| Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 | Mar 31,
2024 |
|---|
| Profit (loss) before tax | 56,649 | 44,749 | 52,001 | 83,642 | 93,384 | 117,184 |
|---|
| Depreciation and amortization | 26,624 | 31,952 | 34,700 | 37,940 | 39,194 | 39,814 |
|---|
| Impairment losses (reversal of impairment losses) | 1,675 | - | 464 | 889 | 6,396 | 3,578 |
|---|
| Foreign exchange loss (gain) | 410 | 2,873 | -2,019 | -2,706 | -5,397 | -13,670 |
|---|
| Interest and dividend income | -2,410 | -2,167 | -1,613 | -1,885 | -2,732 | -5,332 |
|---|
| Interest expenses | 767 | 899 | 850 | 843 | 1,417 | 2,585 |
|---|
| Share of loss (profit) of investments accounted for using equity method | -497 | -1,135 | -1,088 | -997 | -522 | -1,396 |
|---|
| Loss (gain) on sale and retirement of fixed assets | 910 | 637 | 1,220 | 1,014 | -468 | 1,493 |
|---|
| Loss (gain) on sale of shares of subsidiaries and associates-OpeCF (IFRS) | - | - | - | -8,621 | - | -503 |
|---|
| Decrease (increase) in trade and other receivables | -1,705 | 2,716 | -12,706 | -1,593 | 6,910 | -4,598 |
|---|
| Decrease (increase) in inventories | -15,526 | -6,560 | -4,859 | -18,542 | -30,840 | 18,507 |
|---|
| Increase (decrease) in trade and other payables | -56 | 4,401 | 406 | -5,029 | 143 | -2,249 |
|---|
| Increase (decrease) in retirement benefit liability | 1,052 | 1,867 | -244 | -1,307 | -7,573 | -346 |
|---|
| Other | -2,284 | -4,041 | 2,191 | 5,279 | 4,564 | -4,784 |
|---|
| Subtotal | 65,610 | 76,191 | 69,303 | 88,924 | 104,474 | 150,282 |
|---|
| Dividends received | 1,683 | 1,689 | 1,442 | 1,387 | 1,260 | 1,292 |
|---|
| Interest received | 778 | 989 | 618 | 681 | 1,116 | 2,792 |
|---|
| Interest paid | -709 | -766 | -804 | -720 | -1,405 | -2,476 |
|---|
| Income taxes paid | -20,932 | -18,316 | -7,162 | -18,362 | -36,141 | -33,712 |
|---|
| Net cash provided by (used in) operating activities | 46,430 | 59,787 | 63,397 | 71,910 | 69,305 | 118,179 |
|---|
| Net decrease (increase) in time deposits | -290 | 2,288 | -2,524 | -1,568 | 540 | -5,383 |
|---|
| Net decrease (increase) in marketable securities-InvCF (IFRS) | 16,981 | -54 | -18,000 | 14,000 | -2,993 | -1,958 |
|---|
| Purchase of property, plant and equipment | -50,786 | -50,629 | -26,972 | -24,386 | -20,628 | -32,335 |
|---|
| Proceeds from sale of property, plant and equipment | 433 | 225 | 428 | 357 | 3,782 | 1,205 |
|---|
| Purchase of intangible assets | -3,208 | -2,931 | -2,601 | -3,457 | -3,698 | -3,122 |
|---|
| Payments for acquisition of subsidiaries | -13,842 | - | - | -2,677 | -22,390 | -4,142 |
|---|
| Proceeds from sale of subsidiaries | - | - | - | - | - | 4,009 |
|---|
| Purchase of investment securities | -1,498 | -1,575 | -403 | -1,033 | -2,541 | -52,616 |
|---|
| Proceeds from sales and redemption of investment securities-InvCF (IFRS) | 3,424 | 363 | 8,199 | 11,034 | 9,573 | 1,301 |
|---|
| Other | -95 | -613 | 348 | 547 | 980 | 885 |
|---|
| Net cash provided by (used in) investing activities | -48,883 | -52,926 | -42,523 | 10,234 | -37,375 | -92,157 |
|---|
| Net increase (decrease) in short-term borrowings | 15,722 | -16,404 | 17,916 | -17,109 | 5,563 | 235 |
|---|
| Proceeds from long-term borrowings | 10,100 | 30,000 | 60,747 | 300 | 31,367 | 1,803 |
|---|
| Repayments of long-term borrowings | -9,962 | -9,924 | -4,962 | -18,003 | -6,971 | -3,081 |
|---|
| Redemption of bonds | -25,000 | - | -30,000 | - | - | -10,000 |
|---|
| Repayments of lease liabilities | -2,231 | -2,637 | -2,825 | -2,984 | -3,584 | -3,899 |
|---|
| Purchase of treasury shares | -5,002 | -10,074 | -7 | -495 | -1 | -10,003 |
|---|
| Dividends paid to owners of parent | -13,604 | -14,596 | -12,228 | -16,908 | -27,906 | -33,073 |
|---|
| Dividends paid to non-controlling interests | -242 | -254 | -55 | -144 | -239 | -100 |
|---|
| Capital contribution from non-controlling interests | - | 1,470 | - | 1,518 | - | 793 |
|---|
| Other | 35 | - | -419 | - | - | -124 |
|---|
| Net cash provided by (used in) financing activities | -10,291 | 7,432 | 28,166 | -53,827 | -1,772 | -57,450 |
|---|
| Effect of exchange rate changes on cash and cash equivalents | -330 | -2,605 | 4,388 | 4,747 | 1,363 | 8,042 |
|---|
| Net increase (decrease) in cash and cash equivalents | -13,075 | 11,687 | 53,427 | 33,064 | 31,520 | -23,385 |
|---|
| Net increase (decrease) in cash and cash equivalents resulting from transfer to assets held for sale-CF (IFRS) | - | - | - | - | -2,477 | 2,442 |
|---|