|1966||Established in Tendo City, Yamagata Prefecture (Japan) as a speaker manufacturing plant through the capital contribution of Pioneer Corporation.|
|1974||Begins car stereo production for Pioneer Corporation.
Builds a press factory for parts production.
|1981||Constructs Yonezawa Plant to launch labor-saving speaker assembly operations.|
|1984||Begins factory automation (FA) systems production and marketing.|
|1985||Obtains N.I.V. (no inspection validation) from General Motors, U.S.A.|
|1988||Enters North American market. (Establishes a U.S. sales subsidiary)
Begins electronic accessory business.
|1989||Launches production at the manufacturing subsidiary in Mexico.|
|1993||Obtains ISO 9001 certification for Tendo Plant and ISO 9002 certification for Yonezawa Plant.|
|1995||Launches production at the manufacturing subsidiaries in Thailand and China.|
|1997||Establishes a subsidiary in Hong Kong to procure parts and materials from Asian suppliers.
Succeeds in the world's first mass production of OLED displays.
Obtains QS-9000 certification for HQs, Tendo Plant, Yonezawa Plant and manufacturing subsidiaries.
|1998||Builds FA Management Office and Precision Molding Center.|
|1999||Begins mass production of OLED displays for car stereos.
Obtains ISO 14001 certification for HQs, Tendo Plant and Yonezawa Plant.
|2000||Listed on the Second Section of Tokyo Stock Exchange.
Starts supplying OLED displays for Motorola mobile phones.
|2002||Accepts the transfer of optical disc production system business from Pioneer Video Corporation.|
|2003||Obtains ISO/TS 16949 certification for quality management systems.|
|2004||Builds an annex to FA facilities in Tendo, Japan.
Establishes new FA office and facilities in Shanghai, China.
|2005||Establishes a manufacturing subsidiary in Vietnam.|
|2007||Delisted from the Second Section of Tokyo Stock Exchange due to TOB by Pioneer Corporation.|
|2011||Tohoku Pioneer EG Corporation is newly launched for FA business.|
|2015||Mogami Denki Corporation, one of the affiliates, establishes a manufacturing subsidiary in Vietnam.|
|2017||Establishes a manufacturing subsidiary (TPMX) in Mexico.|
|2018||Transfers all stocks of Tohoku Pioneer EG Corporation to DENSO Corporation.|
|2019||Transfers all stocks of Piotech Corporation to NIPRO Corporation.|