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June 2000 | ISO9001 certification (JET‐0296)/ Houwa Kogyo Co., Ltd. Toyohashi Plant |
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August 2002 | ISO14001 certification (E02‐275)/ Houwa Kogyo Co., Ltd. Toyohashi Plant |
June 2006 | ISO9001 certification (JET‐0296)/ Houwa Kogyo Co., Ltd. Hamamatsu Plant |
July 2007 | ISO14001 certification (E02‐275)/ Houwa Kogyo Co., Ltd. Hamamatsu Plant |
3-15-20 Rokuban, Atsuta-ku, Nagoya-shi, Aichi-ken, Japan 456-0058