Semi-Annual Consolidated Statement Of Cash Flows
| Concept | As at 2024-06-30 | 2024-01-01 to 2024-06-30 | As at 2023-12-31 | As at 2023-06-30 | 2023-01-01 to 2023-06-30 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Subtotal | — | 
                                                -609,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -506,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                23,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -2,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -611,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -509,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Net cash provided by (used in) investing activities | — | 
                                                557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -5,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Proceeds from issuance of shares | — | 
                                                2,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,457,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                2,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,947,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -608,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,432,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                4,947,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,555,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,953,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,520,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |