Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-06-30 | As at 2023-12-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                967,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,436,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                156,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -24,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,780,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,411,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                53,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Goodwill | 
                                                671,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                734,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                104,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                1,720,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,870,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                655,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                649,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                2,428,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,583,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                4,208,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,995,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                37,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                49,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,595,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,259,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,191,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,360,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                28,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,589,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,990,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,184,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,250,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                4,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                368,857,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                406,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                613,156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                613,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                142,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                142,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                34,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                789,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                948,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Foreign currency translation adjustment | 
                                                -211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                31,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                203,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                774,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,024,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,745,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                4,208,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,995,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |