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 | 
                                                2,546,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,787,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                98,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                100,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                348,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                149,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                4,838,816,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,874,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                1,272,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                908,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                797,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                797,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -146,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -112,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                650,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                685,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                808,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                375,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -186,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -151,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                621,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                113,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                145,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                174,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                209,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                488,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                472,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Deferred tax assets | 
                                                62,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                63,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,935,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,590,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                6,774,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,465,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                250,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                322,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                365,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                278,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,346,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,179,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                359,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                515,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                296,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                294,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                656,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                810,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,003,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,989,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                807,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                807,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                787,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                787,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                2,122,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,839,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,717,374,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,434,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Foreign currency translation adjustment | 
                                                35,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                35,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                18,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,771,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,475,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,774,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,465,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |