| Feb 28,
2013 | Feb 28,
2014 | Feb 28,
2015 | Feb 29,
2016 | Feb 28,
2017 | Feb 28,
2018 | Feb 28,
2019 | Feb 29,
2020 | Feb 28,
2021 | Feb 28,
2022 | Feb 28,
2023 | Feb 29,
2024 |
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| Profit (loss) before income taxes | 184 | 1,684 | 4,816 | 7,171 | 9,141 | 10,829 | 12,609 | 14,282 | 1,140 | 4,996 | 11,175 | 11,985 |
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| Depreciation | 631 | 660 | 740 | 836 | 961 | 1,165 | 1,498 | 1,693 | 2,000 | 2,453 | 2,731 | 3,067 |
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| Share-based payment expenses | - | - | 32 | 178 | 344 | 274 | 252 | 225 | 498 | 783 | 916 | 537 |
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| Share of loss (profit) of entities accounted for using equity method | - | - | - | - | - | 24 | 196 | - | 742 | 125 | -380 | -9 |
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| Interest and dividend income | -0 | -0 | -1 | -1 | -0 | -0 | -3 | -3 | -3 | -5 | -4 | -4 |
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| Insurance claim income | - | - | - | - | - | - | - | -18 | -5 | -5 | -5 | - |
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| Commission expenses | - | - | - | - | - | - | - | 1 | 15 | 18 | 18 | 11 |
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| Loss (gain) on sale of investment securities | - | - | - | - | - | - | -4 | - | 5,725 | - | -24 | -61 |
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| Loss (gain) on valuation of investment securities | - | - | - | - | - | - | 58 | 3 | - | - | 253 | 743 |
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| Loss (gain) on investments in investment partnerships ,etc. | - | - | - | - | - | - | - | - | - | - | 72 | 7 |
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| Gain on reversal of share acquisition rights | - | - | - | - | - | - | - | -43 | -203 | -204 | -3 | -85 |
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| Impairment losses | 48 | - | - | - | - | - | - | - | - | 170 | 199 | 43 |
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| Decrease (increase) in trade receivables | 1,034 | -657 | -1,395 | -1,076 | -237 | 53 | -400 | -1,018 | 2,241 | -1,321 | -503 | -321 |
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| Increase (decrease) in trade payables | -78 | 10 | 59 | 2 | 5 | -30 | 59 | 27 | 29 | 115 | 40 | 17 |
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| Increase (decrease) in contract liabilities | - | - | - | - | - | - | - | - | - | - | 195 | 264 |
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| Increase (decrease) in accounts payable - other | - | - | - | - | - | - | - | - | -1,704 | 1,487 | 506 | 120 |
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| Increase (decrease) in allowance for doubtful accounts | -41 | 12 | 27 | 18 | -22 | 9 | 11 | -7 | -16 | 2 | 17 | 76 |
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| Increase (decrease) in provision for bonuses | - | - | - | - | 171 | 16 | 42 | 28 | -52 | 348 | 82 | 100 |
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| Increase (decrease) in contract provision for loss | - | - | - | - | - | - | - | - | - | 221 | -56 | -82 |
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| Loss (gain) on change in equity | - | - | - | - | - | - | -62 | - | -159 | - | - | -6 |
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| Decrease (increase) in other assets | 3 | -94 | -1 | -58 | -4 | -10 | -92 | -150 | -119 | 297 | 183 | -2,563 |
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| Increase (decrease) in other liabilities | -181 | 803 | 688 | 514 | 496 | 470 | 424 | 1,042 | -794 | 220 | 797 | -394 |
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| Other, net | 11 | 58 | 60 | 2 | 14 | 139 | 16 | 114 | 38 | 26 | 46 | 274 |
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| Subtotal | 1,712 | 2,614 | 5,069 | 7,686 | 10,934 | 12,957 | 14,633 | 16,345 | 9,331 | 10,060 | 16,254 | 13,716 |
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| Interest and dividends received | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 509 |
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| Proceeds from insurance income | - | - | - | - | - | - | - | 18 | 5 | 5 | 5 | - |
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| Income taxes paid | -334 | -96 | -1,188 | -2,694 | -2,828 | -3,228 | -3,707 | -3,971 | -3,430 | -194 | -3,056 | -4,698 |
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| Income taxes refund | - | - | - | - | - | - | - | - | - | 609 | 0 | - |
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| Net cash provided by (used in) operating activities | 1,360 | 2,504 | 3,877 | 4,991 | 8,106 | 9,729 | 10,927 | 12,392 | 5,906 | 10,482 | 13,204 | 9,527 |
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| Purchase of property, plant and equipment | -75 | -70 | -121 | -206 | -670 | -832 | -342 | -200 | -155 | -497 | -99 | -273 |
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| Purchase of intangible assets | -696 | -685 | -691 | -937 | -1,254 | -1,879 | -1,969 | -2,245 | -3,213 | -3,307 | -3,533 | -3,850 |
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| Purchase of investment securities | - | - | - | - | - | -1,556 | -3,762 | -671 | -9,869 | -100 | -462 | -348 |
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| Proceeds from sale of investment securities | - | - | - | - | - | - | 24 | - | 3,593 | - | 36 | 399 |
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| Payments into time deposits | - | - | -500 | - | - | - | - | - | - | - | - | -5,000 |
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| Proceeds from withdrawal of time deposits | - | - | - | 500 | - | - | - | - | - | - | - | 2,000 |
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| Proceeds from collection of long-term loans receivable | - | - | - | - | - | - | - | - | - | - | - | 75 |
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| Payments of leasehold and guarantee deposits | -76 | -90 | -101 | -173 | -387 | -90 | -43 | -83 | -4 | -1 | -100 | -357 |
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| Proceeds from refund of leasehold and guarantee deposits | 52 | 86 | 67 | 13 | 9 | 34 | 61 | 19 | 5 | 59 | 77 | 26 |
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| Payments for asset retirement obligations | -5 | -26 | -3 | - | -6 | -18 | -30 | -14 | - | -5 | -31 | -70 |
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| Proceeds From withdrawl of investments securities | - | - | - | - | - | - | - | - | - | - | - | 33 |
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| Other, net | - | - | -0 | - | - | - | - | - | - | - | -9 | - |
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| Net cash provided by (used in) investing activities | -800 | -786 | -1,348 | -803 | -2,308 | -4,364 | -6,360 | -3,376 | -9,643 | -3,851 | -4,122 | -7,365 |
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| Purchase of treasury shares | -123 | -0 | - | -1 | -250 | - | -1,709 | -1,805 | -0 | -90 | -0 | -6,460 |
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| Proceeds from sale of treasury shares | - | - | - | - | 250 | 130 | 81 | 84 | 89 | 280 | 166 | 2,683 |
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| Proceeds from exercise of employee share options | - | - | - | - | 192 | 182 | 23 | 199 | 12 | 501 | 75 | 235 |
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| Dividends paid | -90 | -91 | -558 | -1,109 | -1,892 | -2,243 | -2,751 | -2,993 | -3,163 | -3,200 | -3,903 | -4,472 |
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| Proceeds from share issuance to non-controlling shareholders | - | - | - | - | - | - | - | - | 36 | 2 | 1 | 3 |
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| Other, net | - | - | - | - | - | -1 | - | -1 | -15 | -18 | -18 | -11 |
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| Net cash provided by (used in) financing activities | -737 | -730 | -1,358 | -1,110 | -1,700 | -1,965 | -4,357 | -4,516 | -3,041 | -2,525 | -3,680 | -8,022 |
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| Effect of exchange rate change on cash and cash equivalents | - | - | - | - | - | - | - | - | - | - | 4 | 2 |
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| Net increase (decrease) in cash and cash equivalents | -177 | 989 | 1,171 | 3,078 | 4,098 | 3,400 | 210 | 4,500 | -6,779 | 4,107 | 5,405 | -5,858 |
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