Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                3,688,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,061,626,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                666,958,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,061,626,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                632,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,022,531,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                386,818,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,022,531,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                651,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                651,768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -651,768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,498,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -633,966,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                633,966,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                3,679,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,237,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,046,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,998,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,783,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |