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 | 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 | 
                                                803,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,508,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,311,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,311,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                978,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,398,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,376,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,377,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |