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Tosoh Corporation
Native name
Company typePublic (K.K)
TYO: 4042
Nikkei 225 Component
FoundedFebruary 11, 1935 (1935-02-11)
Headquarters3-8-2, Shiba, Minato-Ku, Tokyo 105-8623, Japan
Key people
Kenichi Udagawa, (CEO and President)
RevenueDecrease $ 7.107 billion USD (FY 2012) (¥ 668.494 billion JPY) (FY 2012)
Increase $ 179.341 million USD (FY 2012) (¥ 16.867 billion JPY) (FY 2012)
Number of employees
11,268 (consolidated) (as of March 31, 2012)
WebsiteOfficial website
Footnotes / references

Tosoh Corporation (東ソー株式会社, Tōsō Kabushiki-gaisha) is a global chemical and specialty materials company. The company was founded in 1935 in Yamaguchi Prefecture, as Toyo Soda Manufacturing Co., Ltd.,[3] and in 1987 changed its name to Tosoh Corporation. Today, its corporate headquarters are in Tokyo, Japan.

It began as a manufacturer of chlor-alkali and petrochemical commodities and feedstocks. Today it produces other kinds of products including electrolytic manganese dioxide (EMD), specialty polymers, fine chemicals, scientific instruments, and thin-film materials.

The Tosoh Group globally comprises more than 130 companies and includes manufacturing and marketing facilities in East Asia, Europe and the United States.

The company is listed on the first section of the Tokyo Stock Exchange and is a constituent of the Nikkei 225 stock index.[4][5]

Tosoh's Nanyo complex has an annual vinyl chloride monomer production capacity of 1.2 million tonnes, the primary chemical intermediate of vinyl plastic.[6]

Tosoh is a member of the Mizuho keiretsu.

Tosoh acquired Nippon Polyurethane Industry [ja] in 2006[7] and absorbed into Tosoh in 2014.[8]

Business groups and products

Tosoh Corporation is divided into 13 business divisions that are organized into five groups: Petrochemical, Chlor-Alkali, Speciality, and Engineering. The fifth group is composed of support services, including logistics, construction, engineering support, and other support activities. Listed below are the five groups and their primary products:[9]

The Specialty Group focuses on products for high-tech industries such as semiconductors, consumer electronics, pharmaceuticals, and healthcare.


  1. ^ "Tosoh at a Glance". Archived from the original on May 19, 2016. Retrieved March 25, 2014.
  2. ^ "Annual Report 2013" (PDF). Retrieved March 25, 2014.
  3. ^ "History of Tosoh". Retrieved March 25, 2014.
  4. ^ "Components:Nikkei Stock Average". Nikkei Inc. Retrieved March 25, 2014.
  5. ^ Kitanaka, Anna (6 July 2015). "Japan Stocks Fall, Yen Rises After Greece Votes No to Austerity". Bloomberg. Retrieved 10 September 2015.
  6. ^ a b Tsukimori, Osamu (13 November 2011). "UPDATE 1-Tosoh's monomer plant caught fire after explosion". Reuters. Retrieved 10 September 2015.
  7. ^ "Nippon Polyurethane Industry Becomes Tosoh Subsidiary".
  8. ^ "Archived copy". Archived from the original on 2020-01-16. Retrieved 2020-01-16.((cite web)): CS1 maint: archived copy as title (link)
  9. ^ "Business Groups". Retrieved March 26, 2014.