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April 1898 Hisaya Iwasaki purchased a paper mill operated by Walsh Brothers in Sannomiya, Kobe, and formed Kobe Paper Mill Company to start production and sale of paper. (Founding of the company) 
June 1901 Mill moved from Sannomiya, Kobe to Takasago-shi, Hyogo-ken. (present Takasago Mill) 
December 1902 Began production of Kin-bishi (wood free paper). 
June 1904 Changed company name to Mitsubishi Paper Mills Company. 
June 1911 Established Taiwan Mitsubishi Paper Mills Company in Taiwan to produce bamboo pulp by sulfite process. 
April 1916 Closed Taiwan Mitsubishi Paper Mills Company. 
February 1917 Constructed Nakagawa Mill in Niijuku, Katsushika-ku, Tokyo. 
November 1917 Incorporated and changed name to Mitsubishi Paper Mills, Ltd. 
March 1918 Began production of real art paper. 
December 1925 Moved head office from Takasago, Hyogo to Yurakucho, Chiyoda-ku, Tokyo. 
June 1935 Began production of Baryta paper (photographic base paper). 
February 1944 Merged with the Kyoto Photographic Industry Company, Ltd. And began trial production of photographic paper in the Kyoto Trial Mill. (present Kyoto Mill) 
August 1944 Merged with Naniwa Paper Mill Ltd. Renamed Naniwa Mill with the beginning of paperboard production. 
August 1946 Association of Mitsubishi Paper Mills labor unions organized. 
April 1950 Individual mills' labor unions federated into independent union called Mitsubishi Paper Mills Labor Union. 
July 1950 Released Gekko V (blue-tint black) photographic paper utilizing fluorescent materials. Welcomed by much acclaim. 
November 1952 Mitsubishi Paper Mills Health Insurance Cooperative organized. 
June 1962 Technical license agreement concluded with National Cash Register Company, U.S.A. for the domestic production of NCR paper in Japan. 
April 1965 Released Mitsubishi Color Photographic Paper. 
April 1966 Constructed Hachinohe Mill in Hachinohe-shi, Aomori. 
April 1966 Merged with Shirakawa Pulp Industry Ltd. and acquired Shirakawa Mill and Kitakami Mill. (present Kitakami Hitec Paper Corp.) 
December 1966 Closed Naniwa Mill. 
August 1971 Established Central Research Laboratory. 
July 1974 Released the Mitsubishi Silver Master direct platemaking system. 
July 1979 Established Printing Center. 
July 1981 Moved head office to 3-4-2 Marunouchi, Chiyoda-ku, Tokyo. (Present location) 
April 1986 Established Process Developement Laboratory, Closed Printing Center.
January 1989 Established Tsukuba Research Laboratory. (present Tsukuba R&D Laboratory) 
August 1989 Established Mitsubishi Paper GmbH in Dusseldorf, (Germany). 
August 1990 Established joint venture with Mitsubishi Corporation in Chili called Forestal Tierra Chilena Ltda. to start afforestation overseas. 
January 1995 Established joint venture called Mitsubishi Imaging (MPM), Inc in New York, U.S.A. 
January 1999 Acquired stock of two German paper companies. (Present Mitsubishi Hitec Paper Bielefeld GmbH and Mitsubishi Hitec Paper Flensburg GmbH) 
June 2002 Established Mitsubishi Paper Holding(Europe)GmbH (Germany)on top of Mitsubishi Paper GmbH and two subsidiary companies in Germany(Mitsubishi Hitec Paper Bielefeld GmbH and Mitsubishi Hitec Paper Flensburg GmbH.)
March 2003 Closed Nakagawa Mill. 
April 2005 Spun off Kitakami Mill to create Kitakami Hitec Paper Corp. 
August 2007 Formed business alliance with FUJIFILM in the photography business. 
November 2007 Formed operating alliance with Oji Paper in relation to the communication paper business. 
November 2007 Established Zuhai MPM Filter, Ltd. in China to process filter products.
October 2010

Two subsidiary companies in Germany(Mitsubishi Hitec Paper Bielefeld GmbH and Mitsubishi Hitec Paper Flensburg GmbH) merged,established Mitsubishi Hitec Paper Europe GmbH.

October 2011

Acquired all stocks of KJ Specialty Paper Co.,Ltd. (Subsidiary of Kohjin Co.,Ltd.)

July 2012 Moved head office to 2-10-14 Ryogoku, Sumida-ku, Tokyo.
April 2014

Established MPM Operation Co., Ltd.

March 2016

Established joint venture with Oji Green Resources Co., Ltd. called MPM OJI  
Eco Energy Co., Ltd.

April 2017

Established joint venture with Oji Nepia Co., Ltd. called MPM OJI Home Products Co., Ltd.

March 2019

Mitsubishi Paper Mills became an equity-method affiliate of Oji Holdings Corporation through the third-party allocation of shares etc.

June 2021

Established Takasago R&D Laboratory.

October 2021

Closed Tsukuba R&D Laboratory. 

March 2022

Closed Process Developement Laboratory. 

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