Founded in Nagoya in 1936, NGK Spark Plug Co., Ltd.—now operating as Niterra—has led spark plug innovation for nearly a century. Initially focused on ignition components, the company rapidly expanded with US manufacturing by 1966 followed by Iridium plugs in 1997, ceramic glow plugs, and oxygen sensors—solidifying its global OEM status. 

Today, NGK designs and manufactures precision spark plugs, ignition coils, oxygen and temperature sensors, and technical ceramics through its NTK label. Their products power top-tier OEMs like Toyota, Honda, BMW, Ford—and support elite motorsports programs including Scuderia Ferrari in Formula 1, IndyCar, MotoGP, WRC, and Dakar Rally.

With over 15,900 employees and multiple global production sites, NGK continues advancing ignition and sensor technology—now also focusing on applications for electrified and hybrid vehicles. Combining deep R&D, ISO-quality standards, and motorsport-proven performance, NGK/Niterra remains a trusted name for reliable ignition and precision sensing—on both the street and the track.