Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                730,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                561,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,822,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,822,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                529,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                581,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,756,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,756,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                672,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                503,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -69,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,073,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -81,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |