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 | 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 | 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 | 
                                                65,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,863,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,944,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                469,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,093,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,414,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,966,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,085,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                582,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,093,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,561,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                482,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                429,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                839,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                216,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,991,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                821,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,031,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||||||
| Depreciation | 
                                                3,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                674,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,221,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                14,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                957,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                172,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,947,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,298,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |