Notes - Segment Information, Etc.
| Concept | 2024-07-01 to 2024-12-31 | 2024-07-01 to 2024-12-31 | 2024-07-01 to 2024-12-31 | 2024-07-01 to 2024-12-31 | 2024-07-01 to 2024-12-31 | 2023-07-01 to 2023-12-31 | 2023-07-01 to 2023-12-31 | 2023-07-01 to 2023-12-31 | 2023-07-01 to 2023-12-31 | 2023-07-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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
                                                    
                                                
                                             | 
                                                4,851,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,259,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,408,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,259,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,010,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,372,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,382,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,382,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                -603,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                870,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                870,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -870,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |