Notes - Segment Information, Etc.
| Concept | 2024-01-01 to 2024-06-30 | 2024-01-01 to 2024-06-30 | 2024-01-01 to 2024-06-30 | 2024-01-01 to 2024-06-30 | 2024-01-01 to 2024-06-30 | 2024-01-01 to 2024-06-30 | 2023-01-01 to 2023-06-30 | 2023-01-01 to 2023-06-30 | 2023-01-01 to 2023-06-30 | 2023-01-01 to 2023-06-30 | 2023-01-01 to 2023-06-30 | 2023-01-01 to 2023-06-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                8,504,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,504,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,966,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,191,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,346,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,478,514,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                527,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,018,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,931,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,478,514,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,027,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                835,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,027,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -168,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                168,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                34,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |