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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
                                                    
                                                
                                             | 
                                                4,546,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,546,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                695,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,851,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,209,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,209,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                524,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,684,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |