v3.26.1
Subsidiaries and Investments Accounted for the Equity Method - Summary of General Information (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of subsidiaries [line items]        
Accumulated amount attributable to non-controlling interests ¥ 36,582 ¥ 123,836    
Profit for the year attributable to non-controlling interests in PayPay Bank Corporation 2,776 2,987 ¥ 2,520  
Total assets 5,176,012 4,042,105    
Total liabilities 4,745,251 3,818,374    
Total shareholders' equity 430,761 223,731 191,251 ¥ 191,540
Total revenue 380,662 299,078 254,611  
Profit for the year 117,810 39,157 (830)  
Total comprehensive income (loss) for the year, net of tax 114,400 35,693 (1,950)  
Net cash provided by operating activities 375,297 155,849 49,975  
Net cash used in investing activities (628,827) (319,977) (273,383)  
Net cash provided by (used in) financing activities 246,752 (210,325) 107,930  
Effect of exchange rate changes on cash and cash equivalents 50 (59) 488  
Decrease in cash and cash equivalents ¥ (6,728) ¥ (374,512) ¥ (114,990)  
PayPay Bank Corporation        
Disclosure of subsidiaries [line items]        
Ownership of the non-controlling interests 24.00% 94.00% 94.00%  
Accumulated amount attributable to non-controlling interests ¥ 33,249 ¥ 119,427    
Profit for the year attributable to non-controlling interests in PayPay Bank Corporation 2,745 5,052 ¥ 5,037  
Total assets 3,155,448 2,179,939    
Total liabilities 3,019,577 2,048,079    
Total shareholders' equity 135,871 131,860    
Total revenue 65,745 49,658 43,322  
Profit for the year 10,844 5,368 5,483  
Total comprehensive income (loss) for the year, net of tax 7,444 1,915 4,351  
Net cash provided by operating activities 592,220 82,238 38,709  
Net cash used in investing activities (618,910) (102,940) (238,302)  
Net cash provided by (used in) financing activities 104,578 (3,645) 77,686  
Effect of exchange rate changes on cash and cash equivalents   (11) 392  
Decrease in cash and cash equivalents ¥ 77,888 ¥ (24,358) ¥ (121,515)