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 | 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 | 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 | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,428,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,794,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,613,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,524,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,401,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,960,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,876,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                1,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                529,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                433,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                913,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                913,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                7,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,021,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,357,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,517,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,352,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,352,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                689,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |