Balance Sheet
| Concept | As at 2024-06-30 | As at 2023-12-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                4,117,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,399,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                662,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                707,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Supplies | 
                                                60,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                7,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise | 
                                                1,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                5,477,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,750,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                628,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                576,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                8,717,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,762,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                6,279,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,279,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                151,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | — | — | 
| Machinery and equipment, net | 
                                                16,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Property, plant and equipment | ||
| Own-used assets | ||
| Intangible assets | ||
| Intangible assets | 
                                                656,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                582,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,482,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,138,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                10,856,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,484,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | ||
| Assets | 
                                                16,334,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,234,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                5,497,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,752,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                5,243,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,497,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                253,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                254,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                3,970,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,161,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - trade | 
                                                169,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                507,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                507,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                201,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                345,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deposits received | 
                                                1,137,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,401,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,885,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,617,885,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                9,468,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,914,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                6,810,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,321,935,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                2,032,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,029,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                2,256,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,110,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                3,265,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,270,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -743,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,088,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                28,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                28,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                23,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                6,866,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,320,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                16,334,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,234,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Deposits received | ||
| Non-current liabilities | ||
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Net assets | ||
| Valuation and translation adjustments | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |