| Mar 31,
2013 | Mar 31,
2014 | Mar 31,
2015 | Mar 31,
2016 | Mar 31,
2017 | Mar 31,
2018 | Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
|---|
| Profit (loss) before income taxes | -1,625 | 2,272 | 5,715 | 8,708 | 9,911 | 11,193 | 8,998 | 9,461 | 9,513 | 9,395 | 5,207 | -799 |
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| Depreciation | 395 | 345 | 362 | 380 | 438 | 498 | 684 | 671 | 1,038 | 1,432 | 1,007 | 831 |
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| Impairment losses | - | 117 | 776 | - | - | - | - | - | 3 | 297 | 45 | 36 |
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| Loss on litigation | 1,399 | 129 | 99 | 475 | 25 | 43 | 20 | 17 | 13 | 18 | 15 | 20 |
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| Increase (decrease) in allowance for doubtful accounts | 53 | -13 | -315 | -166 | -616 | -94 | -13 | -57 | -50 | 23 | 21 | 2,285 |
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| Increase (decrease) in provision for warranties for completed construction | 19 | 77 | 20 | 85 | 42 | -63 | 1,143 | 303 | 239 | -1,334 | 359 | -21 |
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| Increase (decrease) in provision for bonuses | -17 | 110 | 105 | 145 | 93 | 148 | 46 | 18 | 4 | 15 | -12 | 2 |
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| Increase (decrease) in retirement benefit liability | - | 7,443 | 100 | 29 | 34 | -9 | -236 | -6 | 221 | 153 | 157 | 30 |
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| Increase (decrease) in provision for retirement benefits for directors (and other officers) | - | - | - | - | - | - | - | - | - | - | 35 | -15 |
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| Increase (decrease) in provision for retirement benefits for executive officer (and other officers) | - | - | - | - | - | - | - | - | - | - | 25 | -6 |
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| Increase (decrease) in provision for loss on construction contracts | -107 | -21 | 211 | -173 | 229 | -175 | 133 | -313 | -71 | 564 | 755 | 2,135 |
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| Increase (decrease) in provision for share awards | - | - | - | - | - | - | - | 52 | 73 | 69 | 68 | 28 |
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| Loss (gain) on sale and retirement of non-current assets | -251 | 11 | -149 | 21 | 14 | -116 | 196 | -657 | 18 | -156 | 40 | -18 |
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| Interest and dividend income | -60 | -53 | -59 | -79 | -83 | -120 | -106 | -139 | -164 | -191 | -175 | -322 |
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| Interest expenses | 166 | 157 | 75 | 55 | 39 | 34 | 34 | 36 | 67 | 52 | 59 | 65 |
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| Foreign exchange losses (gains) | -138 | -31 | -179 | 132 | -36 | -10 | 17 | 23 | -122 | -189 | -129 | -328 |
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| Loss (gain) on sale of investment securities | - | - | - | - | - | - | -24 | -232 | -130 | -221 | -259 | -101 |
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| Decrease (increase) in trade receivables | -4,211 | -528 | -12,612 | 5,685 | -4,711 | 1,294 | -4,823 | -10,870 | -9,335 | -10,118 | 1,858 | -6,467 |
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| Decrease (increase) in inventories | 153 | -567 | 1,964 | -463 | -777 | -249 | -368 | -1,855 | 1,605 | 781 | 151 | 967 |
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| Increase (decrease) in trade payables | 3,580 | 402 | 2,423 | -658 | -1,390 | 2,723 | 165 | 5,115 | -5,258 | 1,139 | -152 | -418 |
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| Increase (decrease) in advances received on construction contracts in progress | -1,938 | 1,029 | -832 | -1,006 | 3,580 | -308 | 1,124 | -2,721 | 1,008 | 1,615 | -636 | -4,178 |
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| Decrease (increase) in other assets | -215 | 728 | -4,202 | 2,406 | -4,121 | 2,085 | -3,687 | -967 | -4,309 | 2,150 | 3,633 | 247 |
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| Increase (decrease) in other liabilities | 410 | 272 | 928 | 1,511 | 3,083 | 626 | 464 | -125 | 3,510 | 4,577 | 758 | -2,637 |
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| Other loss (gain) | -283 | -116 | 794 | 125 | 59 | 161 | 79 | 64 | 101 | 194 | 498 | 22 |
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| Subtotal | -2,467 | 4,454 | -5,442 | 17,436 | 6,030 | 17,715 | 3,849 | -2,178 | -2,028 | 10,270 | 13,274 | -8,641 |
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| Interest and dividends received | 60 | 53 | 59 | 79 | 82 | 120 | 106 | 128 | 160 | 188 | 187 | 327 |
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| Interest paid | -164 | -150 | -63 | -53 | -41 | -34 | -34 | -36 | -66 | -52 | -61 | -63 |
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| Income taxes paid | -135 | -259 | -540 | -2,518 | -3,982 | -2,668 | -3,626 | -3,166 | -2,392 | -4,859 | -1,144 | -3,145 |
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| Income taxes refund | 262 | - | - | - | - | - | - | - | - | - | 614 | 2 |
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| Payments for loss on litigation | -852 | -92 | -55 | -53 | -26 | -122 | -34 | -12 | -30 | -9 | -14 | -16 |
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| Net cash provided by (used in) operating activities | -3,297 | 4,005 | -6,042 | 14,890 | 2,062 | 15,010 | 261 | -5,265 | -4,357 | 5,537 | 12,856 | -11,536 |
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| Payments into time deposits | -62 | -66 | -66 | -110 | -109 | -124 | -2,520 | -20 | -10 | -10 | -10 | -10 |
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| Proceeds from withdrawal of time deposits | 69 | 65 | 66 | 154 | 118 | 124 | 2,520 | 20 | 20 | 10 | 10 | 10 |
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| Purchase of property, plant and equipment | -287 | -257 | -245 | -741 | -1,300 | -1,879 | -2,200 | -1,349 | -7,270 | -2,072 | -1,038 | -1,579 |
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| Proceeds from sale of property, plant and equipment | 474 | 34 | 1,253 | 184 | 6 | 628 | 34 | 1,639 | 22 | 610 | 74 | 236 |
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| Payments for retirement of property, plant and equipment | - | - | - | - | - | - | -75 | -33 | -29 | -12 | -41 | -13 |
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| Purchase of intangible assets | -26 | -20 | -32 | -33 | -15 | -28 | -33 | -24 | -111 | -100 | -287 | -188 |
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| Purchase of investment securities | -79 | -269 | -650 | -683 | -449 | -321 | -1,086 | -376 | -1,297 | -657 | -764 | -210 |
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| Proceeds from sale of investment securities | 38 | 97 | 159 | 60 | 101 | 99 | 64 | 668 | 429 | 459 | 467 | 350 |
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| Proceeds from refund of investment securities | - | - | - | - | - | - | - | - | - | - | 55 | 44 |
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| Decrease (increase) in short-term loans receivable | - | - | 5 | 3 | 6 | 4 | 2 | 1 | 14 | 3 | 10 | 8 |
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| Proceeds from collection of long-term loans receivable | 25 | 20 | 22 | 21 | 20 | 17 | 17 | 14 | 70 | 180 | 2,268 | 405 |
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| Payments of leasehold and guarantee deposits | - | - | - | - | - | - | - | - | - | - | - | -68 |
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| Proceeds from refund of leasehold and guarantee deposits | - | - | - | - | - | - | - | - | - | - | - | 26 |
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| Other, net | - | - | - | - | - | - | - | - | - | - | 14 | -7 |
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| Net cash provided by (used in) investing activities | 204 | -400 | 507 | -1,146 | -1,621 | -1,480 | -3,466 | -974 | -8,892 | -2,194 | 758 | -996 |
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| Increase (decrease) in short-term borrowings | - | - | - | - | - | - | - | - | 6,100 | -5,000 | -2,000 | 6,000 |
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| Proceeds from long-term borrowings | - | - | - | 3,150 | 3,150 | - | 3,150 | - | - | - | 5,878 | - |
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| Repayments of long-term borrowings | - | - | - | - | -3,150 | - | -3,150 | - | - | - | -3,150 | - |
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| Proceeds from issuance of shares | - | 2,423 | - | 5,417 | - | - | - | - | - | - | 40,188 | - |
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| Purchase of treasury shares | -1 | -6 | -12 | -10 | -8 | -8 | -1,003 | -834 | -1,256 | -4,769 | -42,015 | -5 |
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| Payments of money hold in trust for purchase of treasury stock | - | - | - | - | - | - | - | - | - | - | - | -208 |
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| Proceeds from disposal of treasury shares | - | 861 | - | - | - | - | - | - | - | - | - | - |
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| Dividends paid | -64 | -64 | -149 | -224 | -429 | -774 | -1,290 | -1,277 | -1,680 | -1,995 | -4,256 | -4,071 |
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| Dividends paid to non-controlling interests | - | - | -1 | -1 | -1 | -2 | -2 | -2 | -2 | -2 | -3 | -3 |
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| Repayments of lease liabilities | -29 | -51 | -39 | -12 | -22 | -7 | -8 | -11 | -8 | -4 | -10 | -9 |
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| Other, net | - | - | -34 | -55 | -33 | -81 | -39 | -22 | -70 | -198 | -61 | 23 |
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| Net cash provided by (used in) financing activities | -696 | 2,406 | 3,113 | 1,712 | -496 | -874 | -2,342 | -2,148 | 11,054 | -11,971 | -5,431 | 1,725 |
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| Effect of exchange rate change on cash and cash equivalents | 138 | -8 | 98 | -58 | 15 | -16 | -16 | -3 | 123 | 176 | 90 | 307 |
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| Net increase (decrease) in cash and cash equivalents | -3,649 | 6,002 | -2,322 | 15,397 | -40 | 12,639 | -5,564 | -8,392 | -2,071 | -8,451 | 8,273 | -10,501 |
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