Notes - Segment Information, Etc.
| Concept | 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 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                19,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,956,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,956,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,565,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,301,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,156,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,854,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,156,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                1,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                725,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,586,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,861,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                8,452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,065,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,160,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                854,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,211,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |