| Oct 31,
2020 | Sep 30,
2021 | Sep 30,
2022 | Sep 30,
2023 |
|---|
| Cash and deposits | - | 394 | 643 | 1,963 |
|---|
| Trade accounts receivable | - | 426 | 491 | 602 |
|---|
| Accounts receivable from completed construction contracts | - | - | 5 | 72 |
|---|
| Contract assets | - | - | 3 | 21 |
|---|
| Real estate for sale | - | - | 589 | 1,011 |
|---|
| Costs on uncompleted construction contracts | - | 13 | 0 | 0 |
|---|
| Costs on service contracts in progress | - | 12 | - | 3 |
|---|
| Prepaid expenses | - | 195 | 225 | 252 |
|---|
| Other | - | 63 | 87 | 84 |
|---|
| Allowance for doubtful accounts | - | -0 | -0 | -0 |
|---|
| Current assets | - | 1,103 | 2,043 | 4,007 |
|---|
| Buildings | - | 2,791 | 4,096 | 4,679 |
|---|
| Structures | - | 19 | 37 | 34 |
|---|
| Tools, furniture and fixtures | - | 259 | 326 | 404 |
|---|
| Land | - | - | 1,044 | 2,229 |
|---|
| Leased assets | - | 5 | 5 | - |
|---|
| Construction in progress | - | 230 | 3 | 3 |
|---|
| Other | - | 0 | 0 | 0 |
|---|
| Accumulated depreciation and impairment | - | -1,036 | -1,712 | -1,955 |
|---|
| Property, plant and equipment | - | 2,267 | 3,800 | 5,393 |
|---|
| Software | - | 13 | 75 | 71 |
|---|
| Intangible assets | - | 31 | 75 | 71 |
|---|
| Leasehold and guarantee deposits | - | 1,349 | 1,518 | 1,633 |
|---|
| Long-term prepaid expenses | - | 16 | 1 | 0 |
|---|
| Deferred tax assets | - | 107 | 238 | 216 |
|---|
| Other | - | 36 | 86 | 87 |
|---|
| Allowance for doubtful accounts | - | - | -0 | -0 |
|---|
| Investments and other assets | - | 1,508 | 1,842 | 1,936 |
|---|
| Non-current assets | - | 3,806 | 5,717 | 7,400 |
|---|
| Assets | - | 4,908 | 7,760 | 11,407 |
|---|
| Trade accounts payable | - | 399 | 435 | 464 |
|---|
| Short-term borrowings | - | 157 | - | 1,842 |
|---|
| Current portion of long-term borrowings | - | 406 | 575 | 792 |
|---|
| Current portion of bonds payable | - | 20 | 20 | - |
|---|
| Accounts payable - other | - | 50 | 76 | 29 |
|---|
| Accrued expenses | - | 87 | 103 | 126 |
|---|
| Income taxes payable | - | 28 | 91 | 77 |
|---|
| Advances received | - | 439 | 452 | 464 |
|---|
| Contract liabilities | - | - | 28 | 314 |
|---|
| Deposits received | - | 116 | 170 | 171 |
|---|
| Provision for bonuses for directors (and other officers) | - | 17 | 18 | 18 |
|---|
| Provision for loss on orders received | - | 4 | 0 | 15 |
|---|
| Provision for loss compensation | - | - | 6 | - |
|---|
| Other | - | 41 | - | 15 |
|---|
| Current liabilities | - | 1,764 | 1,974 | 4,327 |
|---|
| Long-term borrowings | - | 1,175 | 3,564 | 3,137 |
|---|
| Guarantee deposits received | - | 1,123 | 1,339 | 1,451 |
|---|
| Asset retirement obligations | - | 106 | 127 | 181 |
|---|
| Other | - | 26 | 20 | 29 |
|---|
| Non-current liabilities | - | 2,449 | 5,049 | 4,798 |
|---|
| Liabilities | - | 4,213 | 7,023 | 9,125 |
|---|
| Share capital | - | 30 | 30 | 666 |
|---|
| Legal capital surplus | - | - | - | 636 |
|---|
| Capital surplus | - | - | - | 636 |
|---|
| Retained earnings brought forward | - | 665 | 702 | 980 |
|---|
| Retained earnings | - | 665 | 702 | 980 |
|---|
| Shareholders' equity | - | 695 | 732 | 2,282 |
|---|
| Share acquisition rights | - | - | 5 | - |
|---|
| Net assets | 597 | 695 | 737 | 2,282 |
|---|
| Liabilities and net assets | - | 4,908 | 7,760 | 11,407 |
|---|