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 | 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 | 
                                                111,504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,887,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,605,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,605,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                90,473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,645,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,325,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -12,325,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                195,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,039,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                406,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                3,353,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,364,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -67,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,101,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -34,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income tax expense | 
                                                12,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,341,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,546,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                7,891,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,872,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,096,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -38,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |