Consolidated Balance Sheet
| Concept | As at 2024-05-31 | As at 2024-02-29 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                605,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                960,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                2,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Prepaid expenses | 
                                                77,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Supplies | 
                                                1,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -80,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                719,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,089,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                5,972,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,027,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                1,033,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,016,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                382,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                350,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                355,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                4,878,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,947,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings, net | 
                                                1,781,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,818,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                3,036,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,065,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                60,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Own-used assets | ||
| Other | — | — | 
| Intangible assets | ||
| Intangible assets | 
                                                61,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                6,692,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,116,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                2,137,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,288,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                1,039,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,186,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                1,065,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                58,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                3,203,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,477,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,419,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,560,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                990,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                990,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                971,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                971,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                1,975,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,115,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -517,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -517,622,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                68,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                68,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,488,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,639,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                6,692,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,116,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Other | 
                                                41,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Income taxes payable | 
                                                9,642,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                577,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                618,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                72,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,773,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                169,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                181,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Valuation and translation adjustments |