Asia, Australia
Japan
China
- NGK INSULATORS (CHINA) INVESTMENT CO., LTD.
- NGK CERAMICS SUZHOU CO., LTD.
- NGK TECHNOCERA SUZHOU CO., LTD.
Korea
- NGK AUTOMOTIVE CERAMICS KOREA CO., LTD.
Indonesia
- P.T. NGK CERAMICS INDONESIA
Thailand
- NGK CERAMICS (THAILAND) CO., LTD.
- SIAM NGK TECHNOCERA CO., LTD.
Australia
North America, Central America
United States of America(USA)
- NGK-LOCKE INC.
- NGK CERAMICS USA, INC.
- NGK AUTOMOTIVE CERAMICS USA, INC.
- NGK ELECTRONICS USA, INC.
- FM INDUSTRIES, INC.
- NGK METALS CORPORATION
Canada
- NGK INSULATORS OF CANADA, LTD.
Mexico
- NGK CERAMICS MEXICO, S. DE R. L. DE C. V.