Domestic sites Company Certified site Registration certificate Certification date Ferrotec Material Technologies Corporation Chiba plant ISO14001 certificate picture_as_pdf PDF [130KB] December 2004 Toyo Knife Co., Ltd. Headquarter ISO14001 certificate picture_as_pdf PDF [2.2MB] March 2024
Overseas sites Region Company Certification date Asia Hangzhou Dahe Thermo-Magnetic Electronics Co., Ltd. April 2001 Asia Shanghai Shenhe Thermo-Magnetic Electronics Co., Ltd. March 2000