Asia, Australia
Japan
- NGK INSULATORS, LTD.
- ENERGY SUPPORT CORPORATION
- AKECHI INSULATORS CO., LTD.
- NGK CHEMITECH, LTD.
- NGK FILTECH, LTD.
- NGK ADREC CO., LTD.
- NGK KILNTECH CORPORATION
- NGK OKHOTSK, LTD.
- SOSHIN ELECTRIC CO., LTD.
- NGK ELECTRONICS DEVICES, INC.
- NGK CERAMIC DEVICE CO., LTD.
- NGK METEX CORPORATION
- NGK FINE MOLDS, LTD.
China
Korea
- NGK AUTOMOTIVE CERAMICS KOREA CO., LTD.
Indonesia
- P.T. NGK CERAMICS INDONESIA
Thailand
- SIAM NGK TECHNOCERA CO., LTD.
- NGK CERAMICS (THAILAND) CO., LTD.
Australia
North America, Central America
United States of America(USA)
- NGK-LOCKE INC.
- NGK CERAMICS USA, INC.
- NGK AUTOMOTIVE CERAMICS USA, INC.
- FM INDUSTRIES, INC.
- NGK ELECTRONICS USA, INC.
- NGK METALS CORPORATION
Canada
- NGK INSULATORS OF CANADA, LTD.
Mexico
- NGK CERAMICS MEXICO, S. DE R. L. DE C. V.
Europe, Africa
United Kingdom
Belgium
France
Republic of South Africa
- NGK CERAMICS SOUTH AFRICA (PTY) LTD.