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 | 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 | 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 | 
                                                3,096,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                470,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,054,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,532,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,944,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                995,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                487,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,020,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,827,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,561,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                482,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                839,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||||||
| Depreciation | 
                                                85,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,206,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                723,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                674,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                53,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,816,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,952,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                812,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -37,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                957,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                172,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |