Notes - Segment Information, Etc.
| Concept | 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 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                9,722,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,722,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,088,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,740,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,892,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,384,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,954,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,658,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,319,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,658,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                58,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -58,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -53,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                138,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                151,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                151,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                46,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |