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 | 
                                                22,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,343,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,870,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,343,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,721,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,721,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,963,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,731,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,038,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,038,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,038,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                980,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |