Mitsubishi Kasei Corporation and Mitsubishi Petrochemical Co., Ltd. merged and started the operation as Mitsubishi Chemical Corporation. Mitsubishi Kasei Corporation Mitsubishi Petrochemical Co., Ltd. Mitsubishi Chemical Corporation Aug 1934 The predecessor of Mitsubishi Kasei Industries Corporation was founded. Oct 1935 Kurosaki Plant started its Jun 1950 Mitsubishi Kasei Industries Corporation (the predecessor of Mitsubishi Kasei Corporation) was listed on the Tokyo Stock Exchange.Aug 1950 Osaka Branch Office was established.Jul 1953 Mitsubishi Kasei Industries Corporation (the predecessor of Mitsubishi Kasei Corporation) merged with Toho Kagaku Kogyo (Yokkaichi Plant), and the Plant started its operation as Yokkaichi Plant (present Yokkaichi Plant) of Mitsubishi Kasei Industries Corporation.Apr 1956 Mitsubishi Group and Shell Group jointly established Mitsubishi Petrochemical Co., Ltd. Mitsubishi Kasei Industries Corporation (the predecessor of Mitsubishi Kasei Corporation) established Tokyo Branch Office (- Sep 2000), Nagoya Branch Office (present Chubu Branch Office), and Kyushu Branch Office.May 1959 Mitsubishi Petrochemical Co., Ltd. started its operation of Yokkaichi Division (present Yokkaichi Plant). Feb 1961 Duesseldorf Office (present Mitsubishi Chemical Europe GmbH) was established. Apr 1961 New York Office (present MitsubishiChemical America, Inc.) was established. May 1963 Naoetsu Plant started its operation. Jul 1964 Mizushima Plant started its operation. Apr 1968 Tsukuba Research Center (present MCC-Group Science & Technology Office, Tsukuba Center) was established. Nov 1969 Sakaide Plant started its operation.Jan 1971 Kashima Division (present Kashima Plant, Tobu Zone) started its operation. Apr 1971 Hong Kong Office (present Mitsubishi Chemical Hong Kong Ltd.) was esta