v3.25.2
Reverse Recapitalization and Acquisitions of subsidiaries - Narrative (Details)
12 Months Ended
Mar. 14, 2025
JPY (¥)
shares
Mar. 31, 2025
JPY (¥)
shares
Mar. 31, 2024
JPY (¥)
Apr. 01, 2023
JPY (¥)
Mar. 14, 2025
$ / shares
Disclosure of detailed information about business combination [line items]          
Net proceeds from reverse recapitalization   ¥ 205,000,000 ¥ 0 ¥ 0  
Cash-trust and cash, net of redemptions   4,780,000,000      
Cash paid for the non-redemption and share forward agreement   1,593,000,000      
Transaction costs and professional fees   ¥ 2,982,000,000      
Warrants issued (in shares) | shares   4,900,000      
Professional services   ¥ 4,595,000,000      
Listing expense   13,714,000,000      
Share listing and associated expenses   ¥ 18,309,000,000      
Next Finance Tech Co, Ltd.          
Disclosure of detailed information about business combination [line items]          
Percentage acquired 100.00%        
Number of shares issued (in shares) | shares 1,111,450        
Share price (in USD per share) | $ / shares         $ 6.53
Acquisition-related costs ¥ 11,000,000        
Goodwill expected to be deductible for tax purposes ¥ 0