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 | — | 
                                                177,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                228,928,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                1,257,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                958,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -7,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,622,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -19,006,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,512,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                152,289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,328,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Net cash provided by (used in) investing activities | — | 
                                                -234,065,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -69,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                40,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -49,880,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -56,091,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of bonds | — | 
                                                18,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | — | 
                                                -50,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -30,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -3,109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -1,474,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -89,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -48,867,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -93,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -130,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                94,372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                225,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |