Crypto assets held (Details) - JPY (¥) |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Apr. 01, 2023 |
[1] | ||||
| Crypto Assets [Abstract] | |||||||
| Crypto assets held, current | ¥ 44,680,000,000 | ¥ 44,207,000,000 | [1] | ¥ 18,969,000,000 | |||
| Crypto assets held, non-current | 43,000,000 | 0 | [1] | ¥ 43,000,000 | |||
| Crypto assets held, impairment | ¥ 0 | ¥ 0 | |||||
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