Notes - Balance Sheet
| Concept | 
                                    
                                        As at 2024-03-31  | 
                            
                                
                                    
                                        As at 2024-03-31  | 
                            
                                
                                    
                                        As at 2023-03-31  | 
                            
                                
                                    
                                        As at 2023-03-31  | 
                            
                        
|---|---|---|---|---|
| Notes - Balance sheet | ||||
| Notes - Balance sheet | ||||
| Notes regarding amounts of notes and accounts receivable - trade and contract assets | — | 
                                        
                                             ※1 受取手形、売掛金、電子記録債権及び契約資産のうち、顧客との契約から生じた債権及び契約資産の金額は、 連結財務諸表「注記事項(収益認識関係)3.(1)契約資産の残高等」に記載しております。 
  | 
                                
                                    — | — | 
| Notes regarding assets and liabilities incurred from transactions with affiliated entities | — | — | — | |
| Notes regarding pledged assets | — | — | ||
| Notes regarding guarantee obligations | — | — | — | |
| Notes regarding trade notes receivable discounted or transferred by endorsement | — | — | ||
| Discounted trade notes receivable | 
                                        
                                             
                                                330,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                330,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                631,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                631,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Notes regarding promissory notes due on balance sheet date | — | — |