Semi-Annual Consolidated Statement Of Comprehensive Income
| Concept | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of comprehensive income | ||||||||||
| Statement of comprehensive income | ||||||||||
| Profit (loss) | 
                                                4,038,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,993,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,038,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,038,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,038,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,902,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,902,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,201,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,902,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,902,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | 
                                                103,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                70,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign currency translation adjustment | — | 
                                                5,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | 
                                                -6,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                26,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | — | 
                                                101,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                97,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income | — | 
                                                6,095,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                5,299,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | 
                                                6,095,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                5,299,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |