Key Financial Data Of Reporting Company
| Concept | As at 2025-02-28 | 2024-09-01 to 2025-02-28 | As at 2024-08-31 | 2023-09-01 to 2024-08-31 | As at 2024-02-29 | 2023-09-01 to 2024-02-29 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | — | 
                                                8,909,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,290,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,490,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                802,971,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                445,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                65,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,421,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,885,810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                889,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                7,946,442,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,101,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,697,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | — | 
                                                12.45
                                                
                                             | — | 
                                                4.45
                                                
                                             | — | 
                                                0.32
                                                
                                             | 
| Diluted earnings per share | — | 
                                                11.28
                                                
                                             | — | 
                                                3.98
                                                
                                             | — | 
                                                0.29
                                                
                                             | 
| Equity-to-asset ratio | 
                                                0.428
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.405
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.188
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                403,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                697,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                23,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | 
                                                -428,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -120,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -127,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | 
                                                250,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,831,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                305,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                3,923,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,698,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,490,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |