v3.26.1
Transfer of Financial Assets - Additional Information (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Installment loans ¥ 1,048,527 ¥ 782,613 ¥ 795,328
Gain (losses) on sale from securitization and loan sales ¥ 20,026 ¥ 17,057 ¥ 14,622