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 | 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 and profit (loss) for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                2,094,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                132,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,962,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,094,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,330,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,330,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,266,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |