NGK SPARK PLUG CO., LTD. engages in the manufacture and sale of spark plugs, technical ceramics, and related products for internal combustion engines. It operates through the following segments: Automotive, Technical Ceramics, and Others. The Automotive segment deals with the manufacture and sale of spark plugs, glow plugs, automotive sensors, ceramic engine parts, and other automotive components. The Technical Ceramics segment handles both semiconductor and ceramics divisions that manufacture and sell semiconductors, various device packages, multi-layer circuit boards, cutting tools, industrial equipment parts, and semiconductor manufacturing equipment items. The Others segment includes environmental energy and medical fields, material sales, and welfare services. The company was founded on October 26, 1936 and is headquartered in Nagoya, Japan.