Thermostats control the temperature of engine coolane. This is one of the most important parts to constantly maintain the engine at the temperature at which the engine can display its optimal performance. Thermostats determine the engine performance as well as the environmental load that results from fuel consumption and exhaust gas, and in the end impact the overall performance of the vehicle. Thermostats for which we hold the top chare in Japan can very well be said to be a product that is the \"face\" of Nippon Thermostat.