v3.26.1
Variable Interest Entities (Assets and Liabilities of Consolidated Variable Interest Entities) (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Variable Interest Entity [Line Items]      
Total assets ¥ 425,581,652 ¥ 405,940,211 ¥ 397,820,570
Cash and due from banks 4,366,847 4,591,186  
Interest-earning deposits in other banks 86,003,138 104,706,928  
Trading account assets 83,921,911 59,417,128  
Investment securities 53,819,507 58,318,547  
Total liabilities 404,741,595 386,690,473  
Deposits 260,755,340 249,415,006  
Other short-term borrowings 12,859,910 24,636,926  
Long-term debt 21,884,349 21,022,407  
Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 24,081,764 22,488,218  
Cash and due from banks 13,913 8,641  
Interest-earning deposits in other banks 103,720 22,136  
Trading account assets 1,498,332 1,379,227  
Investment securities 2,570,969 2,478,281  
Loans   16,709,249  
All other assets 2,141,709 1,890,684  
Total liabilities 633,914 588,974  
Deposits 0 0  
Other short-term borrowings 51,524 42,029  
Long-term debt 395,011 370,917  
All other liabilities 187,379 176,028  
Consolidated VIEs | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 24,081,764    
Cash and due from banks 13,913    
Interest-earning deposits in other banks 103,720    
Trading account assets 1,498,332    
Investment securities 2,570,969    
Loans 17,753,121    
All other assets 2,141,709    
Consolidated VIEs | Total consolidated assets before elimination      
Variable Interest Entity [Line Items]      
Total assets   24,730,095  
Cash and due from banks   73,928  
Interest-earning deposits in other banks   80,130  
Trading account assets   1,459,896  
Investment securities   3,027,881  
Loans   18,025,453  
All other assets   2,062,807  
Total liabilities 25,517,967 23,879,692  
Deposits 1,599,365 1,715,116  
Other short-term borrowings 9,633,725 8,517,549  
Long-term debt 12,512,798 12,181,891  
All other liabilities 1,772,079 1,465,136  
Consolidated VIEs | Total consolidated assets before elimination | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 26,737,970    
Cash and due from banks 78,537    
Interest-earning deposits in other banks 250,077    
Trading account assets 1,862,472    
Investment securities 3,050,969    
Loans 19,132,257    
All other assets 2,363,658    
Consolidated VIEs | Total consolidated assets before elimination | Asset-backed conduits      
Variable Interest Entity [Line Items]      
Total assets 8,922,649 7,814,826  
Cash and due from banks   57,908  
Interest-earning deposits in other banks   11,001  
Trading account assets   87,129  
Investment securities   1,094,698  
Loans   6,531,210  
All other assets   32,880  
Total liabilities 8,817,422 7,756,296  
Deposits 0 0  
Other short-term borrowings 6,938,430 5,928,518  
Long-term debt 1,451,724 1,453,912  
All other liabilities 427,268 373,866  
Consolidated VIEs | Total consolidated assets before elimination | Asset-backed conduits | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Cash and due from banks 53,316    
Interest-earning deposits in other banks 75,805    
Trading account assets 117,138    
Investment securities 1,177,647    
Loans 7,407,690    
All other assets 91,053    
Consolidated VIEs | Total consolidated assets before elimination | Investment funds      
Variable Interest Entity [Line Items]      
Total assets   2,255,725  
Cash and due from banks   8,623  
Interest-earning deposits in other banks   48,396  
Trading account assets   420,259  
Investment securities   90,580  
Loans   0  
All other assets   1,687,867  
Total liabilities 1,689,048 1,581,746  
Deposits 0 0  
Other short-term borrowings 1,672,537 1,533,915  
Long-term debt 10,409 9,148  
All other liabilities 6,102 38,683  
Consolidated VIEs | Total consolidated assets before elimination | Investment funds | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 2,594,045    
Cash and due from banks 13,852    
Interest-earning deposits in other banks 126,008    
Trading account assets 486,434    
Investment securities 155,850    
Loans 8,596    
All other assets 1,803,305    
Consolidated VIEs | Total consolidated assets before elimination | Special purpose entities created for structured financing      
Variable Interest Entity [Line Items]      
Total assets   313,346  
Cash and due from banks   0  
Interest-earning deposits in other banks   14,509  
Trading account assets   0  
Investment securities   0  
Loans   158,337  
All other assets   140,500  
Total liabilities 252,679 170,180  
Deposits 0 0  
Other short-term borrowings 2,942 0  
Long-term debt 161,464 131,594  
All other liabilities 88,273 38,586  
Consolidated VIEs | Total consolidated assets before elimination | Special purpose entities created for structured financing | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 455,483    
Cash and due from banks 0    
Interest-earning deposits in other banks 36,871    
