Year To Quarter End Consolidated Statement Of Comprehensive Income
| Concept | 
                                    
                                        2023-04-01 to 2023-12-31  | 
                            
                        
|---|---|
| Year to quarter end consolidated statement of comprehensive income | |
| Statement of comprehensive income | |
| Profit (loss) | 
                                        
                                             
                                                -617,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Other comprehensive income | |
| Deferred gains or losses on hedges | 
                                        
                                             
                                                1,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Other comprehensive income | 
                                        
                                             
                                                1,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Comprehensive income | 
                                        
                                             
                                                -615,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Comprehensive income attributable to | |
| Comprehensive income attributable to owners of parent | 
                                        
                                             
                                                -615,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |