v3.26.1
Business Combinations - Additional Information (Details) - JPY (¥)
¥ in Millions
12 Months Ended
Apr. 11, 2025
Apr. 01, 2025
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Apr. 28, 2025
Disclosure of detailed information about business combination [line items]            
Changes due to business combinations of entities under common control - PayPay Securities Corporation and PayPay Bank Corporation     ¥ (123,185)      
Investments accounted for using equity method     12,762 ¥ 1,012    
Payments for the purchase of the equity interest of subsidiaries, through business combinations of entities under common control     130,185 ¥ 0 ¥ 0  
Non-controlling Interests            
Disclosure of detailed information about business combination [line items]            
Changes due to business combinations of entities under common control - PayPay Securities Corporation and PayPay Bank Corporation     (86,358)      
Share Premium            
Disclosure of detailed information about business combination [line items]            
Changes due to business combinations of entities under common control - PayPay Securities Corporation and PayPay Bank Corporation     (36,827)      
PayPay Securities Corporation            
Disclosure of detailed information about business combination [line items]            
Percentage of shares acquired   31.00%        
Percentage of shares held   75.20%        
Percentage of shares held prior to acquisition   35.00%        
Cash consideration paid   ¥ 12,807        
PayPay Bank Corporation            
Disclosure of detailed information about business combination [line items]            
Percentage of shares acquired 47.10%          
Percentage of shares held           75.50%
Cash consideration paid ¥ 117,378          
PayPay Securities Corporation and PayPay Bank Corporation            
Disclosure of detailed information about business combination [line items]            
Payments for the purchase of the equity interest of subsidiaries, through business combinations of entities under common control     ¥ 130,185