Consolidated 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 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                15,127,678,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,631,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                324,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                375,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -3,616,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,970,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -287,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -283,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                11,547,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,753,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -4,298,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,037,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                7,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -3,152,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,668,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                1,801,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,587,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -183,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -4,019,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                681,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -1,867,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,793,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid to non-controlling interests | — | 
                                                -1,542,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,487,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -616,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -584,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -6,512,866,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,120,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                713,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                432,649,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                2,595,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,602,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                24,447,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                21,852,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,454,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |