Niterra. 

Niterra Co., Ltd., originally founded as NGK Spark Plug Co., Ltd. in Nagoya, Japan, in 1936, is a global manufacturer operating through its subsidiaries. The company's primary business revolves around the production and sale of spark plugs and related components for internal combustion engines. Its engine-related offerings span spark plugs for both original equipment manufacturers (OEMs) and the aftermarket, along with specialized igniter plugs and associated resistor cables and covers. The company also supplies various glow plugs, including ceramic and metal types, complete with their controllers. Furthermore, Niterra produces critical sensors such as oxygen, NOx, temperature, and knock sensors. Beyond ignition systems, Niterra is a prominent producer of technical ceramics and an array of advanced components. This includes diverse fine ceramic products utilized in wear-resistant applications, ultrasonic transducers, semiconductor manufacturing equipment, and electrical components. The company further specializes in semiconductor packages and substrates, offering IC packages for electronics and smart devices, alongside manufacturing parts for the semiconductor industry. Rounding out its extensive product line are medical devices and a comprehensive range of cutting tools. These tools feature various material grades, including ceramic, cermet, micro grain carbide, coated carbide, and cubic boron nitride (CBN), in both solid state (SS) and rotational designs. Strategically, the company leverages two key brands: NGK is reserved for its spark and glow plugs, while its advanced sensor technologies, semiconductor packages and substrates, cutting tools, and fine ceramics are all marketed under the NTK brand.