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 | 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 | 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 | 
                                                93,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,176,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,028,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,491,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,009,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,183,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,491,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                921,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,390,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,390,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,183,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,994,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,212,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                367,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                382,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -382,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                421,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -421,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                397,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                18,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                130,253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                224,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,514,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                145,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                369,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |