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 | 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 | 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 | 
                                                51,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,012,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,797,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,813,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,399,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,419,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,399,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,622,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                4,330,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                642,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,167,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,312,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                520,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                593,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,220,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                532,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,203,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                3,773,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                289,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                322,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |