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 | 
                                                11,520,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,075,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,312,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,419,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,862,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,207,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,663,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,046,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                827,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                370,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,536,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,534,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                986,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,009,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,794,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                228,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,420,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                264,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,228,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                206,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                192,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                628,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                381,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,351,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,869,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                259,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |