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 | 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 | 
                                                18,109,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,685,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,080,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,109,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,344,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,245,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,054,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,054,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,979,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,829,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,701,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                470,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,172,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,172,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,060,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                835,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,060,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                83,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |