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 | 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 | 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 | 
                                                83,880,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,689,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,808,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,663,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,897,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,187,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,808,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,945,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,756,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,509,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,509,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                981,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,509,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |