Cover Page
 12 Months Ended
Mar. 31, 2022
shares
Document Information [Line Items]  
Document Type 20-F
Document Registration Statement false
Document Annual Report true
Current Fiscal Year End Date --03-31
Document Period End Date Mar. 31, 2022
Document Fiscal Year Focus 2022
Document Transition Report false
Document Shell Company Report false
Entity File Number 000-54189
Entity Registrant Name MITSUBISHI UFJ FINANCIAL GROUP, INC.
Entity Address, Address Line One 7-1, Marunouchi 2-chome
Entity Address, Address Line Two Chiyoda-ku
Entity Address, City or Town Tokyo
Entity Address, Postal Zip Code 100-8330
Entity Incorporation, State or Country Code M0
Entity Address, Country JP
Entity Common Stock, Shares Outstanding 13,281,995,120
Entity Well-known Seasoned Issuer Yes
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Amendment Flag false
Document Fiscal Period Focus FY
Entity Central Index Key 0000067088
Business Contact  
Document Information [Line Items]  
Entity Address, Address Line One 4-5, Marunouchi 1-chome
Entity Address, Address Line Two Chiyoda-ku
Entity Address, City or Town Tokyo
Entity Address, Postal Zip Code 100-8212
Contact Personnel Name Masahisa Takahashi
City Area Code 81-3
Local Phone Number 3240-8111
Entity Address, Country JP
Common stock  
Document Information [Line Items]  
Security 12(b) Title Common stock, without par value
Security Exchange Name NYSE
No Trading Symbol Flag true
American Depositary Shares  
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