Consolidated Statement Of Cash Flows
| Concept | 2023-09-01 to 2024-08-31 | As at 2024-08-31 | As at 2023-08-31 | 2022-09-01 to 2023-08-31 | As at 2022-08-31 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Profit (loss) before income taxes | 
                                                -1,824,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                225,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | 
                                                4,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | 
                                                -15,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -7,653,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | 
                                                -1,957,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                536,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | 
                                                -2,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                -1,937,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                543,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                -238,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                227,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -10,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                -10,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Proceeds from issuance of shares | 
                                                1,464,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                1,478,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -469,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                544,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                4,329,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,799,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,254,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |