|1954||May||Established Onishi Seisakusho in Yaguchi-machi, Ota-ku, Tokyo (Founder: Yukio Onishi).|
|1956||November||Relocated to newly-built plant in Shimomaruko, Ota-ku, Tokyo. Reformed the organization and changed name to Onishi Seiki Kogyo (Capital: \500,000).|
|1957||June||Developed technology to produce bellows-type thermostats.|
|1961||February||Built and relocated to comprehensive plant in Kiyose-shi, Tokyo in line with rapid growth in the automobile industry.|
|1967||March||Developed pressure-resistant wax-type thermostats to replace bellows-type thermostats to improve cooling performance in engines.|
|1968||May||Constructed new main plant.|
|Remodeled main corporate building.
Changed company name to Nippon Thermostat Co., Ltd.
|1973||June||Constructed Kiyose Plant in Kiyose, Tokyo.|
|1977||November||Constructed Yorii Plant in Yorii-machi, Osato-gun, Saitama.|
|1978||March||Separated Yorii Plant and established it as NTC Industry Co., Ltd. Extended buisiness into housing and electical appliances fields.|
|1981||December||Constructed new main plant and established technology research institute.|
|1986||November||Constructed north plant beside main plant.|
|1989||May||Constructed Shioya Plant in Shioya-machi, Shioya-gun, Tochigi.|
|1994||August||Inaugurated a joint venture, Nippon Thermostat (India) Limited, in India.|
|Installed engine bench in Shioya Plant and constructed new building.
Obtained ISO 9001 certification.
|2001||May||Installed chassis dynamo in Shioya Plant and constructed new building.|
|2002||July||Inaugurated an overseas affiliate, Nippon Thermostat of America Corporation, in West Virginia, U.S.|
|2003||May||Obtained ISO-14001 certification.|
|2004||June||Merged the back-office section of NTC Industry Co., Ltd.|
|2005||June||Constructed Nippon Thermostat of America Corporaton, North America Plant.|
|2008||February||Inaugurated Shiojiri Plant (resin molding plant) in Shiojiri, Nagano.|
|2009||May||Made NTC Industry Co., Ltd. a wholly-owned subsidiary.|
|2009||October||Inaugurated Shioya Second Plant in Shioya-machi, Shioya-gun, Tochigi.|
|2013||August||Inaugurated an overseas affiliate, Nippon Thermostat Vietnam Co., Ltd., in Vietnam.|
|2018||April||Merged NTC Industry Co., Ltd.|
|2019||February||Constructed New Head Office building in Kiyose-shi, Tokyo.|
|2019||May||Constructed Yorii Second Plant in Yorii-mach, Osato-gun, Saitama|