Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                36,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                368,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,047,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,708,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                366,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                1,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,697,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,697,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,607,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,605,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                142,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,607,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |