Key Financial Data Of Reporting Company
| Concept | 2024-02-01 to 2024-04-30 | 2023-11-01 to 2024-04-30 | As at 2024-04-30 | As at 2023-10-31 | 2022-11-01 to 2023-10-31 | 2022-11-01 to 2023-04-30 | 2023-02-01 to 2023-04-30 | As at 2023-04-30 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||
| Business results of reporting company | ||||||||
| Net sales | — | 
                                                13,552,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                22,982,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,729,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Ordinary profit (loss) | — | 
                                                1,594,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,424,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,051,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net assets | — | — | 
                                                7,694,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,772,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,995,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | — | 
                                                14,086,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,527,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                11,319,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                21.73
                                                
                                             | 
                                                52.85
                                                
                                             | — | — | 
                                                80.11
                                                
                                             | 
                                                36.44
                                                
                                             | 
                                                17.38
                                                
                                             | — | 
| Diluted earnings per share | — | 
                                                52.76
                                                
                                             | — | — | 
                                                79.95
                                                
                                             | 
                                                36.36
                                                
                                             | — | — | 
| Equity-to-asset ratio | — | — | 
                                                0.546
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.540
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                0.529
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | — | 
                                                1,455,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,534,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,016,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -1,592,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,956,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,845,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                194,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                252,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                303,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | — | 
                                                1,922,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,855,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,487,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |