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 | 
                                                56,046,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,406,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                184,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                184,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,709,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,709,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                341,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                183,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                738,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,512,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,589,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,512,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                826,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,843,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,858,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,858,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,739,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,366,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |