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 | 
                                                8,893,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,234,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,604,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,543,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,919,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,999,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,567,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                715,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |