| Sep 30,
2021 | Sep 30,
2022 | Sep 30,
2023 |
|---|
| Profit (loss) before income taxes | 73 | 40 | 426 |
|---|
| Depreciation | 280 | 373 | 367 |
|---|
| Impairment losses | 174 | 330 | 47 |
|---|
| Increase (decrease) in allowance for doubtful accounts | 0 | 0 | -0 |
|---|
| Increase (decrease) in provision for bonuses for directors (and other officers) | -3 | 1 | - |
|---|
| Increase (decrease) in provision for loss on orders received | 2 | -3 | 15 |
|---|
| Increase (decrease) in provision for loss compensation | - | 6 | -6 |
|---|
| Gain on receipt of donated non-current assets | - | -0 | - |
|---|
| Interest income | -0 | -0 | -0 |
|---|
| Subsidy income | -0 | - | -1 |
|---|
| Sponsorship income | - | -1 | - |
|---|
| Gain on reversal of share acquisition rights | - | - | -5 |
|---|
| Penalty income | - | 1 | 0 |
|---|
| Interest expenses on borrowings and bonds | 14 | 33 | 49 |
|---|
| Commission expenses | 4 | 9 | - |
|---|
| Loss on retirement of non-current assets | 17 | 12 | 7 |
|---|
| Listing expenses | - | - | 8 |
|---|
| Share issuance costs | - | - | 10 |
|---|
| Loss compensation-OpeCF | - | - | 10 |
|---|
| Decrease (increase) in trade receivables | -114 | -70 | -178 |
|---|
| Decrease (increase) in contract asset | - | -3 | -17 |
|---|
| Decrease (increase) in costs on construction contracts in progress | 1 | 13 | -0 |
|---|
| Decrease (increase) in costs on uncompleted services | -1 | 12 | -3 |
|---|
| Decrease (increase) in real estate for sale | - | -590 | 458 |
|---|
| Increase (decrease) in trade payables | 67 | 20 | 46 |
|---|
| Decrease (increase) in prepaid expenses | -34 | -29 | -29 |
|---|
| Decrease (increase) in long-term prepaid expenses | 1 | 3 | 0 |
|---|
| Decrease (increase) in other assets | 20 | 54 | 8 |
|---|
| Increase (decrease) in accounts payable - other | 27 | 26 | -47 |
|---|
| Increase (decrease) in accrued expenses | -2 | 16 | 22 |
|---|
| Increase (decrease) in advances received | 124 | 13 | 12 |
|---|
| Increase (decrease) in contract liability | - | 28 | 287 |
|---|
| Increase (decrease) in deposits received | -17 | 54 | 2 |
|---|
| Increase (decrease) in guarantee deposits received | 222 | 216 | 113 |
|---|
| Increase (decrease) in other liabilities | 97 | -46 | 118 |
|---|
| Other, net | - | 0 | - |
|---|
| Subtotal | 953 | 518 | 1,718 |
|---|
| Interest paid | -14 | -34 | -45 |
|---|
| Interest and dividends received | 0 | 0 | 0 |
|---|
| Subsidies received | 0 | - | 1 |
|---|
| Income taxes paid | -120 | -72 | -158 |
|---|
| Compensation paid | - | - | -10 |
|---|
| Support money received | - | 1 | - |
|---|
| Penalty paid | - | -1 | -0 |
|---|
| Net cash provided by (used in) operating activities | 865 | 411 | 1,506 |
|---|
| Proceeds from withdrawal of time deposits | - | 10 | - |
|---|
| Purchase of property, plant and equipment | -806 | -2,256 | -2,912 |
|---|
| Payments for retirement of property, plant and equipment | - | -0 | -1 |
|---|
| Purchase of intangible assets | -19 | -58 | -17 |
|---|
| Payments for asset retirement obligations | - | -6 | - |
|---|
| Payments of leasehold and guarantee deposits | -248 | -200 | -105 |
|---|
| Proceeds from refund of leasehold and guarantee deposits | 32 | 32 | 57 |
|---|
| Decrease (increase) in investments and other assets | 2 | -50 | -72 |
|---|
| Net cash provided by (used in) investing activities | -1,040 | -2,529 | -3,051 |
|---|
| Net increase (decrease) in short-term borrowings | 7 | -157 | 1,842 |
|---|
| Proceeds from long-term borrowings | 503 | 3,181 | 922 |
|---|
| Repayments of long-term borrowings | -344 | -624 | -1,132 |
|---|
| Redemption of bonds | -40 | -20 | -20 |
|---|
| Proceeds from issuance of shares resulting from exercise of share acquisition rights | - | - | 3 |
|---|
| Proceeds from issuance of shares | - | - | 1,269 |
|---|
| Payments for issuance of shares | - | - | -10 |
|---|
| Commission fee paid | -4 | -9 | - |
|---|
| Proceeds from issuance of share acquisition rights | - | 5 | - |
|---|
| Payments of listing expenses | - | - | -8 |
|---|
| Net cash provided by (used in) financing activities | 122 | 2,377 | 2,865 |
|---|
| Net increase (decrease) in cash and cash equivalents | -53 | 259 | 1,320 |
|---|