Reverse Recapitalization and Acquisitions of subsidiaries - Reconciliation of reverse recapitalization to the consolidated statements of cash flows and equity (Details) - JPY (¥) ¥ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Apr. 01, 2023 |
|
| Business Combinations And Reverse Recapitalization [Abstract] | |||
| Cash-trust and cash, net of redemptions | ¥ 4,780 | ||
| Less: Ghisallo Non-Redemption Agreement | (1,593) | ||
| Less: transaction costs and professional fees, paid at closing | (2,982) | ||
| Proceeds from Reverse Recapitalization, net of Non-Redemption Agreement, transaction costs and professional fees | 205 | ¥ 0 | ¥ 0 |
| Less: warrant liabilities | (1,837) | ||
| Less: promissory note - related party | (128) | ||
| Less: excise tax payable | (305) | ||
| Less: income tax payable | (60) | ||
| Less: accounts payable and accrued expenses | (17) | ||
| Less: Other financial liabilities | (189) | ||
| Add: Listing expense | 13,714 | ||
| Issuance of shares in Reverse Recapitalization, net | ¥ 11,383 | ||