| Mar 31,
2018 | Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
|---|
| Cash and deposits | - | 419 | 601 | 476 | 499 | 601 | 842 |
|---|
| Accounts receivable - trade | - | 533 | 434 | 354 | 403 | 691 | 749 |
|---|
| Merchandise and finished goods | - | 129 | 130 | 108 | 152 | 178 | 212 |
|---|
| Raw materials and supplies | - | 1 | 2 | - | 1 | 1 | 2 |
|---|
| Prepaid expenses | - | 5 | 6 | 6 | 5 | 7 | 10 |
|---|
| Accounts receivable - other | - | 11 | 2 | 5 | 6 | 10 | 12 |
|---|
| Other | - | - | - | - | - | - | 8 |
|---|
| Allowance for doubtful accounts | - | -6 | -4 | -2 | -1 | -3 | -5 |
|---|
| Current assets | - | 1,102 | 1,172 | 1,018 | 1,074 | 1,488 | 1,833 |
|---|
| Buildings | - | 7 | 7 | 7 | 7 | 7 | 18 |
|---|
| Accumulated depreciation | - | -3 | -4 | -4 | -4 | -5 | -3 |
|---|
| Buildings, net | - | 3 | 2 | 2 | 2 | 1 | 14 |
|---|
| Tools, furniture and fixtures | - | 52 | 54 | 56 | 60 | 81 | 90 |
|---|
| Accumulated depreciation | - | -17 | -32 | -40 | -51 | -61 | -65 |
|---|
| Tools, furniture and fixtures, net | - | 35 | 21 | 15 | 9 | 20 | 25 |
|---|
| Leased assets | - | 4 | 4 | 4 | 4 | 4 | - |
|---|
| Accumulated depreciation | - | - | -1 | -2 | -3 | -4 | - |
|---|
| Leased assets, net | - | 3 | 2 | 1 | - | - | - |
|---|
| Property, plant and equipment | - | 42 | 26 | 19 | 12 | 22 | 40 |
|---|
| Software | - | 194 | 180 | 155 | 134 | 108 | 100 |
|---|
| Software in progress | - | - | - | - | - | 8 | - |
|---|
| Intangible assets | - | 194 | 180 | 155 | 134 | 116 | 100 |
|---|
| Distressed receivables | - | - | - | - | - | - | - |
|---|
| Deferred tax assets | - | 8 | 5 | 16 | 35 | 7 | 21 |
|---|
| Other | - | 27 | 33 | 39 | 45 | 51 | 70 |
|---|
| Allowance for doubtful accounts | - | - | - | - | - | - | - |
|---|
| Investments and other assets | - | 35 | 38 | 55 | 81 | 58 | 92 |
|---|
| Non-current assets | - | 272 | 245 | 229 | 228 | 197 | 232 |
|---|
| Assets | - | 1,375 | 1,418 | 1,248 | 1,302 | 1,685 | 2,066 |
|---|
| Accounts payable - trade | - | 364 | 300 | 250 | 329 | 490 | 572 |
|---|
| Accounts payable - other | - | 150 | 86 | 72 | 82 | 111 | 154 |
|---|
| Accrued expenses | - | 1 | 1 | 1 | 1 | 5 | 10 |
|---|
| Income taxes payable | - | 5 | 27 | - | - | 33 | 91 |
|---|
| Accrued consumption taxes | - | - | 10 | - | - | 11 | 9 |
|---|
| Deposits received | - | 2 | 2 | 2 | 2 | 8 | 10 |
|---|
| Asset retirement obligations | - | - | - | - | - | - | 3 |
|---|
| Other | - | 2 | 1 | 1 | 1 | 1 | 2 |
|---|
| Current liabilities | - | 527 | 431 | 328 | 418 | 662 | 853 |
|---|
| Provision for retirement benefits | - | 6 | 8 | 11 | 14 | 18 | 22 |
|---|
| Asset retirement obligations | - | 1 | 1 | 1 | 1 | 1 | 7 |
|---|
| Non-current liabilities | - | 10 | 12 | 14 | 16 | 20 | 30 |
|---|
| Liabilities | - | 537 | 443 | 343 | 435 | 682 | 883 |
|---|
| Share capital | - | 50 | 77 | 89 | 89 | 90 | 93 |
|---|
| Legal capital surplus | - | 396 | 424 | 435 | 436 | 436 | 439 |
|---|
| Capital surplus | - | 396 | 424 | 435 | 436 | 436 | 439 |
|---|
| Legal retained earnings | - | 2 | 2 | 2 | 2 | 2 | 2 |
|---|
| Retained earnings brought forward | - | 388 | 469 | 376 | 338 | 473 | 646 |
|---|
| Retained earnings | - | 391 | 472 | 379 | 341 | 476 | 649 |
|---|
| Treasury shares | - | - | - | - | - | - | - |
|---|
| Shareholders' equity | - | 837 | 975 | 905 | 867 | 1,002 | 1,182 |
|---|
| Net assets | 739 | 837 | 975 | 905 | 867 | 1,002 | 1,182 |
|---|
| Liabilities and net assets | - | 1,375 | 1,418 | 1,248 | 1,302 | 1,685 | 2,066 |
|---|