Insurance contracts in the financial services segment - Summary of Amounts payable on demand (Detail) - JPY (¥) ¥ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Disclosure of types of insurance contract [Abstract] | ||
| Amounts payable on demand | ¥ 13,214,887 | ¥ 12,580,674 |
| Carrying amount | ¥ 12,642,981 | ¥ 12,870,195 |