Balance Sheet
| Concept | As at 2024-08-31 | As at 2024-08-31 | As at 2024-08-31 | As at 2024-08-31 | As at 2024-08-31 | As at 2023-08-31 | As at 2023-08-31 | As at 2023-08-31 | As at 2023-08-31 | As at 2023-08-31 | As at 2022-08-31 | As at 2022-08-31 | As at 2022-08-31 | As at 2022-08-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance sheet | ||||||||||||||
| Balance sheet | ||||||||||||||
| Assets | ||||||||||||||
| Current assets | ||||||||||||||
| Cash and deposits | — | — | — | — | 
                                                1,005,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                666,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accounts receivable - trade | — | — | — | — | 
                                                145,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                122,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Prepaid expenses | — | — | — | — | 
                                                78,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                75,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Advance payments to suppliers | — | — | — | — | 
                                                2,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Raw materials and supplies | — | — | — | — | 
                                                22,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                16,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Allowance for doubtful accounts | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                52,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                37,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Current assets | — | — | — | — | 
                                                1,306,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                917,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Non-current assets | ||||||||||||||
| Property, plant and equipment | ||||||||||||||
| Buildings | — | — | — | — | 
                                                1,365,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,110,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accumulated depreciation | — | — | — | — | 
                                                -319,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -259,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Buildings, net | — | — | — | — | 
                                                1,045,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                851,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Property, plant and equipment | — | — | — | — | 
                                                1,140,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                947,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Leased assets, net | — | — | — | — | 
                                                3,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Construction in progress | — | — | — | — | 
                                                19,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                34,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Structures | — | — | — | — | 
                                                384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accumulated depreciation | — | — | — | — | 
                                                -384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -384,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Structures, net | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Machinery and equipment | — | — | — | — | 
                                                15,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accumulated depreciation | — | — | — | — | 
                                                -15,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -19,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Machinery and equipment, net | — | — | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Own-used assets | ||||||||||||||
| Leased assets | — | — | — | — | 
                                                8,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accumulated depreciation | — | — | — | — | 
                                                -4,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Tools, furniture and fixtures | — | — | — | — | 
                                                234,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                191,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accumulated depreciation | — | — | — | — | 
                                                -163,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -129,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Tools, furniture and fixtures, net | — | — | — | — | 
                                                71,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                61,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Intangible assets | — | — | — | — | 
                                                452,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                560,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Goodwill | — | — | — | — | 
                                                361,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                451,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Software | — | — | — | — | 
                                                93,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Intangible assets | ||||||||||||||
| Other intangible assets | ||||||||||||||
| Investments and other assets | ||||||||||||||
| Investments and other assets | — | — | — | — | 
                                                548,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                457,974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Long-term prepaid expenses | — | — | — | — | 
                                                54,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                42,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Deferred tax assets | — | — | — | — | 
                                                60,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                56,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                26,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                24,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Non-current assets | — | — | — | — | 
                                                2,140,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,966,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other assets | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other assets | ||||||||||||||
| Deferred assets | — | — | — | — | 
                                                3,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Bond issuance costs | — | — | — | — | 
                                                3,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,652,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Deferred assets | ||||||||||||||
| Assets | — | — | — | — | 
                                                3,451,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,892,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other assets | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other assets | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities | ||||||||||||||
| Current liabilities | — | — | — | — | 
                                                1,251,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,020,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Short-term borrowings | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accounts payable - trade | — | — | — | — | 
                                                222,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                186,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accounts payable - other | — | — | — | — | 
                                                47,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                76,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Accrued expenses | — | — | — | — | 
                                                185,622,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                131,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Income taxes payable | — | — | — | — | 
                                                111,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Deposits received | — | — | — | — | 
                                                13,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                94,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                99,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Non-current liabilities | ||||||||||||||
| Non-current liabilities | — | — | — | — | 
                                                1,429,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,387,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Bonds payable | — | — | — | — | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Long-term borrowings | — | — | — | — | 
                                                1,172,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                931,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other | — | — | — | — | 
                                                46,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                38,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Lease liabilities | — | — | — | — | 
                                                4,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Asset retirement obligations | — | — | — | — | 
                                                144,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                131,408,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Long-term accounts payable - other | — | — | — | — | 
                                                35,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                159,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Current liabilities | ||||||||||||||
| Current portion of bonds payable | — | — | — | — | 
                                                98,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Current portion of long-term borrowings | — | — | — | — | 
                                                424,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                318,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Lease liabilities | — | — | — | — | 
                                                3,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Contract liabilities | — | — | — | — | 
                                                7,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Deposits received | ||||||||||||||
| Provision for bonuses | — | — | — | — | 
                                                41,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Provisions | ||||||||||||||
| Liabilities | — | — | — | — | 
                                                2,680,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,408,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Other liabilities | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other liabilities | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Liabilities and net assets | ||||||||||||||
| Shareholders' equity | — | — | — | — | 
                                                770,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                484,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Share capital | — | — | — | — | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | — | 
                                                760,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                474,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Net assets | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                760,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                770,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                760,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                770,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                474,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                484,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                474,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                484,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                416,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                406,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                406,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | — | — | — | — | 
                                                3,451,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,892,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Net assets | ||||||||||||||
| Shareholders' equity | ||||||||||||||
| Retained earnings |