Quarterly Consolidated Statement Of Cash Flows
| Concept | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                8,469,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,242,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                27,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -4,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -2,185,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,385,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                7,010,584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,479,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -864,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -501,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | 
                                                139,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | 
                                                -142,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -367,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -617,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -2,595,622,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,233,826,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | 
                                                -3,642,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,312,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -3,302,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -3,047,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -6,971,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,385,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                8,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -2,547,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,137,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                10,346,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                12,894,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,031,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |