Parent Company Only Financial Information (Condensed Balance Sheets) (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Assets:      
Total assets ¥ 367,650,018 ¥ 353,824,625 ¥ 331,753,283
Liabilities and Shareholders’ equity:      
Total liabilities 351,353,496 337,580,071  
Total shareholders’ equity 15,605,068 15,660,949  
Total liabilities and equity 367,650,018 353,824,625  
MUFG:      
Assets:      
Cash and interest-earning deposits with banking subsidiaries 231,389 229,380  
Investments in subsidiaries and affiliated companies 16,504,756 16,658,522  
Banking subsidiaries 11,731,745 12,793,367  
Non-banking subsidiaries and affiliated companies 4,773,011 3,865,155  
Loans to subsidiaries 10,062,030 9,208,439  
Loans to subsidiaries, Banking subsidiaries 9,516,847 8,690,696  
Loans to subsidiaries, Non-banking subsidiaries 545,183 517,743  
Other assets 266,773 197,231  
Total assets 27,064,948 26,293,572  
Liabilities and Shareholders’ equity:      
Short-term borrowings from banking subsidiaries 1,146,147 1,206,694  
Long-term debt from non-banking subsidiaries and affiliated companies 24,535 15,897  
Long-term debt 10,055,876 9,226,046  
Other liabilities 233,322 183,986  
Total liabilities 11,459,880 10,632,623  
Total shareholders’ equity 15,605,068 15,660,949  
Total liabilities and equity ¥ 27,064,948 ¥ 26,293,572