Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,559,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,540,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,465,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,558,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,559,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,231,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,287,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                269,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,236,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                437,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                357,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                249,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||||||
| Depreciation | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,612,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,514,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,514,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,513,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                332,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,760,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,203,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,571,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |