v3.26.1
Gains on Investment Securities and Dividends - Gains on Investment Securities and Dividends (Detail) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Net Investment Income [Line Items]      
Net gains on investment securities [1] ¥ 127,024 ¥ 11,825 ¥ 30,731
Dividends income 1,924 2,499 2,292
Gains on investment securities and dividends ¥ 128,948 ¥ 14,324 ¥ 33,023
[1] Unrealized changes in fair value of investments in equity securities have been included in “Net gains on investment securities.”