Consolidated Statement Of Cash Flows
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | As at 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | As at 2023-12-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | As at 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of cash flows | ||||||||||||||||||
| Statement of cash flows | ||||||||||||||||||
| Cash flows from operating activities | ||||||||||||||||||
| Profit (loss) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation and amortization | — | — | — | — | 
                                                102,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                114,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Finance income | — | — | — | — | 
                                                -114,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -26,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Finance costs | — | — | — | — | 
                                                2,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                4,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                1,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                298,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Subtotal | — | — | — | — | 
                                                233,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                5,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Interest received | — | — | — | — | 
                                                7,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                2,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Interest paid | — | — | — | — | 
                                                -2,791,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -4,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Income taxes paid | — | — | — | — | 
                                                -7,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -1,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | — | — | 
                                                230,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                2,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Cash flows from investing activities | ||||||||||||||||||
| Purchase of intangible assets | — | — | — | — | 
                                                -90,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -80,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Purchase of investment securities | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -39,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Proceeds from sale of investment securities | — | — | — | — | 
                                                39,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                2,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -1,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | — | — | 
                                                -56,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -363,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Cash flows from financing activities | ||||||||||||||||||
| Repayments of long-term borrowings | — | — | — | — | 
                                                -26,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -26,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Proceeds from exercise of employee share options | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                4,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | — | — | 
                                                -44,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -39,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Cash and cash equivalents | — | — | — | 
                                                3,700,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,495,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,201,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                3,596,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Effect of exchange rate changes on cash and cash equivalents | — | — | — | — | 
                                                75,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                6,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — |