value, Total		75,563	139,184
Fair Value, Measurements, Nonrecurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	15,473	80,779
Loans		9,199	9,104
Loans, Collateral dependent loans		9,199	9,104
Other assets			49,756
Other assets, Investments in equity method investees	[1]		49,756
Assets at fair value, Total		24,672	139,639
Fair Value, Measurements, Nonrecurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investment securities	[1],[2]	2,703	4,208
Loans		260,282	250,678
Loans, Loans held for sale		73,573	77,506
Loans, Collateral dependent loans		186,709	173,172
Premises and equipment		37,109	35,352
Intangible assets		453	19,635
Goodwill		283,032
Other assets		18,609	9,774
Other assets, Investments in equity method investees	[1]	5,911
Other assets, Other		12,698	9,774
Assets at fair value, Total		¥ 602,188	¥ 319,647

[1]	Excludes certain investments valued at net asset value of ¥8,866 million and ¥12,935 million at March 31, 2019 and 2020, respectively. The unfunded commitments related to these investments are ¥12,242 million and ¥17,216 million at March 31, 2019 and 2020, respectively. These investments are in private equity funds.
[2]	Includes certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including impairment and observable price change for nonmarketable equity securities measured under the measurement alternative.

Fair Value (Losses (Gains) Reco

Fair Value (Losses (Gains) Recorded as a Result of Changes in Fair Value Measured on a Nonrecurring Basis) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 495,484	¥ 188,378
Investment Securities [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	(2,171)	(50,785)
Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	47,359	30,153
Loans [Member] \| Loans Held for Sale [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	4,688	4,762
Loans [Member] \| Collateral Dependent Loans [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	42,671	25,391
Premises and Equipment [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	16,517	31,345
Intangible Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	3,732	118,108
Goodwill [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	383,810
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	46,237	59,557
Other Assets [Member] \| Investments in Equity Method Investees [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	21,672	51,645
Other Assets [Member] \| Other [Member]
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Losses (gains) on change in fair value	¥ 24,565	¥ 7,912

Fair Value (Gains (Losses) Rela

Fair Value (Gains (Losses) Related to Instruments for which Fair Value Option was Elected) (Detail) - JPY (¥) ¥ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Financial Liabilities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		¥ (2,893)	¥ (13,881)	¥ 13,456
Financial Liabilities [Member] \| Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(2,893)	(13,881)	13,456
Financial Liabilities [Member] \| Other Short-term Borrowings [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	5,194	(5,559)	5,902
Financial Liabilities [Member] \| Other Short-term Borrowings [Member] \| Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	5,194	(5,559)	5,902
Financial Liabilities [Member] \| Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(8,087)	(8,322)	7,554
Financial Liabilities [Member] \| Long-term Debt [Member] \| Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[1]	(8,087)	(8,322)	7,554
Financial Assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		241,815	395,530	(415,749)
Financial Assets [Member] \| Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		837,832	208,952	(148,242)
Financial Assets [Member] \| Foreign Exchange Gains (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value		(596,017)	186,578	(267,507)
Financial Assets [Member] \| Trading Account Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	241,815	395,530	(415,749)
Financial Assets [Member] \| Trading Account Securities [Member] \| Trading Account Profits (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	837,832	208,952	(148,242)
Financial Assets [Member] \| Trading Account Securities [Member] \| Foreign Exchange Gains (Losses) [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	[2]	¥ (596,017)	¥ 186,578	¥ (267,507)

[1]	Change in value attributable to the instrument-specific credit risk related to those financial liabilities are not material.
[2]	Excludes Danamon’s equity securities. See Note 2 for reference.

Fair Value (Differences between

Fair Value (Differences between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	¥ 319,149	¥ 358,730
Fair value, Financial liabilities	304,067	325,808
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	(15,082)	(32,922)
Long-term Debt [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Remaining aggregate contractual amounts outstanding, Financial liabilities	319,149	358,730
Fair value, Financial liabilities	304,067	325,808
Fair value over (under) remaining aggregate contractual amounts outstanding, Financial liabilities	¥ (15,082)	¥ (32,922)

Fair Value (Summary of Carrying

Fair Value (Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments Not Carried at Fair Value on Recurring Basis on Balance Sheets by Level) (Detail) - JPY (¥) ¥ in Millions		Mar. 31, 2020	Mar. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying amounts of investments in equity method investees		¥ 2,421,154	¥ 2,487,389
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,283,000	33,924,000
Interest-earning deposits in other banks		45,267,000	40,647,000
Call loans and funds sold		1,169,000	1,110,000
Receivables under resale agreements		23,996,000	10,975,000
Receivables under securities borrowing transactions		3,444,000	2,759,000
Investment securities		4,166,000	4,442,000
Loans, net of allowance for credit losses	[1]	117,373,000	116,213,000
Other financial assets	[2]	8,494,000	7,455,000
Deposits, Non-interest-bearing		33,382,000	30,443,000
Deposits, Interest-bearing		170,574,000	168,846,000
Total deposits		203,956,000	199,289,000
Call money and funds purchased		3,669,000	2,450,000
Payables under repurchase agreements		31,850,000	25,225,000
Payables under securities lending transactions		1,017,000	913,000
Due to trust account and other short-term borrowings		19,057,000	9,177,000
Long-term debt		27,772,000	27,790,000
Other financial liabilities		7,139,000	6,781,000
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,283,000	33,924,000
Interest-earning deposits in other banks		45,267,000	40,647,000
Call loans and funds sold		1,169,000	1,110,000
Receivables under resale agreements		23,996,000	10,975,000
Receivables under securities borrowing transactions		3,444,000	2,759,000
Investment securities		4,178,000	4,453,000
Loans, net of allowance for credit losses	[1]	118,497,000	117,064,000
Other financial assets	[2]	8,494,000	7,455,000
Deposits, Non-interest-bearing		33,382,000	30,443,000
Deposits, Interest-bearing		170,631,000	168,899,000
Total deposits		204,013,000	199,342,000
Call money and funds purchased		3,669,000	2,450,000
Payables under repurchase agreements		31,850,000	25,225,000
Payables under securities lending transactions		1,017,000	913,000
Due to trust account and other short-term borrowings		19,057,000	9,177,000
Long-term debt		27,941,000	27,968,000
Other financial liabilities		7,139,000	6,781,000
Estimated Fair Value [Member] \| Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks		33,283,000	33,924,000
Investment securities		1,134,000	1,197,000
Loans, net of allowance for credit losses	[1]	3,000	3,000
Estimated Fair Value [Member] \| Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest-earning deposits in other banks		45,267,000	40,647,000
Call loans and funds sold		1,169,000	1,110,000
Receivables under resale agreements		23,996,000	10,975,000
Receivables under securities borrowing transactions		3,444,000	2,759,000
Investment securities		1,042,000	1,135,000
Loans, net of allowance for credit losses	[1]	259,000	247,000
Other financial assets	[2]	8,494,000	7,455,000
Deposits, Non-interest-bearing		33,382,000	30,443,000
Deposits, Interest-bearing		170,631,000	168,899,000
Total deposits		204,013,000	199,342,000
Call money and funds purchased		3,669,000	2,450,000
Payables under repurchase agreements		31,850,000	25,225,000
Payables under securities lending transactions		1,017,000	913,000
Due to trust account and other short-term borrowings		19,057,000	9,177,000
Long-term debt		27,941,000	27,968,000
Other financial liabilities		7,139,000	6,781,000
Estimated Fair Value [Member] \| Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities		2,002,000	2,121,000
Loans, net of allowance for credit losses	[1]	¥ 118,235,000	¥ 116,814,000

[1]	Includes loans held for sale and collateral dependent loans measured at fair value on a nonrecurring basis. Refer to “Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis” for the details of the level classification.
[2]	Excludes investments in equity method investees of ¥2,487 billion and ¥2,421 billion at March 31, 2019 and 2020, respectively.

