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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.

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