Notes - Segment Information, Etc.
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                184,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,386,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,571,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,571,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,425,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,629,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,629,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                -34,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -32,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |