| Jan 31,
2015 | Jan 31,
2016 | Jan 31,
2017 | Jan 31,
2019 | Jan 31,
2020 | Jan 31,
2021 | Jan 31,
2022 | Jan 31,
2023 |
|---|
| Net sales of completed construction contracts | 3,004 | 3,781 | - | 4,762 | 3,225 | 3,414 | 5,737 | 5,242 |
|---|
| Net sales in sideline businesses | 57 | 66 | - | 166 | 212 | 268 | 230 | 216 |
|---|
| Net sales | 3,061 | 3,846 | - | 4,927 | 3,436 | 3,683 | 5,967 | 5,459 |
|---|
| Cost of sales of completed construction contracts | 2,301 | 2,937 | - | 3,740 | 2,559 | 2,749 | 4,435 | 4,402 |
|---|
| Cost of sales in sideline businesses | 44 | 42 | - | 133 | 168 | 201 | 174 | 167 |
|---|
| Cost of sales | 2,345 | 2,979 | - | 3,873 | 2,727 | 2,950 | 4,610 | 4,569 |
|---|
| Gross profit (loss) on completed construction contracts | 702 | 844 | - | 1,022 | 666 | 666 | 1,301 | 840 |
|---|
| Gross profit (loss) on sideline business | 13 | 23 | - | 32 | 43 | 67 | 56 | 49 |
|---|
| Gross profit (loss) | 716 | 867 | - | 1,054 | 709 | 733 | 1,357 | 890 |
|---|
| Remuneration for directors (and other officers) | 48 | 65 | - | 82 | 89 | 80 | 87 | 101 |
|---|
| Employees' salaries and allowances | 79 | 105 | - | 118 | 142 | 175 | 185 | 237 |
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| Retirement benefit expenses | 2 | 3 | - | 2 | 4 | 2 | 10 | 10 |
|---|
| Provision for retirement benefits for directors (and other officers) | - | - | - | - | - | - | - | 185 |
|---|
| Provision of allowance for doubtful accounts | - | 1 | - | - | - | - | - | - |
|---|
| Provision for shareholder benefit program | - | - | - | 10 | 12 | 9 | 14 | 35 |
|---|
| Depreciation | 8 | 23 | - | - | - | - | 139 | 50 |
|---|
| Depreciation | 8 | 23 | - | - | - | - | 139 | 50 |
|---|
| Provision for shareholder benefit program | - | - | - | 10 | 12 | 9 | 14 | 35 |
|---|
| Other | 194 | 223 | - | 345 | 368 | 342 | 454 | 488 |
|---|
| Provision for retirement benefits for directors (and other officers) | - | - | - | - | - | - | - | 185 |
|---|
| Selling, general and administrative expenses | 331 | 420 | - | 556 | 616 | 608 | 868 | 1,105 |
|---|
| Other | 194 | 223 | - | 345 | 368 | 342 | 454 | 488 |
|---|
| Selling, general and administrative expenses | 331 | 420 | - | 556 | 616 | 608 | 868 | 1,105 |
|---|
| Operating profit (loss) | 385 | 447 | - | 498 | 93 | 125 | 608 | -216 |
|---|
| Dividend income | - | - | - | 0 | 1 | 91 | 28 | 119 |
|---|
| Rental income from real estate | 11 | 11 | - | 24 | 35 | 37 | 38 | 40 |
|---|
| Share of profit of entities accounted for using equity method | - | - | - | - | - | - | 201 | - |
|---|
| Other | 2 | 3 | - | 6 | 8 | 15 | 11 | 6 |
|---|
| Other | 2 | 3 | - | 6 | 8 | 15 | 11 | 6 |
|---|
| Non-operating income | 13 | 34 | - | 29 | 45 | 144 | 278 | 165 |
|---|
| Non-operating income | 13 | 34 | - | 29 | 45 | 144 | 278 | 165 |
|---|
| Interest expenses | 1 | - | - | 1 | 2 | 8 | 8 | 7 |
|---|
| Rental expenses on real estate | 6 | 4 | - | 22 | 31 | 29 | 31 | 31 |
|---|
| Other | 1 | 1 | - | 4 | 4 | 12 | 7 | 7 |
|---|
| Commission expenses | - | 0 | - | 5 | 3 | 10 | - | - |
|---|
| Non-operating expenses | 9 | 17 | - | 32 | 41 | 56 | 45 | 44 |
|---|
| Other | 1 | 1 | - | 4 | 4 | 12 | 7 | 7 |
|---|
| Non-operating expenses | 9 | 17 | - | 32 | 41 | 56 | 45 | 44 |
|---|
| Ordinary profit (loss) | 389 | 464 | - | 495 | 97 | 213 | 840 | -95 |
|---|
| Gain on exchange from business combination | - | - | - | - | - | - | 1,275 | - |
|---|
| Extraordinary income | - | - | - | 388 | - | - | 1,275 | - |
|---|
| Profit (loss) before income taxes | 389 | 464 | - | 884 | 97 | 202 | 2,116 | -95 |
|---|
| Income taxes - current | 89 | 151 | - | 286 | 26 | 53 | 264 | 46 |
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| Income taxes - deferred | -11 | 21 | - | -23 | 12 | 7 | 384 | -77 |
|---|
| Income taxes | 169 | 172 | - | 262 | 38 | 59 | 648 | -31 |
|---|
| Profit (loss) | - | 292 | - | 621 | 60 | 143 | 1,468 | -64 |
|---|
| Profit (loss) attributable to non-controlling interests | - | - | - | -1 | -0 | 1 | -0 | 1 |
|---|
| Profit (loss) attributable to owners of parent | - | - | - | 622 | 60 | 143 | 1,468 | -64 |
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