| Jan 31, 2013 | Jan 31, 2014 | Jan 31, 2015 | Jan 31, 2016 | Jan 31, 2017 | Jan 31, 2018 | Jan 31, 2019 | Jan 31, 2020 | Jan 31, 2021 | Jan 31, 2022 | Jan 31, 2023 |
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| Profit (loss) before income taxes | 586 | -140 | 601 | -217 | 619 | 704 | 633 | 822 | -19 | 670 | 483 |
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| Depreciation | 690 | 698 | 670 | 661 | 631 | 632 | 621 | 617 | 618 | 660 | 669 |
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| Share-based payment expenses | - | - | - | - | - | - | - | - | 10 | 13 | 13 |
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| Increase (decrease) in retirement benefit liability | - | - | 44 | 3 | 22 | 20 | 6 | 8 | 10 | 22 | 14 |
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| Interest and dividend income | -13 | -15 | -16 | -17 | -17 | -17 | -12 | -11 | -9 | -8 | -7 |
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| Receipt benefit | - | - | - | - | - | - | - | - | -13 | -191 | -20 |
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| Insurance claim income | - | - | - | - | - | -1 | -41 | -4 | -3 | -2 | -1 |
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| Interest expenses | 176 | 172 | 165 | 168 | 147 | 126 | 99 | 86 | 80 | 84 | 73 |
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| Loss (gain) on sale of property, plant and equipment | - | 553 | - | - | - | -139 | - | - | - | - | -217 |
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| Subsidy income | -4 | - | - | - | - | - | -10 | - | -62 | - | -48 |
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| Loss on tax purpose reduction entry of non-current assets | 4 | - | - | - | - | - | 10 | - | 62 | - | 48 |
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| Loss on retirement of property, plant and equipment | 35 | 22 | 12 | 4 | 5 | 15 | 4 | 7 | 1 | 2 | 1 |
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| Decrease (increase) in trade receivables | -63 | -23 | -145 | 125 | 37 | 30 | -60 | -16 | 67 | -94 | 42 |
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| Decrease (increase) in inventories | -745 | -604 | 177 | 551 | -1,280 | 987 | -1,089 | 734 | 281 | -785 | 1,042 |
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| Decrease (increase) in guarantee deposits | -1 | -100 | -2 | 2 | -18 | 1 | -4 | -7 | 7 | -72 | -59 |
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| Decrease (increase) in long-term prepaid expenses | -10 | -19 | -50 | 52 | -21 | -4 | -26 | -25 | -35 | 14 | 6 |
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| Increase (decrease) in trade payables | 62 | 1 | 13 | 38 | 12 | -34 | 521 | -498 | -93 | 90 | -74 |
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| Increase (decrease) in accounts payable - other, and accrued expenses | 56 | -1 | 19 | -9 | -90 | -20 | 42 | -32 | -52 | 57 | -37 |
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| Increase/decrease in consumption taxes payable/consumption taxes refund receivable | - | - | - | - | - | - | -258 | 177 | -15 | -131 | 206 |
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| Increase (decrease) in guarantee deposits received | 57 | -170 | -27 | -59 | -33 | -49 | 2 | 9 | -37 | -733 | 402 |
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| Other, net | -142 | 378 | -226 | 146 | 32 | 19 | 75 | 141 | -130 | 166 | 16 |
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| Subtotal | 695 | 758 | 1,382 | 2,399 | 50 | 2,349 | 624 | 2,002 | 722 | -237 | 2,552 |
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| Interest and dividends received | 5 | 7 | 8 | 9 | 8 | 8 | 5 | 5 | 3 | 3 | 3 |
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| Benefit received | - | - | - | - | - | - | - | - | 13 | 191 | 20 |
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| Proceeds from insurance income | - | - | - | - | - | 1 | 41 | 4 | 3 | 2 | 1 |
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| Interest paid | -175 | -171 | -163 | -169 | -149 | -125 | -99 | -87 | -80 | -85 | -71 |
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| Income taxes paid | -34 | -297 | -279 | -337 | -22 | -398 | -500 | -138 | -144 | -57 | -304 |
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| Net cash provided by (used in) operating activities | 491 | 297 | 948 | 1,901 | -114 | 1,834 | 71 | 1,786 | 517 | -182 | 2,201 |
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| Proceeds from redemption of securities | - | - | - | - | 15 | - | - | - | - | - | 75 |
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| Purchase of property, plant and equipment | -392 | -842 | -1,533 | -2,550 | -561 | -600 | -1,297 | -386 | -384 | -1,414 | -550 |
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| Proceeds from sale of property, plant and equipment | 22 | 1,330 | 0 | 8 | - | 2,601 | - | - | - | - | 2,386 |
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| Purchase of intangible assets | -12 | -84 | -75 | -55 | -0 | -7 | -22 | -24 | -114 | -115 | -20 |
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| Subsidies received | - | - | - | - | - | - | - | - | 62 | - | 48 |
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| Other, net | 2 | 15 | 5 | 4 | 37 | 53 | 60 | 54 | 50 | 45 | 90 |
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| Net cash provided by (used in) investing activities | -415 | 396 | -1,633 | -2,641 | -499 | 2,232 | -1,259 | -413 | -385 | -1,484 | 2,029 |
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| Proceeds from short-term borrowings | 160 | 140 | - | - | - | - | - | - | - | 3,750 | 750 |
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| Repayments of short-term borrowings | -244 | -156 | - | - | - | - | - | - | - | -2,250 | -2,250 |
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| Proceeds from long-term borrowings | 3,050 | 4,100 | 6,301 | 3,375 | 3,480 | 2,384 | 3,600 | 2,760 | 3,495 | 3,665 | 2,638 |
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| Repayments of long-term borrowings | -3,009 | -3,523 | -6,381 | -2,497 | -3,007 | -4,008 | -3,786 | -3,808 | -2,641 | -2,880 | -3,924 |
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| Purchase of treasury shares | -1 | -2 | -3 | -5 | -1 | -3 | -0 | -0 | -0 | -1 | -0 |
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| Dividends paid | -79 | -80 | -79 | -80 | -79 | -111 | -79 | -79 | -103 | -79 | -80 |
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| Net cash provided by (used in) financing activities | -123 | 480 | -174 | 785 | -307 | -1,738 | -265 | -1,628 | 252 | 2,206 | -2,866 |
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| Net increase (decrease) in cash and cash equivalents | -46 | 1,173 | -859 | 45 | -920 | 2,328 | -1,453 | -255 | 384 | 540 | 1,363 |
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