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 | — | 
                                                6,455,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                619,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                130,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -319,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -294,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -1,028,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -107,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                5,239,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                784,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of investment securities | — | 
                                                -850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,818,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                182,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -3,419,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,831,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from short-term borrowings | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of short-term borrowings | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,078,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -5,246,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,110,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -954,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -701,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -5,656,653,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,101,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                146,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -3,689,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,137,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                7,159,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,849,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,598,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |