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 | 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 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||
| Segment information | ||||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                1,116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,326,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,442,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,187,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,403,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,724,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,724,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,590,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                604,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                554,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                560,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                369,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                604,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |