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 | 
                                                395,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                395,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                227,169,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                168,416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,681,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                155,026,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,454,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -26,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |