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 | 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 | 
                                                38,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,873,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,792,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,956,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,956,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,565,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                3,715,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,705,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,622,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                8,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,044,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,366,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,065,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |