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, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                9,983,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,649,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,168,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,092,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,021,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,287,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,856,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,360,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                6,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -22,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,543,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -22,543,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,637,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |