Corporate name changed to Nippon Kasei Chemical Company Limited
Corporate name changed to Mitsubishi Kasei Corporation
Corporate name changed to Mitsubishi Chemical Corporation through the merger with Mitsubishi Petrochemical Co., Ltd.
Yoshitomi Fine Chemicals, Ltd.,
Yoshitomi Pharmaceutical Industries founded
Yoshitomi Fine Chemicals, Ltd. was created by spinning off operations related to the manufacture of pharmaceutical bulk and intermediates, as well as the production and marketing of fine chemicals.
API Corporation was established through integration of active pharmaceutical ingredients business and a part of fine chemicals business which had been run by Mitsubishi Chemical's Specialty Chemicals Company into
Yoshitomi Fine Chemicals.
Operations of the Iwaki Plant were transferred to the Company from Mitsubishi Pharma Corporation.(currently named Mitsubishi Tanabe Pharma Corporation)