Quarterly Statement Of Cash Flows
| Concept | As at 2024-12-31 | 2024-07-01 to 2024-12-31 | As at 2024-06-30 | 2023-07-01 to 2023-12-31 | As at 2023-12-31 | As at 2023-06-30 | 
|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                -479,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -393,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign exchange losses (gains) | — | 
                                                6,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                51,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | — | 
                                                -169,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -372,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -1,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -170,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -374,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Proceeds from issuance of shares | — | 
                                                1,150,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,539,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -9,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                1,150,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,539,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -6,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                973,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,162,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                2,861,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,888,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,780,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,617,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |