Key Financial Data Of Group
| Concept | 2023-11-01 to 2024-01-31 | 2023-05-01 to 2024-01-31 | As at 2024-01-31 | 2022-05-01 to 2023-04-30 | As at 2023-04-30 | 2022-11-01 to 2023-01-31 | As at 2023-01-31 | 2022-05-01 to 2023-01-31 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||
| Business results of group | ||||||||
| Net sales | — | 
                                                8,454,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,213,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,911,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                953,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,102,678,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                834,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | — | 
                                                1,309,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,092,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                610,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | — | 
                                                909,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,258,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                687,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | — | 
                                                15,257,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,456,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,885,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | — | 
                                                17,339,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,139,298,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,098,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                122.40
                                                
                                             | 
                                                964.48
                                                
                                             | — | 
                                                804.45
                                                
                                             | — | 
                                                296.08
                                                
                                             | — | 
                                                449.60
                                                
                                             | 
| Diluted earnings per share | — |  | — |  | — | — | — |  | 
| Equity-to-asset ratio | — | — | 
                                                0.880
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.843
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.863
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |