| Mar 31, 2018 | Mar 31, 2019 | Mar 31, 2020 | Mar 31, 2021 | Mar 31, 2022 | Mar 31, 2023 | Mar 31, 2024 |
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Cash and deposits | - | 865 | 877 | 2,249 | 2,070 | 2,101 | 359 |
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Electronically recorded monetary claims - operating | - | - | - | - | - | 33 | 103 |
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Accounts receivable - trade, and contract assets | - | - | - | - | - | - | 1,599 |
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Accounts receivable - trade | - | 755 | 755 | 982 | 1,152 | 1,028 | 1,571 |
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Supplies | - | 11 | 10 | 17 | 24 | 25 | 17 |
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Inventories | - | - | - | - | - | - | 46 |
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Prepaid expenses | - | 122 | 182 | 207 | 236 | 236 | 156 |
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Short-term loans receivable | - | - | - | - | - | - | 9 |
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Other | - | 9 | 53 | 10 | 50 | 36 | 109 |
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Other | - | 9 | 53 | 10 | 50 | 36 | 109 |
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Allowance for doubtful accounts | - | -0 | -3 | -6 | -12 | -8 | -10 |
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Allowance for doubtful accounts | - | -0 | -3 | -6 | -12 | -8 | -10 |
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Current assets | - | 1,762 | 1,875 | 3,459 | 3,519 | 3,450 | 2,371 |
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Current assets | - | 1,762 | 1,875 | 3,459 | 3,519 | 3,450 | 2,371 |
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Facilities attached to buildings, net | - | 272 | 307 | 289 | 227 | 189 | 108 |
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Machinery and equipment, net | - | - | 34 | 27 | - | 1 | 2 |
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Vehicles, net | - | 19 | 18 | 17 | 23 | 3 | 2 |
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Tools, furniture and fixtures, net | - | 92 | 162 | 120 | 122 | 78 | 59 |
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Leased assets, net | - | - | 3 | 9 | 2 | 5 | 74 |
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Construction in progress | - | 30 | 9 | 9 | 5 | 1 | 3 |
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Property, plant and equipment | - | 413 | 534 | 471 | 380 | 277 | 248 |
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Goodwill | - | - | 9 | 7 | 5 | 3 | 1 |
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Software | - | 21 | 10 | 5 | 3 | 20 | 48 |
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Software in progress | - | - | - | - | 8 | 54 | 59 |
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Intangible assets | - | 21 | 19 | 12 | 15 | 77 | 108 |
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Investments in capital | - | - | - | - | 41 | 57 | 75 |
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Investment securities | - | 3 | 5 | 3 | 3 | 2 | 154 |
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Long-term loans receivable | - | - | - | - | - | - | 7 |
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Long-term prepaid expenses | - | 1 | 2 | 2 | 2 | 2 | 56 |
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Guarantee deposits | - | 732 | 770 | 991 | 1,203 | 1,421 | 1,323 |
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Distressed receivables | - | - | - | - | 13 | 7 | 55 |
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Other | - | 9 | 17 | 24 | 50 | 13 | 0 |
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Allowance for doubtful accounts | - | -0 | -7 | -13 | -27 | -7 | -55 |
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Investments and other assets | - | 811 | 852 | 1,075 | 1,325 | 1,494 | 1,615 |
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Non-current assets | - | 1,245 | 1,405 | 1,558 | 1,720 | 1,848 | 1,971 |
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Assets | - | 3,007 | 3,279 | 5,017 | 5,239 | 5,298 | 4,342 |
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Accounts payable - trade | - | 602 | 505 | 726 | 863 | 775 | 1,112 |
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Short-term borrowings | - | - | - | - | - | - | 369 |
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Current portion of long-term borrowings | - | 115 | 101 | 93 | 192 | 269 | 411 |
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Lease liabilities | - | - | 1 | 2 | 2 | 3 | 51 |
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Current portion of bonds payable | - | - | - | - | - | - | 7 |
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Accounts payable - other | - | 521 | 826 | 1,073 | 1,447 | 1,436 | 1,338 |
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Lease liabilities | - | - | 1 | 2 | 2 | 3 | 51 |
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Accrued expenses | - | 22 | 32 | 45 | 59 | 62 | 2 |
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Accounts payable - other | - | 521 | 826 | 1,073 | 1,447 | 1,436 | 1,338 |
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Income taxes payable | - | 70 | - | 108 | 20 | 16 | 41 |
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Accrued consumption taxes | - | 46 | 55 | 130 | 40 | 38 | 24 |
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Advances received | - | 20 | 11 | 30 | 32 | 75 | 68 |
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Advances received | - | 20 | 11 | 30 | 32 | 75 | 68 |
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Asset retirement obligations | - | - | - | - | - | - | 150 |
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Deposits received | - | 27 | 41 | 43 | 38 | 58 | 110 |
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Provision for bonuses | - | 62 | 53 | 63 | 70 | 89 | 3 |
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Asset retirement obligations | - | - | - | - | - | - | 150 |
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Provision for loss on office closing | - | - | - | - | - | - | 362 |
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Provision for transfer loss | - | - | - | - | - | 20 | - |
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Deposits received | - | 27 | 41 | 43 | 38 | 58 | 110 |
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Provision for bonuses | - | 62 | 53 | 63 | 70 | 89 | 3 |
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Other | - | 0 | 0 | 0 | 0 | 1 | 36 |
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Provision for loss on office closing | - | - | - | - | - | - | 362 |
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Current liabilities | - | 1,487 | 1,624 | 2,314 | 2,762 | 2,841 | 4,060 |
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Other | - | 0 | 0 | 0 | 0 | 1 | 36 |
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Current liabilities | - | 1,487 | 1,624 | 2,314 | 2,762 | 2,841 | 4,060 |
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Long-term borrowings | - | 399 | 468 | 471 | 526 | 808 | 886 |
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Bonds payable | - | - | - | - | - | - | 36 |
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Long-term guarantee deposits | - | 35 | 32 | 94 | 94 | 195 | 149 |
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Long-term borrowings | - | 399 | 468 | 471 | 526 | 808 | 886 |
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Lease liabilities | - | - | 3 | 9 | 6 | 8 | 220 |
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Long-term guarantee deposits | - | 35 | 32 | 94 | 94 | 195 | 149 |
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Asset retirement obligations | - | 59 | 67 | 71 | 84 | 219 | 42 |
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Lease liabilities | - | - | 3 | 9 | 6 | 8 | 220 |
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Deferred tax liabilities | - | - | - | - | - | 10 | 17 |
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Non-current liabilities | - | 493 | 570 | 645 | 710 | 1,238 | 1,349 |
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Asset retirement obligations | - | 59 | 67 | 71 | 84 | 219 | 42 |
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Non-current liabilities | - | 493 | 570 | 645 | 710 | 1,238 | 1,349 |
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Liabilities | - | 1,980 | 2,194 | 2,960 | 3,472 | 4,080 | 5,409 |
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Share capital | - | 80 | 80 | 493 | 523 | 526 | 605 |
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Legal capital surplus | - | - | - | 413 | 443 | 446 | 525 |
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Capital surplus | - | - | - | 413 | 443 | 446 | 525 |
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Capital surplus | - | - | - | 413 | 443 | 446 | 525 |
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Legal retained earnings | - | 6 | 8 | 8 | 9 | 9 | 9 |
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Retained earnings brought forward | - | 942 | 998 | 1,144 | 790 | 224 | -1,454 |
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Retained earnings | - | 947 | 1,006 | 1,152 | 799 | 234 | -2,233 |
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Retained earnings | - | 947 | 1,006 | 1,152 | 799 | 234 | -2,233 |
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Shareholders' equity | - | 1,027 | 1,086 | 2,057 | 1,765 | 1,205 | -1,104 |
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Valuation difference on available-for-sale securities | - | 0 | -0 | 0 | 2 | 6 | 18 |
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Valuation and translation adjustments | - | 0 | -0 | 0 | 2 | 6 | 18 |
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Share acquisition rights | - | - | - | - | - | 7 | 19 |
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Net assets | 772 | 1,027 | 1,086 | 2,057 | 1,767 | 1,218 | -1,067 |
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Liabilities and net assets | - | 3,007 | 3,279 | 5,017 | 5,239 | 5,298 | 4,342 |
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