Initially, the company, founded in 1954, was named Kitahara Seisakusho, and only later it came to be called HKT Corporation. Under the brand not only heating plugs are produced, but also hydraulic solenoid valves, ignition switches, thermostats, fuel pumps, temperature and pressure sensors, fuel solenoid valves, radiator caps, wipers for windows and air solenoid high pressure valves designed for trucks. Quality products of HKT Corporation are successfully sold in more than a hundred countries.