The company, headquartered in Marunouchi, Chiyoda-ku, Tokyo, is the company with the largest market capitalization and operating profit among domestic chemical manufacturers and also the largest global market share for polyvinyl chloride, semiconductor silicon, and photomask substrates.
“Shin-Etsu” in the company's name derives from Shin'etsu Region, where the company established the first chemical plant as Shin-Etsu Nitrogen Fertilizer in 1926.
The company's milestones:
- In 1926: Shin-Etsu Nitrogen Fertilizer Co., Ltd. established.
- In 1927: Naoetsu Plant Constructed.
- In 1938: First Facility of Today’s Gunma Complex established.
- In 1940: Name Changed to Shin-Etsu Chemical Co., Ltd.
- In 1945: Takefu Plant Constructed
- In 1949: Shares Listed on Tokyo Stock Exchange.
- In 1953: Silicone Production Facilities Established.
- In 1955: Nissin Chemical Industry Co., Ltd. established
- In 1956: PVC Production begins.
- In 1957: Caustic Soda and Chlorine Production begins.
- In 1959: Chloromethane Production begins.
- In 1960: Shin-Etsu Polymer Co., Ltd. established and Siles S.A. in Portugal to manufacture and sell vinyl chloride resin.
- In 1962: TShin-Etsu Astech Co., Ltd. established and began manufacture of Cellulose Derivatives.
- In 1964: Nagano Electronics Industrial Co., Ltd. established.
- In 1967: Shin-Etsu Metallurgical Co., Ltd., established and began produce High-Purity Yttrium and Other Rare Earth.
- In 1968: Established Kashima Vinyl Chloride Monomer Co., Ltd., Kashima Chlorine & Alkali Co., Ltd. and Shin-Etsu Vinyl Acetate Co., Ltd.
- In 1969: Naoetsu Electronics Co., Ltd. established.
- In 1970: Kashima Plant constructed.
- In 1972: Shin-Etsu Quartz Products Co., Ltd. established.
- In 1973: Shintech, Inc. (Mỹ) and SEH Malaysia Sdn. Bhd established.
- In 1976: Shin-Etsu Engineering Co., Ltd. established. PVC & Polymer Materials Research Center (Formerly PVC Research Center) and Silicone-Electronics Materials Research Center established.
- In 1977: Specialty Chemicals Research Center and Magnetic Materials Research Center established.
- In 1979: Shin-Etsu Handotai America, Inc. (S.E.H. America) established.
- In 1984: Shin-Etsu Handotai Shirakawa Plant constructed; Shin-Etsu Handotai Europe, Ltd. (S.E.H. Europe) established.
- In 1985: K-Bin, Inc. (U.S.A.) and Shin-Etsu Silicones of America, Inc. established.
- In 1986: Shin-Etsu Silicone Korea Co., Ltd. established.
- In 1987: Shin-Etsu Silicone Taiwan Co., Ltd. established.
- In 1988: Advanced Functional Materials Research Center established.
- In 1989: Shin-Etsu Silicones Europe BV (The Netherlands) và MicroSi, Inc. (U.S.A.) established.
- In 1990: Shin-Etsu International Europe BV (The Netherlands) và Shin-Etsu Singapore Pte. Ltd. established.
- In 1992: Matsuida Plant of Gunma Complex constructed.
- In 1996: Acquisition of Simcoa Operations Pty. Ltd. (Australia).
- In 1999: A Dutch PVC Business Purchased and Shin-Etsu PVC B.V. established.
- In 2003: Shin-Etsu Silicone International Trading (Shanghai) Co., Ltd. established.
- In 2005: JAPAN VAM & POVAL Co. Ltd. became a wholly owned Shin-Etsu Group Company
- In 2009: Silicone Reflector Material for High Brightness LEDs and Wavelength Conversion Silicone Film Developed.

- In 2010: Shin-Etsu Magnetic Materials Vietnam Co., Ltd. and Shin-Etsu Electronics Material established.
- In 2012: Shin-Etsu (Changting) Technology Co., Ltd. established.
- In 2013: A High Refractive Index Silicone Encapsulating Material and Silicone-based Mounting Board for High-brightness LEDs Developed.
- In 2015: Shin-Etsu YOFC (Hubei) Optical Preform Co.,Ltd. established.
- In 2021: Silicone Thermal Interface Materials for Applications in Electric Vehicles and Hybrid Electric Vehicles Developed
- In 2022: Mass Production System for GaN (Gallium Nitride) Epitaxial Growth Substrates and Its Related Products Expanded.
According to en.wikipedia.org, shinetsu.co.jp