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 | 
                                                302,805,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                340,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                340,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,873,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,052,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                280,161,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,103,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,925,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,813,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,925,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,472,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                2,760,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,170,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                780,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,751,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                8,932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,056,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,131,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,647,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,536,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                674,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,321,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |