v3.26.1
Loans and Allowance for Credit Losses (Loans Purchased with Credit Deterioration ) (Details)
¥ in Millions
12 Months Ended
Mar. 31, 2026
JPY (¥)
Credit Loss [Abstract]  
Purchase price ¥ 136,121
Allowance for credit losses at acquisition 14,067
Non-credit discount (2,721)
Principal balance ¥ 147,467