| 1960-09 |
Established with 100% investment from Shinetsu Chemical Corporation. Capital: 45 million yen. |
| 1960-09-15 |
Established on September 15, 1960 (Showa 35). |
| 1961-04 |
Construction of Tokyo factory in Omiya City, Saitama Prefecture (now Saitama City). |
| 1961-07 |
Capital increased to 150 million yen. |
| 1962-08 |
Capital increased to 300 million yen. |
| 1963-06 |
Opened Osaka, Nagoya, and Fukuoka branches. |
| 1963-09 |
The Crown Prince (now Emperor Emeritus) visited the Tokyo factory and inspected the plant. |
| 1964-02 |
Capital increased to 500 million yen. |
| 1965-01 |
Capital increased to 800 million yen. |
| 1965-02 |
Established a product research institute. |
| 1966-07 |
Established Shinetsu Unit Co., Ltd. |
| 1967-05 |
Capital increased to 1.6 billion yen. |
| 1968-01 |
Opened a sales office in Sapporo. |
| 1969-12 |
Established Urawa Polymer Co., Ltd. |
| 1970-04 |
Constructed Nanyo Factory in Shinnan-yō City, Yamaguchi Prefecture (now: Shūnan City). |
| 1970-04 |
Opened a sales office in Hiroshima. |
| 1971-09 |
Established Sun Ace Co., Ltd. |
| 1973-12 |
Established Shinanō Polymer Co., Ltd. |
| 1974-01 |
Established Niigata Polymer Co., Ltd. |
| 1974-03 |
Opened a sales office in Niigata. |
| 1974-10 |
Opened a Tohoku branch in Sendai City, Miyagi Prefecture. |
| 1975-11 |
Established Polymer Chemical Products Co., Ltd. |
| 1981-02 |
Capital increased to 1.8 billion yen. |
| 1981-12 |
Established Shin-Etsu Polymer America, Inc. in the United States. |
| 1983-12 |
Listed on the Second Section of the Tokyo Stock Exchange. Capital increased to 2.67 billion yen. |
| 1985-03 |
Capital increased to 4.27 billion yen. |
| 1985-09 |
Designated as a stock on the First Section of the Tokyo Stock Exchange. Completed a research and development center within the Tokyo factory. |
| 1986-06 |
Established Shin-Etsu Polymer Europe B.V. in Europe. |
| 1988-10 |
Started corporate identity (CI) for 81 companies in the Shin-Etsu Group. Established Shin-Etsu Polymer (Malaysia) Sdn. Bhd. |
| 1989-03 |
Constructed Kodama Factory. |
| 1989-04 |
Established Polymer East Japan Co., Ltd. |
| 1990-10 |
Opened Morioka Sales Office. |
| 1992-04 |
Opened Nagano Sales Office. |
| 1993-04 |
Opened Singapore Branch. |
| 1993-10 |
Established Suzhou Shin-Etsu Polymer Co., Ltd. |
| 1994-04 |
Opened Hong Kong Branch. Established Engineering Technology Research Institute. |
| 1995-04 |
Opened Shizuoka Sales Office. |
| 1996-02 |
Opened an office in Atlanta, USA. |
| 1996-07 |
Established Shin-Etsu Polymer Mexico, S.A. de C.V. in Mexico. |
| 1996-07 |
Opened McAllen warehouse of Shin-Etsu Polymer America, Inc. |
| 1997-11 |
Established PT. Shin-Etsu Polymer Indonesia in Indonesia. |
| 1998-11 |
Established a development center in Kodama. |
| 1999-01 |
Established Shin-Etsu Polymer (Shanghai) Co., Ltd. in Shanghai. |
| 1999-10 |
Opened an office in Detroit, USA. |
| 2001-05 |
Announced the new management plan [New KSK]. |
| 2001-10 |
Completed the second factory of Suzhou Shin-Etsu Polymer Co., Ltd. |
| 2001-10 |
Completed the second building of the second factory in Malaysia. |
| 2002-04 |
Reorganized from a 7-business headquarters system to a new 3-business headquarters system. |
| 2002-04 |
Established a research institute in Kodama. |
| 2003-06 |
Transitioned to a new structure of the R&D Center. |
| 2003-10 |
Established Shin-Etsu Polymer Hungary Kft. in Hungary. |
| 2004-04 |
Polymer East Japan Co., Ltd. and Polymer Chemical Products Co., Ltd. merged. Shin-Etsu Fine Tech Co., Ltd. was established. |
| 2004-05 |
The No. 4 factory of Niigata Polymer was completed. |
| 2005-07 |
From a branch to a local subsidiary. Established Shin-Etsu Polymer Hong Kong Co., Ltd. |
| 2005-08 |
From a branch to a local subsidiary. Established Shin-Etsu Polymer Singapore Pte. Ltd. |
| 2007-10 |
Established Shin-Etsu Polymer India Pvt. Ltd. in India. |
| 2011-04 |
Established Dongguan Shin-Etsu Polymer Co., Ltd. in China. |
| 2012-04 |
Shin-Etsu Fine Tech Co., Ltd. absorbed Shin-Etsu Unit Co., Ltd. |
| 2012-06 |
Established the Technology Development Headquarters. |
| 2014-02 |
Established Shin-Etsu Polymer (Thailand) Ltd. |
| 2014-04 |
Discontinued the business division system and reorganized into functions such as President's Office, Sales Headquarters, Technology and Production Headquarters, and Management Headquarters. |
| 2016-02 |
Established Shin-Etsu Polymer Vietnam Co., Ltd. |
| 2016-04 |
Reorganized the Technology and Production Headquarters into Development Headquarters and Production Headquarters. |
| 2017-04 |
Shin-Etsu Polymer Co., Ltd. absorbed Shinoha Polymer Co., Ltd., Niigata Polymer Co., Ltd., Urawa Polymer Co., Ltd., and Sun Ace Co., Ltd. Established Shiojiri Factory, Nagano Branch Factory, and Itoigawa Factory. |
| 2019-01 |
Made Hymix Co., Ltd. (Thailand) a subsidiary. |
| 2021-08 |
Made Kitchenista Co., Ltd. a subsidiary. |
| 2022-04 |
Transitioned the Tokyo Stock Exchange market to the Prime Market. |
| 2022-06 |
Established Shin-Etsu Polymer Taiwan Co., Ltd. |
| 2023-05 |
Published the medium-term management plan "Shin-Etsu Polymer Global & Growth 2027". |
| 2023-11 |
Transferred the vinyl chloride pipe business including Nanyo Factory to Sekisui Chemical Co., Ltd. and others. |
| 2025-04 |
Absorbed Kitchenista Co., Ltd. |
