|November 1970||Established as Eco Denka in Katsushika-ku, Tokyo.|
|December 1973||Incorporated as Eco Denka Co., Ltd.|
|May 1975||Head office building relocated to Horikiri in Katsushika-ku, Tokyo.|
Head office relocated again to Shinwa in Saitama prefecture.Company name changed to Shinwa Eco Co., Ltd.
|April 1993||Japanese characters of Shinwa Eco Co., Ltd. company name changed.|
ISO 9001/2000 certification acquired.
|November 2005||Kamiguchi 1st factory established in Kamiguchi, Misato City, Saitama Prefecture.|
|Kamiguchi 2nd factory established in Kamiguchi, Misato City, Saitama Prefecture.|
|January 2008||ISO 14001/2004 certification acquired.|
|June 2009||Completely chrome-free ZEC coat mass production facility introduced.|
|November 2011||Thai Shinwa Echo Co., Ltd. established in Thailand.|
|March 2013||Operation of Thai factory started.|