v3.25.2
Related parties - Listing of Consolidated Subsidiaries (Details) - subsidiary
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disclosure of subsidiaries [line items]    
Number of subsidiary 6 0
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%  
M1 Co G.K.    
Disclosure of subsidiaries [line items]    
Percentage of voting rights held by the Company  100.00%  
Next Finance Tech Group    
Disclosure of subsidiaries [line items]    
Percentage of voting rights held by the Company  100.00%  
Next Finance Tech Digital Assets Co., Ltd.    
Disclosure of subsidiaries [line items]    
Percentage of voting rights held by the Company  100.00%  
Next Finance Tech International Co., Ltd.    
Disclosure of subsidiaries [line items]    
Percentage of voting rights held by the Company  100.00%