Notes - Finance Income And Finance Costs
| Concept | 
                                    
                                        2024-03-01 to 2025-02-28  | 
                            
                                
                                    
                                        2023-03-01 to 2024-02-29  | 
                            
                        
|---|---|---|
| Notes - Finance income and finance costs | ||
| Components of finance income and finance costs | ||
| Finance income | ||
| Interest income | ||
| Financial assets measured at amortized cost | 
                                        
                                             
                                                652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                709,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Dividend income | ||
| Equity instruments designated as measured at fair value through other comprehensive income | 
                                        
                                             
                                                129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Finance income | 
                                        
                                             
                                                781,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,609,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Finance costs | ||
| Interest expenses | ||
| Financial liabilities measured at amortized cost | 
                                        
                                             
                                                1,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Other | 
                                        
                                             
                                                260,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                513,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Finance costs | 
                                        
                                             
                                                4,270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                4,847,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |