Key Financial Data Of Reporting Company
| Concept | 2023-06-01 to 2023-08-31 | As at 2023-08-31 | As at 2023-05-31 | 2022-06-01 to 2023-05-31 | As at 2022-08-31 | 2022-06-01 to 2022-08-31 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | 
                                                2,804,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,367,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,643,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                370,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,690,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                415,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                16,678,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,332,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                15,406,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                20,757,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,634,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,125,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                35.57
                                                
                                             | — | — | 
                                                210.85
                                                
                                             | — | 
                                                40.46
                                                
                                             | 
| Diluted earnings per share |  | — | — |  | — |  | 
| Equity-to-asset ratio | — | 
                                                0.799
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.787
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.801
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |