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Related parties - Listing of Consolidated Subsidiaries (Details) - subsidiary |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2026 | Mar. 31, 2026 | Mar. 31, 2025
Disclosure of subsidiaries [line items] |  |  |
Number of subsidiary |  | 18 | 6
Coincheck, Inc. |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company |  | 100.00% |
CCG Administrative Services, Inc. |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company |  | 100.00% |
Next Finance Tech Co., LTD. |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company |  | 100.00% |
Aplo SAS |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company |  | 100.00% |
3iQ Digital Holdings, Inc. |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company |  | 99.80% |
3iQ Corp |  |  |
Disclosure of subsidiaries [line items] |  |  |
Percentage of voting rights held by the Company | 99.80% | 99.80% |

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- Definition The proportion of the voting rights in a subsidiary held by the entity. [Refer: Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2025-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2025-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2025-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2025-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2025-01-01 -Paragraph 19B -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2025-03-27 + Details
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