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 | 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 | 
                                                18,948,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,236,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,298,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,298,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,114,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,840,681,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,423,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,229,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,423,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,353,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                1,347,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,236,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,236,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,833,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,789,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,179,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,789,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                112,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                772,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,624,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,079,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,704,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,829,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,251,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,121,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                861,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,448,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,569,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |