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 | ||||||||||||
| Other items | ||||||||||||
| Depreciation | 
                                                19,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                530,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                500,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                530,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                573,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                599,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                599,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                5,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                381,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                370,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                381,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                467,502,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                533,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                533,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |