Collateralized transactions - Securities transferred in repurchase agreements and securities lending transactions (Parenthetical) (Detail) - JPY (¥) ¥ in Billions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Collateralized Transactions | ||
| U.S. government sponsored agency mortgage pass through securities and collateralized mortgage obligations | ¥ 2,877 | ¥ 3,586 |