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 | 
                                                98,172,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,567,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,628,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,832,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,832,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,181,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,264,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                1,294,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,177,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,883,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,177,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,279,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,388,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,279,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                1,241,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,051,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,406,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |