Quarterly Consolidated Balance Sheet
| Concept | As at 2024-06-30 | As at 2023-12-31 | 
|---|---|---|
| Quarterly consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                939,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                319,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                25,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,039,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                439,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                46,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Accumulated depreciation | 
                                                -11,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -23,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other | 
                                                303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                32,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                42,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Deferred tax assets | 
                                                23,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                120,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                97,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                1,160,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                536,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                8,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                30,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,816,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                179,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                20,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                20,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                200,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                144,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                382,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                696,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                412,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -119,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -119,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                959,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                959,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,160,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                536,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |