Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-03-31 | As at 2023-12-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                894,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,436,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                113,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -23,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,652,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,411,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                57,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Goodwill | 
                                                739,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                772,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                91,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                1,773,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,849,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                630,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                649,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                2,461,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,562,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                4,114,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,974,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                16,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                44,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,076,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,259,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,257,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,360,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                28,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,848,635,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,970,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,924,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,229,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                4,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                367,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                386,200,000
                                                
                                                    
                                                        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 | 
                                                111,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                867,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                947,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Foreign currency translation adjustment | 
                                                -248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                -248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                24,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                298,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                774,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,189,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,744,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                4,114,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,974,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |