| 1934 | Company was established. | |
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| 1958 | Re-organized to incorporation. | |
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| 1958 | Started Secondary Aluminium works. |  |
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| 1961 | Opend new plant. (present Head Office & Plant) |  |
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| 1980 | Ministry of International Trade & Industry permitted the use of JIS mark on products. | |
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| 2003 | Attainment of ISO 9001:2000 certification | |
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| 2009 | Attainment of ISO 9001:2008 certification |  |
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| 2012 | Opend new plant. (Nakabata plant) | |
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