Notes - Segment Information, Etc.
| 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 | 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 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | |||||||||||||
| Segment information | |||||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | |||||||||||||
| Sales | |||||||||||||
| Revenues from external customers | 
                                                5,134,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,406,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,566,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,134,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,608,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,608,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,173,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                370,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -55,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -78,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | |||||||||||||
| Depreciation | 
                                                147,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |