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 | 
                                                2,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,044,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,044,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,613,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,086,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                321,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                56,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,214,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |