Related parties - Compensation for the Company’s key management personnel (Details) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Related Party [Abstract] | |||
| Short-term employee benefits | ¥ 353 | ¥ 291 | ¥ 66 |
| Termination benefits | 282 | 0 | 0 |
| Share-based payments | 283 | 0 | 0 |
| Total | ¥ 918 | ¥ 291 | ¥ 66 |
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- Definition Related Party [Abstract] No definition available.
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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