Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                231,888,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                229,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,981,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                231,888,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                190,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,613,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,342,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,758,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,758,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,802,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                869,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -25,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,642,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                6,940,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,022,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,078,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,400,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -71,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,379,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,369,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income tax expense | 
                                                20,941,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,848,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,694,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,951,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,498,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,630,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                19,338,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,418,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,482,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -76,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,994,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,071,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,010,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |