v3.26.1
Revenue - Summary of Disaggregation of Revenue from Contracts with Customers by type of Service (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers ¥ 251,041 ¥ 203,595 ¥ 174,127
Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 220,770 176,597 149,310
Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 30,271 26,998 24,817
PayPay Settlement Services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 245,799 193,237 151,673
PayPay Settlement Services | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 245,799 193,237 151,673
PayPay Settlement Services | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Credit Payment Settlement Services and Acquiring Services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 46,019 37,192 31,917
Credit Payment Settlement Services and Acquiring Services | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 46,019 37,192 31,917
Credit Payment Settlement Services and Acquiring Services | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Debit Payment Settlement Services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 5,468 5,077 4,731
Debit Payment Settlement Services | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Debit Payment Settlement Services | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 5,468 5,077 4,731
Payment settlement services deduction      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers (101,771) (78,470) (53,840)
Payment settlement services deduction | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers (100,358) (77,161) (52,669)
Payment settlement services deduction | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers (1,413) (1,309) (1,171)
Payment Settlement Services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 195,515 157,036 134,481
Payment Settlement Services | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 191,460 153,268 130,921
Payment Settlement Services | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 4,055 3,768 3,560
Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 24,706 22,269 20,867
Financial Service | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 0 0 0
Financial Service | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 24,706 22,269 20,867
Other      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 30,820 24,290 18,779
Other | Payment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 29,310 23,329 18,389
Other | Financial Service      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers ¥ 1,510 ¥ 961 ¥ 390