| 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 |
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| Profit (loss) before income taxes | 877 | 1,205 | 1,318 | 2,300 | 1,093 | 1,765 | -400 | 331 | 1,503 | 1,679 |
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| Depreciation | 727 | 694 | 653 | 722 | 975 | 959 | 904 | 817 | 780 | 818 |
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| Increase (decrease) in retirement benefit liability | - | 112 | 94 | 42 | 214 | 121 | 30 | 26 | 77 | -116 |
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| Increase (decrease) in provision for bonuses | 31 | 83 | 2 | 166 | 18 | 16 | 16 | -52 | 59 | 65 |
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| Increase (decrease) in provision for bonuses for directors (and other officers) | -2 | 5 | -5 | 9 | -9 | 11 | -12 | -4 | 12 | 23 |
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| Increase (decrease) in provision for share awards for directors (and other officers) | - | - | - | - | - | - | 29 | 29 | 25 | 12 |
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| Increase (decrease) in allowance for doubtful accounts | -100 | - | -30 | -22 | -6 | 7 | -10 | 5 | 6 | -3 |
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| Increase (decrease) in provision for loss on construction contracts | - | - | - | - | - | - | - | - | 14 | -6 |
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| Interest and dividend income | -55 | -71 | -53 | -34 | -27 | -24 | -22 | -24 | -19 | -20 |
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| Interest expenses | 27 | 22 | 19 | 37 | 59 | 43 | 26 | 10 | 7 | 6 |
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| Surrender value of insurance policies | - | - | - | - | - | - | - | - | -37 | - |
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| Subsidies for employment adjustment-OpeCF | - | - | - | - | - | - | - | - | -75 | - |
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| Loss (gain) on sale of property, plant and equipment | - | - | - | - | - | - | - | - | - | 6 |
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| Loss on retirement of property, plant and equipment | 36 | 18 | 11 | 3 | 38 | 8 | 11 | 28 | 7 | 7 |
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| Loss on retirement of intangible assets | - | - | 4 | - | - | - | - | - | 4 | - |
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| Loss (gain) on valuation of investment securities | 8 | 5 | - | - | - | - | - | - | - | 56 |
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| Loss (gain) on sale of investment securities | - | - | - | -240 | -105 | -47 | -216 | 3 | - | -1 |
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| Loss (gain) on sale of shares of subsidiaries and associates | - | - | -767 | - | - | - | - | 1,178 | - | - |
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| Decrease (increase) in trade receivables | 483 | -547 | -230 | -886 | 692 | -456 | -735 | 986 | 452 | -2,042 |
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| Decrease (increase) in inventories | -248 | -396 | 452 | -479 | 168 | -851 | 304 | 76 | 14 | -222 |
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| Increase (decrease) in trade payables | -387 | 115 | -27 | 579 | -338 | 398 | -136 | -260 | 241 | 362 |
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| Other, net | 317 | 51 | -79 | -357 | 83 | 588 | 33 | -355 | 131 | -119 |
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| Subtotal | 2,051 | 1,533 | 2,433 | 1,622 | 2,972 | 2,577 | 1,769 | 2,843 | 3,036 | 495 |
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| Interest and dividends received | 56 | 71 | 53 | 33 | 28 | 24 | 22 | 24 | 19 | 20 |
|---|
| Interest paid | -29 | -26 | -17 | -38 | -59 | -42 | -26 | -10 | -8 | -5 |
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| Subsidies for employment adjustment received-OpeCF | - | - | - | - | - | - | - | - | 75 | - |
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| Income taxes paid | -132 | -244 | -413 | -923 | -1,101 | -353 | -962 | -160 | -80 | -383 |
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| Income taxes refund | 2 | 2 | - | 1 | 15 | - | - | 136 | 115 | - |
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| Net cash provided by (used in) operating activities | 1,948 | 1,337 | 2,056 | 696 | 1,855 | 2,206 | 802 | 2,832 | 3,157 | 126 |
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| Purchase of property, plant and equipment | -563 | -572 | -2,122 | -2,009 | -1,119 | -516 | -634 | -523 | -718 | -445 |
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| Proceeds from sale of property, plant and equipment | - | - | - | - | - | - | 41 | - | - | - |
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| Purchase of intangible assets | - | - | -74 | -394 | -105 | -135 | -97 | -249 | -259 | -232 |
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| Purchase of investment securities | -105 | -5 | -299 | - | -317 | -101 | -402 | -1 | -257 | -4 |
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| Proceeds from sale of investment securities | - | - | - | 364 | 640 | 98 | 305 | 4 | 1 | 4 |
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| Proceeds from sale of shares of subsidiaries resulting in change in scope of consolidation | - | - | 878 | 208 | - | - | - | 584 | 821 | - |
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| Proceeds from cancellation of insurance funds | - | - | - | - | - | - | - | - | 461 | - |
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| Other, net | -507 | -353 | -89 | 10 | -91 | - | -11 | -10 | -2 | 12 |
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| Net cash provided by (used in) investing activities | -676 | -966 | -1,671 | -1,820 | -994 | -572 | -993 | -165 | 46 | -665 |
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| Proceeds from long-term borrowings | - | 1,200 | 387 | 167 | 1,000 | 900 | - | - | 5,000 | - |
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| Repayments of long-term borrowings | -600 | -580 | -640 | -520 | -341 | -410 | -509 | -1,104 | -1,650 | -1,000 |
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| Proceeds from sale of treasury shares | - | - | - | - | 414 | - | 1 | 6 | 8 | 22 |
|---|
| Purchase of treasury shares | - | - | - | - | -415 | - | - | - | - | - |
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| Dividends paid | -239 | -257 | -274 | -291 | -383 | -423 | -446 | -465 | -364 | -501 |
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| Repayments of lease liabilities | - | - | - | - | - | -3 | -40 | -40 | -40 | -40 |
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| Net cash provided by (used in) financing activities | -840 | 262 | -611 | -278 | 456 | -483 | -996 | -1,604 | 2,953 | -1,519 |
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| Effect of exchange rate change on cash and cash equivalents | 171 | 522 | 258 | -61 | -116 | 22 | 37 | 103 | -31 | 22 |
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| Net increase (decrease) in cash and cash equivalents | 604 | 1,156 | 32 | -1,464 | 1,200 | 1,172 | -1,149 | 1,166 | 6,125 | -2,035 |
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