Trading account assets 0    
Investment securities 0    
Loans 154,176    
All other assets 264,436    
Consolidated VIEs | Total consolidated assets before elimination | Repackaged instruments      
Variable Interest Entity [Line Items]      
Total assets   377,261  
Cash and due from banks   5,500  
Interest-earning deposits in other banks   0  
Trading account assets   203,970  
Investment securities   142,283  
Loans   15,000  
All other assets   10,508  
Total liabilities 549,130 340,464  
Deposits 0 0  
Other short-term borrowings 0 0  
Long-term debt 259,523 222,733  
All other liabilities 289,607 117,731  
Consolidated VIEs | Total consolidated assets before elimination | Repackaged instruments | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 624,213    
Cash and due from banks 10,610    
Interest-earning deposits in other banks 0    
Trading account assets 407,037    
Investment securities 186,498    
Loans 15,000    
All other assets 5,068    
Consolidated VIEs | Total consolidated assets before elimination | Securitization of the MUFG Group’s assets      
Variable Interest Entity [Line Items]      
Total assets   10,113,082  
Cash and due from banks   0  
Interest-earning deposits in other banks   174  
Trading account assets   0  
Investment securities   0  
Loans   10,100,566  
All other assets   12,342  
Total liabilities 10,436,676 10,123,630  
Deposits 0 0  
Other short-term borrowings 65,272 0  
Long-term debt 10,366,557 10,120,219  
All other liabilities 4,847 3,411  
Consolidated VIEs | Total consolidated assets before elimination | Securitization of the MUFG Group’s assets | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 10,426,490    
Cash and due from banks 0    
Interest-earning deposits in other banks 5,214    
Trading account assets 0    
Investment securities 0    
Loans 10,408,497    
All other assets 12,779    
Consolidated VIEs | Total consolidated assets before elimination | Trust arrangements      
Variable Interest Entity [Line Items]      
Total assets   3,618,564  
Cash and due from banks   0  
Interest-earning deposits in other banks   0  
Trading account assets   740,514  
Investment securities   1,661,663  
Loans   1,216,343  
All other assets   44  
Total liabilities 3,469,081 3,618,686  
Deposits 1,599,365 1,715,116  
Other short-term borrowings 954,117 1,054,466  
Long-term debt 0 0  
All other liabilities 915,599 849,104  
Consolidated VIEs | Total consolidated assets before elimination | Trust arrangements | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 3,470,784    
Cash and due from banks 0    
Interest-earning deposits in other banks 0    
Trading account assets 841,838    
Investment securities 1,492,127    
Loans 1,135,013    
All other assets 1,806    
Consolidated VIEs | Total consolidated assets before elimination | Other      
Variable Interest Entity [Line Items]      
Total assets   237,291  
Cash and due from banks   1,897  
Interest-earning deposits in other banks   6,050  
Trading account assets   8,024  
Investment securities   38,657  
Loans   3,997  
All other assets   178,666  
Total liabilities 303,931 288,690  
Deposits 0 0  
Other short-term borrowings 427 650  
Long-term debt 263,121 244,285  
All other liabilities 40,383 43,755  
Consolidated VIEs | Total consolidated assets before elimination | Other | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets 244,306    
Cash and due from banks 759    
Interest-earning deposits in other banks 6,179    
Trading account assets 10,025    
Investment securities 38,847    
Loans 3,285    
All other assets 185,211    
Consolidated VIEs | The amounts eliminated in consolidation      
Variable Interest Entity [Line Items]      
Total assets   (2,241,877)  
Cash and due from banks   (65,287)  
Interest-earning deposits in other banks   (57,994)  
Trading account assets   (80,669)  
Investment securities   (549,600)  
Loans   (1,316,204)  
All other assets   (172,123)  
Total liabilities (17,735,513) (16,567,315)  
Deposits (274) (651)  
Other short-term borrowings (4,862,028) (4,084,517)  
Long-term debt (12,040,212) (11,771,730)  
All other liabilities (832,999) (710,417)  
Consolidated VIEs | The amounts eliminated in consolidation | Pro forma, before transfer of assets and liabilities      
Variable Interest Entity [Line Items]      
Total assets (2,656,206)    
Cash and due from banks (64,624)    
Interest-earning deposits in other banks (146,357)    
Trading account assets (364,140)    
Investment securities (480,000)    
Loans (1,379,136)    
All other assets (221,949)    
Consolidated VIEs | The amount of liabilities with recourse to the general credit of the MUFG Group      
Variable Interest Entity [Line Items]      
Total liabilities (7,148,540) (6,723,403)  
Deposits (1,599,091) (1,714,465)  
Other short-term borrowings (4,720,173) (4,391,003)  
Long-term debt (77,575) (39,244)  
All other liabilities ¥ (751,701) ¥ (578,691)