Parent Company Only Financial_3

Parent Company Only Financial Information (Narrative) (Detail) - BK and TB [Member] - JPY (¥) ¥ in Billions	Mar. 31, 2020	Mar. 31, 2019
Companies Act [Member]
Parent Company Only Financial Information [Line Items]
Unrestricted amount of retained earnings that are in excess of the level required under the statutory reserve requirements	¥ 5,247	¥ 6,077
Banking Law and Related Regulations [Member]
Parent Company Only Financial Information [Line Items]
Percentage limitation of loans or credits to the parent company over the banking subsidiary's consolidated total capital	15.00%
Restricted amount of net assets of consolidated subsidiaries as to payment of cash dividends and loans to the parent company	¥ 5,696	¥ 5,160

Parent Company Only Financial_4

Parent Company Only Financial Information (Condensed Balance Sheets) (Detail) - JPY (¥) ¥ in Millions	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Assets:
Total assets	¥ 331,753,283	¥ 305,228,899	¥ 300,570,312
Liabilities and shareholder's equity:
Total liabilities	316,008,767	289,244,151
Total shareholders' equity	15,016,487	15,199,548
Total liabilities and equity	331,753,283	305,228,899
MUFG [Member]
Assets:
Cash and interest-earning deposits with banking subsidiaries	185,668	203,713
Investments in subsidiaries and affiliated companies	16,116,568	16,668,232
Investments in subsidiaries and affiliated companies, Banking subsidiaries	12,361,190	12,754,653
Investments in subsidiaries and affiliated companies, Non-banking subsidiaries and affiliated companies	3,755,378	3,913,579
Loans to subsidiaries	8,746,231	7,199,052
Loans to subsidiaries, Banking subsidiaries	8,222,278	6,864,309
Loans to subsidiaries, Non-banking subsidiaries	523,953	334,743
Other assets	241,441	223,725
Total assets	25,289,908	24,294,722
Liabilities and shareholder's equity:
Short-term borrowings from banking subsidiaries	1,255,991	1,425,682
Long-term debt from non-banking subsidiaries and affiliated companies	30,686	277,138
Long-term debt	8,758,646	7,187,469
Other liabilities	228,098	204,885
Total liabilities	10,273,421	9,095,174
Total shareholders' equity	15,016,487	15,199,548
Total liabilities and equity	¥ 25,289,908	¥ 24,294,722

Parent Company Only Financial_5

Parent Company Only Financial Information (Condensed Statements of Income) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income:
Foreign exchange gains (losses)—net	¥ (281,790)	¥ (95,987)	¥ (49,561)
Trading account losses—net	765,373	168,900	(73,114)
Expense:
Operating expenses	2,893,000	2,740,100	2,717,500
Income before income tax expense	433,220	870,842	1,661,819
Income tax expense (benefit)	114,505	133,237	407,823
Net income attributable to Mitsubishi UFJ Financial Group	305,955	718,645	1,228,160
MUFG [Member]
Income:
Dividends from subsidiaries and affiliated companies	376,376	306,879	576,332
Dividends from subsidiaries and affiliated companies, Banking subsidiaries	277,472	207,161	487,491
Dividends from subsidiaries and affiliated companies, Non-banking subsidiaries and affiliated companies	98,904	99,718	88,841
Management fees from subsidiaries	33,543	28,305	26,073
Interest income from subsidiaries	174,500	127,117	80,670
Foreign exchange gains (losses)—net	4,834	(20,598)	24,726
Trading account losses—net	(37,272)	(8,078)	(26,749)
Gains on sales of investment in subsidiaries and affiliated companies	67,406	252,253
Other income	14,968	3,199	1,508
Total income	634,355	689,077	682,560
Expense:
Operating expenses	30,431	28,168	26,016
Interest expense to subsidiaries and affiliated companies	26,244	34,594	31,426
Interest expense	155,774	108,756	65,068
Other expense	15,024	1,657	1,791
Total expense	227,473	173,175	124,301
Equity in undistributed net income (loss) of subsidiaries and affiliated companies—net	(108,069)	194,390	672,421
Income before income tax expense	298,813	710,292	1,230,680
Income tax expense (benefit)	(7,142)	(8,353)	2,520
Net income attributable to Mitsubishi UFJ Financial Group	¥ 305,955	¥ 718,645	¥ 1,228,160

