| Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
|---|
| Cash and deposits | - | 3,542 | 3,342 | 2,942 | 5,561 |
|---|
| Accounts receivable - trade | - | - | 2 | 3 | 0 |
|---|
| Securities | - | - | - | - | 21 |
|---|
| Inventories | - | - | 0 | 5 | 1 |
|---|
| Other | - | 3 | 3 | 7 | 29 |
|---|
| Advance payments to suppliers | - | - | 3 | 6 | 1 |
|---|
| Current assets | - | 3,619 | 3,367 | 2,977 | 5,612 |
|---|
| Prepaid expenses | - | 17 | 17 | 15 | 14 |
|---|
| Other | - | 3 | 3 | 7 | 29 |
|---|
| Current assets | - | 3,619 | 3,367 | 2,977 | 5,612 |
|---|
| Buildings, net | - | - | - | - | 392 |
|---|
| Buildings, net | - | 508 | 469 | 430 | 392 |
|---|
| Machinery, equipment, net | - | - | - | - | 85 |
|---|
| Machinery and equipment, net | - | 144 | 126 | 102 | 85 |
|---|
| Other | - | - | - | - | 37 |
|---|
| Tools, furniture and fixtures, net | - | 50 | 39 | 30 | 37 |
|---|
| Property, plant and equipment | - | 702 | 634 | 562 | 514 |
|---|
| Other | - | - | - | 6 | 17 |
|---|
| Intangible assets | - | - | - | 6 | 17 |
|---|
| Trademark right | - | - | - | - | 1 |
|---|
| Software | - | - | - | - | 1 |
|---|
| Other | - | - | - | 6 | 17 |
|---|
| Intangible assets | - | - | - | 6 | 17 |
|---|
| Other | - | - | - | 6 | 17 |
|---|
| Intangible assets | - | - | - | 6 | 17 |
|---|
| Other | - | 44 | 44 | 42 | 41 |
|---|
| Shares of subsidiaries and associates | - | - | - | - | 60 |
|---|
| Investments and other assets | - | 44 | 44 | 42 | 41 |
|---|
| Other | - | 44 | 44 | 42 | 41 |
|---|
| Investments and other assets | - | 44 | 44 | 42 | 41 |
|---|
| Other | - | 44 | 44 | 42 | 41 |
|---|
| Shares of subsidiaries and associates | - | - | - | - | 60 |
|---|
| Investments and other assets | - | 44 | 44 | 42 | 41 |
|---|
| Other | - | 44 | 44 | 42 | 41 |
|---|
| Investments and other assets | - | 44 | 44 | 42 | 41 |
|---|
| Non-current assets | - | 746 | 678 | 610 | 573 |
|---|
| Non-current assets | - | 746 | 678 | 610 | 573 |
|---|
| Assets | - | 4,364 | 4,045 | 3,587 | 6,185 |
|---|
| Income taxes payable | - | 3 | 3 | 3 | 46 |
|---|
| Accounts payable - other | - | 78 | 44 | 55 | 92 |
|---|
| Accounts payable - other | - | 78 | 44 | 55 | 92 |
|---|
| Income taxes payable | - | 3 | 3 | 3 | 46 |
|---|
| Deposits received | - | 20 | 60 | 39 | 28 |
|---|
| Current liabilities | - | 104 | 112 | 97 | 166 |
|---|
| Deferred tax liabilities | - | 9 | 9 | 8 | 7 |
|---|
| Asset retirement obligations | - | 28 | 28 | 28 | 28 |
|---|
| Non-current liabilities | - | 38 | 37 | 36 | 35 |
|---|
| Liabilities | - | 142 | 149 | 134 | 201 |
|---|
| Share capital | - | 100 | 10 | 10 | 1,595 |
|---|
| Capital surplus | - | 4,783 | 4,904 | 4,909 | 6,494 |
|---|
| Legal capital surplus | - | 2,440 | 2,455 | 2,455 | 4,040 |
|---|
| Other capital surplus | - | 2,343 | 2,449 | 2,453 | 2,453 |
|---|
| Capital surplus | - | 4,783 | 4,904 | 4,909 | 6,494 |
|---|
| Retained earnings | - | -643 | -1,018 | -1,470 | -2,102 |
|---|
| Retained earnings brought forward | - | -643 | -1,018 | -1,470 | -2,100 |
|---|
| Retained earnings | - | -643 | -1,018 | -1,470 | -2,102 |
|---|
| Treasury shares | - | -18 | -17 | -12 | -12 |
|---|
| Shareholders' equity | - | 4,222 | 3,880 | 3,437 | 5,975 |
|---|
| Share acquisition rights | - | - | 16 | 17 | 8 |
|---|
| Net assets | 750 | 4,222 | 3,896 | 3,454 | 5,984 |
|---|
| Non-controlling interests | - | - | - | - | 2 |
|---|
| Net assets | 750 | 4,222 | 3,896 | 3,454 | 5,984 |
|---|
| Liabilities and net assets | - | 4,364 | 4,045 | 3,587 | 6,185 |
|---|