Notes - Consolidated Statement Of Income
| Concept | 
                                    
                                        2024-03-01 to 2025-02-28  | 
                            
                                
                                    
                                        2024-03-01 to 2025-02-28  | 
                            
                                
                                    
                                        2023-03-01 to 2024-02-29  | 
                            
                        
|---|---|---|---|
| Notes - Consolidated statement of income | |||
| Notes - Consolidated statement of income | |||
| Major components of selling, general and administrative expenses | — | — | |
| Research and development expenses included in general and administrative expenses and manufacturing costs for period | — | — | |
| Research and development expenses included in general and administrative expenses and manufacturing costs for period | — | 
                                        
                                             
                                                71,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                81,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Notes regarding gain on sale of property, plant and equipment | — | — | |
| Notes regarding loss on disposal and sale of property, plant and equipment | — |