| Mar 31,
2018 | Mar 31,
2019 | Mar 31,
2020 | Mar 31,
2021 | Mar 31,
2022 | Mar 31,
2023 |
|---|
| Profit (loss) | 22,108 | 24,013 | 22,485 | 23,954 | 14,622 | 27,410 |
|---|
| Depreciation and amortization of intangible assets | 19,030 | 19,059 | 52,815 | 52,159 | 50,828 | 56,686 |
|---|
| Impairment losses (reversal of impairment losses) | 1,254 | 2,045 | 4,169 | 1,339 | 4 | 394 |
|---|
| Income tax expense | 10,154 | 11,233 | 11,344 | 15,180 | 10,009 | 12,558 |
|---|
| Share of profit (loss) of investments accounts-OpeCF (IFRS) | - | - | -6,864 | -3,010 | -491 | -811 |
|---|
| Loss on fire-OpeCF (IFRS) | - | - | - | - | 7,294 | 9,566 |
|---|
| Insurance income arose from disaster-OpeCF (IFRS) | - | - | - | -50 | -429 | -1,144 |
|---|
| Loss (gain) on sale of fixed assets | -2,780 | -44 | -8,371 | -2,769 | -219 | -8,574 |
|---|
| Interest and dividend income | -1,117 | -1,482 | -1,267 | -1,270 | -1,375 | -1,132 |
|---|
| Interest expenses | 1,862 | 2,009 | 6,964 | 6,492 | 6,085 | 6,370 |
|---|
| Gain on sale of property, plant and equipment (increase) decrease in trade receivables and contract assets-OpeCF (IFRS) | -9,667 | 449 | 16,692 | -4,366 | -3,816 | 4,185 |
|---|
| Decrease (increase) in inventories | -227 | 389 | 60 | 77 | -256 | 80 |
|---|
| Increase (decrease) in trade payables | 2,738 | 816 | -8,303 | 3,084 | 2,276 | -4,424 |
|---|
| Increase (decrease) in deposits received-OpeCF (IFRS) | - | - | - | - | -242 | 45,223 |
|---|
| Increase (decrease) in retirement benefit liability | 863 | 225 | 2,741 | 1,976 | 2,283 | -3,538 |
|---|
| Increase (decrease) in other assets and other liabilities-OpeCF (IFRS) | -2,596 | -1,286 | -3,256 | -5,203 | -11,491 | -668 |
|---|
| Other | - | 17 | 1,145 | 996 | 1,743 | 2,281 |
|---|
| Subtotal | 37,021 | 47,890 | 89,110 | 83,694 | 76,825 | 144,462 |
|---|
| Interest and dividends received | 2,917 | 3,937 | 3,896 | 4,145 | 1,571 | 1,289 |
|---|
| Interest paid | -1,748 | -1,912 | -6,880 | -6,399 | -5,987 | -5,962 |
|---|
| Loss on disaster paid-OpeCF (IFRS) | - | - | - | - | -501 | -4,942 |
|---|
| Proceeds from insurance income- OpeCF (IFRS) | - | - | - | 50 | 429 | 1,144 |
|---|
| Income taxes paid | -10,266 | -12,103 | -7,922 | -26,131 | -7,202 | -13,928 |
|---|
| Net cash provided by (used in) operating activities | 27,924 | 37,812 | 78,204 | 55,309 | 65,135 | 122,063 |
|---|
| Purchase of property, plant and equipment, and intangible assets | -12,197 | -14,948 | -12,709 | -19,792 | -20,359 | -26,374 |
|---|
| Proceeds from sale of property, plant and equipment, and intangible assets | 5,485 | 1,491 | 13,105 | 3,814 | 760 | 11,488 |
|---|
| Payments of loans receivable to parent company-InvCF (IFRS) | - | - | - | - | - | -97,200 |
|---|
| Right of use assets-InvCF (IFRS) | - | - | - | 87,183 | 14 | - |
|---|
| Acquisition of subsidiaries-InvCF (IFRS) | - | - | -666 | -1,476 | - | -3,796 |
|---|
| Payments into time deposits | - | - | - | -572 | -6,049 | -24,560 |
|---|
| Proceeds from withdrawal of time deposits | - | - | - | - | 954 | 23,461 |
|---|
| Payments for acquisition of businesses | - | - | - | - | - | -107 |
|---|
| Other | 534 | 131 | -508 | 622 | 757 | -222 |
|---|
| Net cash provided by (used in) investing activities | -6,178 | -13,892 | -1,162 | 69,779 | -24,877 | -117,310 |
|---|
| Net increase (decrease) in short-term borrowings | 1,834 | -4,775 | -2,075 | -1,575 | -1,165 | -1,187 |
|---|
| Proceeds from long-term loans payable-FinCF (IFRS) | - | 49,749 | - | - | - | 198,783 |
|---|
| Repayments of long-term borrowings | -1,502 | -11,490 | -739 | -10,409 | -10,329 | -90,118 |
|---|
| Repayments of lease liabilities-FinCF (IFRS) | - | -4,964 | -37,103 | -36,648 | -33,758 | -36,026 |
|---|
| Payments for acquisition of interests in subsidiaries from non-controlling interests | -7,484 | -4,963 | -199 | -7,541 | -1,792 | - |
|---|
| Dividends paid | -3,904 | -4,127 | -4,686 | -4,299 | -4,696 | -2,348 |
|---|
| Dividends paid to non-controlling interests | -108 | -151 | -180 | -121 | -174 | -260 |
|---|
| Purchase of treasury shares | - | - | -2 | -99,633 | -1 | -221,997 |
|---|
| Proceeds from issuance of shares | - | - | - | - | - | 136,720 |
|---|
| Other | -432 | -703 | -723 | -944 | -596 | -833 |
|---|
| Net cash provided by (used in) financing activities | -16,445 | 21,104 | -45,707 | -161,056 | -52,511 | -17,266 |
|---|
| Effect of exchange rate changes on cash and cash equivalents | 713 | -109 | -726 | 1,762 | 2,345 | 1,398 |
|---|
| Net increase (decrease) in cash and cash equivalents | 6,014 | 44,915 | 30,609 | -34,206 | -9,908 | -11,115 |
|---|