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1980's
Oct. 1981	Constructed an organic intermediate CTF plant in Yokkaichi .
Dec. 1983	Constructed a magnetic iron oxide plant in Yokkaichi .
Aug. 1986	Established ISK Singapore Pte. Ltd., ISK's subsidiary in Singapore , together with a chloride processed titanium dioxide plant.
Aug. 1989	Transferred agrochemicals marketing business in Japan to Ishihara Sangyo Agrochemicals Co., Ltd., one of ISK's subsidiaries (now ISK Biosciences K.K.)

1990's
Apr. 1990	Purchased RMI Pty. Ltd. in Australia (now ISK Australia Pty Limited).
Nov. 1990	Purchased SDS Enterprise in the U.S. (now ISK Biosciences Corporation)
Apr. 1991	Purchased magnetic materials operation from Harcros Pigments Inc. in the U.S. (now ISK Magnetics, Inc.)
Mar. 1993	New Ishihara Building completed in Osaka . Transferred the head office to the new building in April 1993.
Dec. 1994	Established SUD ISK-SNPE S.A., a joint venture in France producing fine chemical products (The joint venture terminated in July 2005).
July 1996	Transferred agrochemicals marketing business in Europe to ISK Biosciences Europe S.A., one of ISK's subsidiaries in Europe .
Oct. 1998	Sold an agrochemicals operation in the U.S. to Zeneca Limited (now Syngenta Limited ).
Feb. 1999	Commenced custom manufacturing of active pharmaceutical ingredient in Yokkaichi.

2000's
Mar. 2001	Withdrew from business of magnetic materials for videotapes
Dec. 2001	In Yokkaichi, constructed a facility for manufacturing HVJ-E vector for gene function analysis.
Mar. 2005	Subsidized Fuji Titanium Industry Co., Ltd. as a wholly owned subsidiary.
June. 2005	Decided to recall Ferosilt voluntarily (stopped selling in April 2005) and then, received local governments' orders to take measures under the Waste Management and Public Cleansing Act.
Nov. 2005	Established a joint venture for marketing agrochemicals (Zhejiang Ishihara Jinniu Chemical Industries) in China .
Sept. 2006	Formed a business alliance with United Phosphorus Limited (UPL), the largest manufacturer of agrochemicals in India.
Mar. 2008	Reviewed the company's overall compliance status. (Findings of the review and measures to prevent recurrence were announced in May 2008.)
June. 2010	Launched Environmental Materials on a full scale.
Sept. 2010	Acquired 100% ownership of Yokkaichi Energy Service Co., Ltd., a private electricity generating company.