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 | 
                                                5,031,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,022,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                601,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                299,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -20,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                16,134,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,958,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                17,642,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,961,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                9,298,719,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,927,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                6,190,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,190,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                709,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,385,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                1,443,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,457,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Goodwill | 
                                                147,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                372,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                407,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                519,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                583,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,004,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                948,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Other | 
                                                1,004,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                950,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                19,165,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,492,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                35,300,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,451,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                2,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                311,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,277,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,675,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                5,728,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,155,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                5,185,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,699,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | 
                                                15,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                292,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                276,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                22,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                819,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                841,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                6,334,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,855,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                12,063,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,010,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                499,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                20,776,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,656,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -925,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -926,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                21,350,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,228,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                124,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                1,763,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,129,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,887,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,211,972,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                23,237,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,440,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                35,300,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,451,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |