Quarterly Statement Of Cash Flows
| Concept | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                28,448,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                14,163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,843,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -1,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -5,098,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                35,837,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,960,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Proceeds from sale of property, plant and equipment | — | 
                                                540,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                283,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -41,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                3,647,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                406,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -63,152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                99,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,582,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -31,097,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of bonds | — | 
                                                29,881,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,949,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | — | 
                                                -10,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -10,649,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -659,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -654,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                105,851,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,712,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                1,047,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,224,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                79,583,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,156,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                115,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                35,859,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,703,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |