v3.26.1
Structured Entities - Interests in Unconsolidated Structured Entities and Maximum Exposure to Loss (Detail) - JPY (¥)
¥ in Millions
Mar. 31, 2026
Mar. 31, 2025
Interests in unconsolidated structured entities recognized in:    
Trading assets ¥ 6,890,217 ¥ 6,176,613
Financial assets at fair value through profit or loss 2,705,113 2,902,969
Investment securities 33,537,857 33,546,133
Loans and advances 130,516,241 125,190,819
Securitisation [Member]    
Interests in unconsolidated structured entities recognized in:    
Trading assets 51,141 40,107
Financial assets at fair value through profit or loss 504 324
Investment securities 74,589 98,029
Loans and advances 5,915,861 5,072,479
Total 6,042,095 5,210,939
Maximum exposure to loss from interests in unconsolidated structured entities 8,853,302 7,185,520
Investment funds [Member]    
Interests in unconsolidated structured entities recognized in:    
Trading assets 72,438 42,540
Financial assets at fair value through profit or loss 1,639,384 1,875,755
Investment securities 63,861 29,957
Loans and advances 130,132  
Total 1,905,815 1,948,252
Maximum exposure to loss from interests in unconsolidated structured entities 1,908,111 1,950,118
Structured finance [member]    
Interests in unconsolidated structured entities recognized in:    
Financial assets at fair value through profit or loss 65,792 53,777
Loans and advances 12,195,975 11,348,699
Total 12,261,767 11,402,476
Maximum exposure to loss from interests in unconsolidated structured entities 14,387,112 13,329,381
Others [Member]    
Interests in unconsolidated structured entities recognized in:    
Trading assets 2,301  
Loans and advances 980,808 838,609
Total 983,109 838,609
Maximum exposure to loss from interests in unconsolidated structured entities 1,464,499 1,073,814
Unconsolidated structured entities [Member]    
Interests in unconsolidated structured entities recognized in:    
Trading assets 125,880 82,647
Financial assets at fair value through profit or loss 1,705,680 1,929,856
Investment securities 138,450 127,986
Loans and advances 19,222,776 17,259,787
Total 21,192,786 19,400,276
Maximum exposure to loss from interests in unconsolidated structured entities ¥ 26,613,024 ¥ 23,538,833