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 | 
                                                91,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,441,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,235,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,060,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                142,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                468,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                467,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |