Related party transactions - Disclosure Of Key Management Compensation (Detail) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Disclosure of key management personnel compensation [Line Items] | |||
| Base compensation | ¥ 1,425 | ¥ 1,107 | ¥ 1,226 |
| Bonus | 1,607 | 1,054 | 397 |
| Share compensation | 1,940 | 1,862 | 808 |
| Total | ¥ 4,972 | ¥ 4,024 | ¥ 2,430 |