Key Financial Data Of Reporting Company
| Concept | As at 2024-11-30 | 2024-06-01 to 2024-11-30 | 2023-06-01 to 2024-05-31 | As at 2024-05-31 | As at 2023-11-30 | 2023-06-01 to 2023-11-30 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | — | 
                                                5,550,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,213,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,702,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                592,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,349,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                741,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                17,174,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                17,142,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,976,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                20,967,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                20,945,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,024,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | — | 
                                                57.08
                                                
                                             | 
                                                97.03
                                                
                                             | — | — | 
                                                72.34
                                                
                                             | 
| Diluted earnings per share | — |  |  | — | — |  | 
| Equity-to-asset ratio | 
                                                0.814
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.814
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.803
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                325,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,410,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                465,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | 
                                                -375,808,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,458,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -653,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | 
                                                -174,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -618,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -173,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                3,648,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,904,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,181,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |