| Jun 30,
2013 | Jun 30,
2014 | Jun 30,
2015 | Jun 30,
2016 | Jun 30,
2017 | Jun 30,
2018 | Jun 30,
2019 | Jun 30,
2020 | Jun 30,
2021 | Jun 30,
2022 | Jun 30,
2023 | Jun 30,
2024 |
|---|
| Net sales | 3,045 | 3,915 | 3,997 | 4,598 | 4,908 | 5,632 | 5,914 | 5,830 | 5,498 | 6,207 | 6,390 | 7,211 |
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| Cost of sales | 1,884 | 2,395 | 2,362 | 2,860 | 3,096 | 3,596 | 3,723 | 3,666 | 3,424 | 3,863 | 3,964 | 4,594 |
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| Gross profit (loss) | 1,161 | 1,520 | 1,634 | 1,738 | 1,812 | 2,036 | 2,191 | 2,165 | 2,074 | 2,345 | 2,427 | 2,617 |
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| Remuneration for directors (and other officers) | 102 | 108 | 110 | 107 | 109 | 115 | 125 | 132 | 135 | 90 | 78 | - |
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| Provision for bonuses for directors (and other officers) | 16 | 26 | 25 | 30 | 32 | 33 | 36 | 32 | 30 | 19 | 13 | - |
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| Provision for retirement benefits for directors (and other officers) | 9 | 9 | 13 | 8 | 8 | 9 | 9 | 10 | 10 | 5 | 6 | - |
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| Salaries and bonuses | 294 | 344 | 369 | 386 | 397 | 446 | 493 | 505 | 513 | 593 | 590 | - |
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| Provision for bonuses | 12 | 18 | 18 | 21 | 21 | 26 | 29 | 22 | 24 | -24 | - | - |
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| Retirement benefit expenses | 5 | 13 | 18 | 15 | 19 | 18 | 18 | 24 | 23 | 34 | 41 | - |
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| Provision of allowance for doubtful accounts | -2 | 0 | -0 | 1 | 4 | 2 | 1 | -2 | 0 | -1 | -0 | - |
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| Selling, general and administrative expenses | 910 | 1,061 | 1,096 | 1,134 | 1,204 | 1,299 | 1,443 | 1,455 | 1,405 | 1,458 | 1,470 | 1,602 |
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| Selling, general and administrative expenses | 910 | 1,061 | 1,096 | 1,134 | 1,204 | 1,299 | 1,443 | 1,455 | 1,405 | 1,458 | 1,470 | 1,602 |
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| Operating profit (loss) | 251 | 459 | 538 | 604 | 609 | 736 | 748 | 709 | 669 | 886 | 957 | 1,015 |
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| Interest income | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
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| Dividend income | 3 | 3 | 4 | 5 | 5 | 6 | 5 | 5 | 4 | 4 | 5 | 6 |
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| Rental income | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 |
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| Rental income | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 |
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| Insurance claim income | - | - | - | - | - | - | - | - | - | - | - | 10 |
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| Foreign exchange gains | - | - | - | - | - | - | 0 | 1 | - | 3 | 8 | - |
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| Other | 4 | 1 | 1 | 0 | 2 | 2 | 3 | 2 | 5 | 3 | 2 | 4 |
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| Subsidies for employment adjustment and other | - | - | - | - | - | - | - | 7 | 15 | 6 | - | - |
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| Non-operating income | 16 | 14 | 23 | 20 | 16 | 16 | 16 | 22 | 30 | 23 | 21 | 28 |
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| Other | 4 | 1 | 1 | 0 | 2 | 2 | 3 | 2 | 5 | 3 | 2 | 4 |
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| Non-operating income | 16 | 14 | 23 | 20 | 16 | 16 | 16 | 22 | 30 | 23 | 21 | 28 |
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| Interest expenses | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 |
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| Rental expenses on real estate | 5 | 4 | 4 | 4 | 4 | 5 | 3 | 3 | 3 | 3 | 4 | 3 |
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| Non-operating expenses | 13 | 11 | 6 | 5 | 5 | 6 | 3 | 3 | 4 | 4 | 4 | 20 |
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| Ordinary profit (loss) | 254 | 462 | 555 | 619 | 620 | 746 | 761 | 728 | 695 | 906 | 973 | 1,023 |
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| Gain on sale of non-current assets | - | - | - | - | - | - | - | - | - | 1 | - | 0 |
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| Surrender value of insurance policies | - | - | - | - | - | - | - | - | - | 42 | 1 | - |
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| Gain on liquidation of subsidiaries and associates | - | - | - | - | - | - | - | - | - | - | 8 | - |
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| Insurance claim income | - | - | - | - | - | - | - | - | - | - | 41 | - |
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| Surrender value of insurance policies | - | - | - | - | - | - | - | - | - | 42 | 1 | - |
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| Gain on liquidation of subsidiaries and associates | - | - | - | - | - | - | - | - | - | - | 8 | - |
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| Insurance claim income | - | - | - | - | - | - | - | - | - | - | 41 | - |
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| Extraordinary income | 14 | - | 29 | 9 | - | 30 | - | - | 62 | 43 | 50 | 0 |
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| Extraordinary income | 14 | - | 29 | 9 | - | 30 | - | - | 62 | 43 | 50 | 0 |
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| Loss on retirement of non-current assets | 0 | 1 | 1 | - | 0 | 0 | - | 1 | 0 | 0 | 1 | 15 |
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| Loss on sale of investment securities | 46 | - | - | - | - | - | - | - | 15 | 1 | - | - |
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| Retirement benefits for directors (and other officers) | - | - | - | - | - | - | - | - | - | 119 | - | - |
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| Loss on recall issue | - | - | - | - | - | - | - | - | - | 41 | - | - |
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| Loss on liquidation of subsidiaries and associates | - | - | - | - | - | - | - | - | - | 46 | - | - |
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| Extraordinary losses | 48 | 34 | 113 | - | 0 | 0 | - | 43 | 15 | 207 | 1 | 26 |
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| Profit (loss) before income taxes | 220 | 428 | 471 | 628 | 619 | 777 | 761 | 685 | 742 | 742 | 1,022 | 998 |
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| Income taxes - current | 66 | 225 | 170 | 218 | 191 | 254 | 245 | 249 | 252 | 201 | 325 | 339 |
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| Income taxes - deferred | 43 | -25 | -7 | -1 | 0 | 8 | -8 | -10 | -23 | 9 | 14 | -3 |
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| Income taxes | 109 | 200 | 162 | 217 | 191 | 262 | 238 | 239 | 229 | 210 | 339 | 336 |
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| Profit (loss) | - | - | 309 | 411 | 428 | 515 | 523 | 446 | 513 | 532 | 683 | 661 |
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| Profit (loss) attributable to owners of parent | - | - | 309 | 411 | 428 | 515 | 523 | 446 | 513 | 532 | 683 | 661 |
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