NGK Insulators, Ltd., together with its subsidiaries, manufactures and sells electric power related equipment in Japan, North America, Europe, and Asia.

The company operates through Environment Business, Digital Society Business, and Energy & Industry Business segments.

It offers energy storage systems, including NAS batteries; suspension, long rod, station post, hollow, and pin post insulators; HONEYCERAM, a component for exhaust gas purification; diesel particulate filters that eliminates particulates in the exhaust gas emitted from diesel automobiles; and NOx sensors, which measures nitrogen oxide concentration in motor vehicle exhaust gas.

The company also provides metal-related products, such as beryllium copper products, copper-nickel-tin alloy products, molds, and related parts; and various electronic components, such as piezoelectric micro actuators, high frequency components, and mold-cast ceramics, as well as EnerCera, a chip-type ceramic rechargeable battery.

In addition, it offers ceramics for semiconductor manufacturing equipment, including ceramic heaters, electrostatic chucks, and components; and industrial process products, such as heating systems, kiln furniture and refractories, ceramic membranes and separators, glass-lining products, high temperature dust collectors, ceramic and vacuum pumps, radioactive waste treatment equipment, and gas analyzers, as well as C1 home-use water Purifiers.

The company was incorporated in 1919 and is headquartered in Nagoya, Japan.