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NGK spark plugs: standard on the left iridium on the right

NGK Spark Plugs Co., Ltd. (日本特殊陶業株式会社, Nippon Tokushu Tōgyō Kabushiki-gaisha) is a public company established in 1936 and based in Nagoya, Japan. NGK manufactures and sells spark plugs and related products for internal combustion engines, along with ceramics and applicable products.

As of March 2007, the company employed 10,407 people,[1] and operated a network of 7 liaison offices, 12 sales offices, 13 production sites and 2 technical centers worldwide.[2][2] NGK Spark Plugs was founded as a spin-off of the spark plug division of NGK Insulators.[3] Originally, NGK supplied most of its products to Japanese automakers. Today the company is the largest OEM sparkplug maker in the world.[citation needed]

NGK stands for Nippon (Japan) Gaishi (insulator) Kaisha (company).

Micro combined heat and power[edit]

NGK is a manufacturer of SOFC fuel cell micro combined heat and power units in the range 700W - 1 Kw.[4]


United States[edit]

Established in 1966 - NGK Spark Plugs (USA), Inc. was founded as a subsidiary of NGK Spark Plug Co, Ltd., of Japan. Its corporate headquarters was first located in California and then moved to its current location in Wixom, Michigan. The company produces spark plugs in Irvine, California, and produces both spark plugs and oxygen sensors in Sissonville, West Virginia.

In early October 2008 NGK launched a social networking site called "Art of Fast",[5] which was later redirected to a Facebook page of the same name.


NGK established its first European subsidiary, NGK Spark Plugs (U.K.) Ltd. in 1975. Four years later NGK Spark Plug Europe GmbH in Germany was the next European subsidiary, in Ratingen, Germany.[6] The first technology center outside Japan started operation in Ratingen, Germany in 1990.[6] In 1991 NGK opened NGK Spark Plug Industries Europe S.A.S., in Orléans, France - its first European production facility.[6]

Since 2000, NGK Spark Plug Europe in Ratingen operates its own logistics center. It has a plant with 6,000 m2 (65,000 sq ft) of surface area and produces 25 million spark plugs as well as glowplugs for diesel motors.


In December 2017, the company announced it will shift its focus towards solid-state batteries, utilizing its ceramics expertise.[7] The company said it is shifting its focus, due to an anticipated shift to EVs in the future that could turn its spark plug and oxygen sensor operations obsolete.[7]

Motorsports involvement[edit]

NGK Spark Plugs are also used by a variety of Formula One teams including Ferrari, McLaren, Sauber, Force India and Scuderia Toro Rosso. NGK Spark Plugs was exclusive spark plug supplier for IndyCar Series since 2007 until 2011. But in 2012 until present, NGK only supplied for Honda-powered IndyCar Series teams. NGK Spark Plugs currently exclusive spark plug supplier for MotoGP, Moto2, Moto3 and Superbike World Championship for motorcycle racing category.


External links[edit]