History
| 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. |
| June 1981 |
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. |
| September 2005 |
ISO 9001/2000 certification acquired. |
| November 2005 | Kamiguchi 1st factory established in Kamiguchi, Misato City, Saitama Prefecture. |
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October 2007 |
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. |
| November 2013 |
