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 | 
                                                169,420,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                276,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                276,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                106,792,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                293,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                293,556,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                23,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                1,266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,850,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -269,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -181,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                914,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,395,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                913,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                583,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                351,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,339,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |