|September 1960||Founded as 100% subsidiary of Shin-Etsu Chemical Co.,Ltd.|
|April 1961||Established Tokyo Plant in Omiya, Saitama Prefecture.|
|July 1961||Increased Capital to 150 Million Yen.|
|August 1962||Increased Capital to 300 Million Yen.|
|June 1963||Opened Osaka Branch, Nagoya Branch and Fukuoka Branch.|
|September 1963||The Honorable Prince Akihito (Majesty the Emperor Emeritus) visited Tokyo Plant.|
|February 1964||Increased Capital to 500 Million Yen.|
|January 1965||Increased Capital to 800 Million Yen.|
|February 1965||Established Product Research Center.|
|July 1966||Established Shin-Etsu Unit Co., Ltd.|
|May 1967||Increased Capital to 1.6 Billion Yen.|
|January 1968||Opened Sapporo Office.|
|December 1969||Established Urawa Polymer Co., Ltd.|
|April 1970||Established Nanyo Plant in Yamaguchi Prefecture.|
|September 1971||Established SAN-ACE, Co., Ltd.|
|November 1972||Established Polymer East Japan Co., Ltd.|
|December 1973||Established Shinano Polymer Co., Ltd.|
|January 1974||Established Niigata Polymer Co., Ltd.|
|October 1974||Opened Sendai Office.|
|November 1975||Established Polymer Chemicals Co., Ltd.|
Memorial truck with decoration of "congratulating of initial product shipment" carried corrugated sheets.
The Honorable Prince Akihito(Majesty the Emperor Emeritus) visited Tokyo Plant and impressed plastics fabricating processes.
|February 1981||Increased Capital to 1.8 Billion Yen.
Established Shin-Etsu Polymer America, Inc.
|December 1983||Listed Tokyo Stock Exchange's Second Section.
Increased Capital to 2.67 Billion Yen.
|March 1985||Increased Capital to 4.227 Billion Yen.|
|September 1985||Listed Tokyo Stock Exchange First Section.
Established Research & Development(R&D) Center at Tokyo Plant.
|June 1986||Established Shin-Etsu Polymer Europe B.V. in Netherlands.|
|October 1986||81 of Shin-Etsu Group companies started New Corporate Identity (CI).|
|October 1988||Established Shin-Etsu Polymer (Malaysia) Sdn. Bhd.|
|March 1989||Established Kodama Plant in Saitama Prefecture.|
|April 1992||Opened Nagano Office.|
|April 1993||Opened Singapore Branch.|
|October 1993||Established Suzhou Shin-Etsu Polymer Co., Ltd. in China.|
|April 1994||Opened Hong Kong Branch.
Established Engineering & Technical Institute.
|February 1996||Opened Shin-Etsu Polymer America, Inc.'s Atlanta Branch.|
|July 1996||Established Shin-Etsu Polymer Mexico, S.A. de C.V. in Reynosa, Mexico.
Opened Shin-Etsu Polymer America, Inc.'s McAllen Distribution Center.
|November 1997||Established P.T. Shin-Etsu Polymer Indonesia in Jakarta, Indonesia.|
|November 1998||Established Kodama R&D Center.|
|January 1999||Established Shin-Etsu Polymer Shanghai Co., Ltd.|
|October 1999||Opened Shin-Etsu Polymer America, Inc.'s Detroit Sales Office.|
|May 2001||Launched "New KSK" Corporate Management Strategy Plan.|
|October 2001||Established Second Plant of Suzhou Shin-Etsu Polymer, China.
Established Second Building of No. 2 Plant at Shin-Etsu Polymer
Opened Chugoku Office in Yamaguchi Prefecture.
|April 2002||Reorganization started from 7 to 3 business departments.
Established Kodama Research Institute.
|September 2003||Reorganized corporate's R&D Center.|
|October 2003||Established Shin-Etsu Polymer Hungary Kft.|
|April 2004||Merged Polymer East Japan CO., LTD. and Polymer Chemicals Co., Ltd. and established Shin-Etsu Fintech Co., Ltd.|
|May 2004||Established No.4 Plant of Niigata Polymer Co., Ltd.|
|July 2005||Established Shin-Etsu Polymer Hong Kong Co., Ltd.|
|August 2005||Established Shin-Etsu Polymer Singapore Pte. Ltd.|
|October 2005||Established Shin-Etsu Polymer India Pvt. Ltd.|
|April 2011||Established Dongguan Shin-Etsu Polymer Co., Ltd.|
|April 2012||Shin-Etsu Finetech Co., Ltd. merged with Shin-Etsu Unit Co., Ltd.|
|June 2012||Reorganized corporate's Technology Development Headquarters.|
|February 2014||Established Shin-Etsu Polymer (Thailand) Ltd.|
|April 2014||Abolished business unit-based organization and reorganized into a function-based organization|
|February 2016||Shin-Etsu Polymer Vietnam Co., Ltd. established|
|April 2016||Reorganized the Technology & Production Unit into the Development Unit and the Production Unit|
|April 2017||Shin-Etsu Polymer Co.,Ltd. merged with Shinano Polymer Co., Ltd. , Niigata Polymer Co., Ltd. , Urawa Polymer Co., Ltd. and SAN-ACE Co., Ltd.
Established Shiojiri Plant,Nagano Branch and Itoigawa Plant
|January 2019||Shin-Etsu Polymer Co., Ltd. acquired 100% ownership of Hymix Co., Ltd. in Thailand.|