Parent Company Only Financial_6

Parent Company Only Financial Information (Condensed Statements of Cash Flows) (Detail) - JPY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income attributable to Mitsubishi UFJ Financial Group	¥ 305,955	¥ 718,645	¥ 1,228,160
Net cash provided by (used in) operating activities	(1,355,900)	228,334	(563,836)
Cash flows from investing activities:
Other—net	(68,611)	(49,590)	(72,765)
Net cash provided by (used in) investing activities	(18,085,443)	(4,632,028)	3,244,016
Cash flows from financing activities:
Proceeds from issuance of long-term debt	4,999,531	5,020,636	6,671,031
Repayment of long-term debt	(4,983,073)	(4,236,887)	(5,485,894)
Proceeds from sales of treasury stock	1,235	2,322	1,316
Payments for acquisition of treasury stock	(50,028)	(159,962)	(201,102)
Other—net	358,922	197,673	(87,067)
Net cash provided by financing activities	23,782,518	3,063,331	9,362,206
Net increase (decrease) in cash and cash equivalents	3,978,523	(1,296,388)	11,854,237
Cash and cash equivalents at beginning of fiscal year	74,577,068	75,873,456	64,019,219
Cash and cash equivalents at end of fiscal year	78,555,591	74,577,068	75,873,456
MUFG [Member]
Cash flows from operating activities:
Net income attributable to Mitsubishi UFJ Financial Group	305,955	718,645	1,228,160
Adjustments and other	(1,704)	(351,775)	(799,571)
Net cash provided by (used in) operating activities	304,251	366,870	428,589
Cash flows from investing activities:
Proceeds from redemption of other investment securities	240,000
Proceeds from sales of investment in subsidiaries and affiliated companies	135,581	455,605
Purchase of equity investment in subsidiaries and an affiliated company		(18,346)	(53,000)
Net increase in loans to subsidiaries	(1,547,178)	(2,112,711)	(1,682,576)
Other—net	(12,572)	(9,009)	(4,361)
Net cash provided by (used in) investing activities	(1,184,169)	(1,684,461)	(1,739,937)
Cash flows from financing activities:
Net decrease in short-term borrowings from subsidiaries	(164,272)	(194,300)	(41,402)
Proceeds from issuance of long-term debt	1,844,488	2,043,677	1,872,986
Repayment of long-term debt	(214,994)	(314)	(112,184)
Repayment of long-term debt to affiliated companies	(241,000)	(500)	(1,090)
Proceeds from sales of treasury stock	2	3	1
Payments for acquisition of treasury stock	(50,022)	(150,277)	(200,038)
Dividends paid	(304,538)	(276,279)	(241,067)
Other—net	(7,791)	(15,490)	(9,677)
Net cash provided by financing activities	861,873	1,406,520	1,267,529
Net increase (decrease) in cash and cash equivalents	(18,045)	88,929	(43,819)
Cash and cash equivalents at beginning of fiscal year	203,713	114,784	158,603
Cash and cash equivalents at end of fiscal year	¥ 185,668	¥ 203,713	¥ 114,784

Subsequent Events (Narrative) (

Subsequent Events (Narrative) (Detail) - Subsequent Event [Member] - Common Stock [Member] ¥ / shares in Units, ¥ in Millions	Jun. 29, 2020JPY (¥)¥ / shares
Subsequent Event [Line Items]
Dividends payable, amount per share \| ¥ / shares	¥ 12.5
Dividends payable, total amount \| ¥	¥ 160,919
Dividends payable, date to be paid	Jun. 30, 2020
Dividends payable, date of record	Mar. 31, 2020