| Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 |
|---|
| Cash and deposits | - | 211 | 246 | 683 | 560 |
|---|
| Notes receivable - trade | - | 1 | 1 | 1 | 1 |
|---|
| Accounts receivable - trade | - | 120 | 119 | 156 | 195 |
|---|
| Work in process | - | 2 | 2 | 3 | 1 |
|---|
| Supplies | - | 0 | 0 | 0 | 0 |
|---|
| Advance payments to suppliers | - | - | - | 35 | - |
|---|
| Prepaid expenses | - | 8 | 14 | 16 | 21 |
|---|
| Advances paid | - | 14 | 4 | 8 | 13 |
|---|
| Income taxes refund receivable | - | 8 | 8 | - | 10 |
|---|
| Other | - | 3 | 3 | 3 | 2 |
|---|
| Allowance for doubtful accounts | - | -1 | -2 | -4 | -5 |
|---|
| Current assets | - | 366 | 397 | 901 | 799 |
|---|
| Facilities attached to buildings | - | 3 | 21 | 21 | 44 |
|---|
| Accumulated depreciation | - | -3 | -1 | -2 | -5 |
|---|
| Facilities attached to buildings, net | - | - | 20 | 19 | 39 |
|---|
| Tools, furniture and fixtures | - | - | 7 | 8 | 11 |
|---|
| Accumulated depreciation | - | - | -1 | -3 | -5 |
|---|
| Tools, furniture and fixtures, net | - | - | 6 | 5 | 5 |
|---|
| Property, plant and equipment | - | - | 26 | 24 | 44 |
|---|
| Trademark right | - | - | 1 | 2 | 2 |
|---|
| Software | - | 1 | 1 | 1 | 1 |
|---|
| Intangible assets | - | 1 | 2 | 3 | 2 |
|---|
| Long-term prepaid expenses | - | 1 | 1 | 1 | 2 |
|---|
| Deferred tax assets | - | 30 | 5 | 10 | 6 |
|---|
| Long-term time deposits | - | 1 | 1 | 1 | 1 |
|---|
| Leasehold deposits | - | 11 | 38 | 38 | 72 |
|---|
| Investments and other assets | - | 42 | 45 | 50 | 81 |
|---|
| Non-current assets | - | 43 | 72 | 76 | 127 |
|---|
| Assets | - | 409 | 469 | 978 | 927 |
|---|
| Accounts payable - trade | - | 112 | 89 | 119 | 124 |
|---|
| Current portion of long-term borrowings | - | 18 | 21 | 25 | - |
|---|
| Accounts payable - other | - | 33 | 50 | 85 | 119 |
|---|
| Accrued expenses | - | 7 | 8 | 9 | 11 |
|---|
| Income taxes payable | - | 12 | 15 | 57 | - |
|---|
| Accrued consumption taxes | - | 22 | 17 | 36 | 14 |
|---|
| Advances received | - | 10 | 7 | 9 | 2 |
|---|
| Deposits received | - | 0 | 4 | 4 | 6 |
|---|
| Current liabilities | - | 215 | 211 | 344 | 276 |
|---|
| Long-term borrowings | - | 151 | 159 | 134 | - |
|---|
| Asset retirement obligations | - | - | 8 | 8 | 16 |
|---|
| Non-current liabilities | - | 151 | 167 | 143 | 16 |
|---|
| Liabilities | - | 366 | 378 | 487 | 292 |
|---|
| Share capital | - | 8 | 8 | 160 | 218 |
|---|
| Legal capital surplus | - | - | - | 152 | 210 |
|---|
| Capital surplus | - | - | - | 152 | 210 |
|---|
| Retained earnings brought forward | - | 35 | 83 | 179 | 206 |
|---|
| Other retained earnings | - | - | 83 | 179 | 206 |
|---|
| Retained earnings | - | 35 | 83 | 179 | 206 |
|---|
| Treasury shares | - | - | - | - | -0 |
|---|
| Shareholders' equity | - | 43 | 91 | 491 | 635 |
|---|
| Net assets | -35 | 43 | 91 | 491 | 635 |
|---|
| Liabilities and net assets | - | 409 | 469 | 978 | 927 |
|---|