v3.26.1
Related Party Transactions - Summary of Significant Balances and Transactions Between Group and Related Parties Settlement and Other Operating Transactions (Details) - JPY (¥)
¥ in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of transactions between related parties [line items]      
Profit or loss ¥ 117,810 ¥ 39,157 ¥ (830)
Parent Company | SoftBank Corp. | Granting PayPay Points to Users on Behalf of SoftBank Corp.      
Disclosure of transactions between related parties [line items]      
Profit or loss 0 0 0
Settlement amounts 55,699 36,385  
Settlement amounts     19,888
Outstanding receivable balances 5,200 4,546 3,350
Outstanding payable balances (459) (259) (184)
Parent Company | SoftBank Corp. | Securitization Transaction Involving Receivables      
Disclosure of transactions between related parties [line items]      
Profit or loss 0 0 0
Settlement amounts 62,916 72,914  
Settlement amounts     51,543
Outstanding receivable balances 139,630 123,050 80,278
Parent Company | LY Corporation | Rendering Settlement Service      
Disclosure of transactions between related parties [line items]      
Profit or loss 21,947 18,253 15,701
Settlement amounts 2,097,781 1,825,130 1,768,955
Outstanding payable balances (167,738) (148,646) (138,749)
Parent Company | LY Corporation | Bearing Expenses of User Incentives      
Disclosure of transactions between related parties [line items]      
Profit or loss 2,897 2,814 6,573
Settlement amounts 0 0 0
Outstanding payable balances (358) (474) (844)
Subsidiary of Parent Company | SB Payment Service Corporation | Rendering Settlement Service      
Disclosure of transactions between related parties [line items]      
Profit or loss 0 0 0
Settlement amounts 1,011,159 721,382 419,058
Outstanding payable balances (53,688) (39,036) (22,240)
Subsidiary of Parent Company | SB Payment Service Corporation | Utilizing Settlement System For Merchants      
Disclosure of transactions between related parties [line items]      
Profit or loss 8,697 8,806 10,245
Settlement amounts 591,330 615,825  
Settlement amounts     912,322
Outstanding receivable balances 29,368 32,275 36,144
Outstanding payable balances ¥ (1,963) ¥ (3,531) ¥ (4,471)