1890 March The Marunouchi site (over 353,000m²)--a former military training ground known as Kanda Misaki-cho--purchased by Mitsubishi Company from the Japanese government
September Marunouchi Architectural Office established
1893 December Mitsubishi Goshi Kaisha (limited partnership) established
1894 June Mitsubishi Ichigokan, the first office building in Marunouchi, completed
1906 July Real Estate Division established within Mitsubishi Goshi Kaisha
1923 February Marunouchi Building completed
1937 May Mitsubishi Estate Company, Limited established with paid-in capital totaling ¥15 million, with the ownership of the Marunouchi Building and its site, as well as business rights for buildings and land within the Marunouchi area, transferred from Mitsubishi Goshi Kaisha
November Construction-related businesses of Mitsubishi Goshi Kaisha transferred to Mitsubishi Estate
1945 April Ownership of Yaesu Building (completed in March 1928 and renamed Marunouchi Yaesu Building in 1962) and its site transferred from Mitsubishisha Co., Ltd. to Mitsubishi Estate
1950 January Business rights for the Marunouchi site and other land and buildings, excluding those for Marunouchi Building and Yaesu Building, were returned to Mitsubishihonsha Co., Ltd. . Mitsubishihonsha Co., Ltd. dissolved and its operations transferred to two newly established secondary corporations, Yowa Fudosan Ltd. and Kaito Fudosan Ltd.
1952 May Mr. Takejiro Watanabe appointed president
November Shin-Marunouchi Building completed
1953 April Yowa Fudosan and Kaito Fudosan merged with Mitsubishi Estate
May Mitsubishi Estate's shares listed on the Tokyo Stock Exchange and the Osaka Securities Exchange
1959 July Marunouchi Remodeling Plan formulated
1960 February Marunouchi Parking Area completed
1962 December Hokkaido Building completed
1969 May Mr. Otokazu Nakata and Mr. Takejiro Watanabe appointed president and chairman, respectively
Akasaka Park House offered for sale in lots, marking the launch of the Condominium Business
1972 April Mitsubishi Estate New York Inc. established
June The first phase of the Izumi Park Town Project launched
December Mitsubishi Real Estate Services Co., Ltd. established
1973 November Branches established in Sapporo, Sendai, Nagoya and Osaka
1975 May Semiannual settlement of accounts changed to annual
1978 October Shin Aoyama Building completed
1980 June Mr. Tatsuji Ito and Mr. Otokazu Nakata appointed president and chairman, respectively
1981 October Hibiya Kokusai Building completed
1983 April  Nagoya Dai-Ichi Hotel opened (renamed Royal Park Inn Nagoya in April 2001)
November MEC USA, Inc. established
1984 July Mitsubishi Estate Home Co., Ltd. established
1986 March MEC UK Limited established
July The first consolidated financial statements announced
October Yokohama Office established (reorganized as Yokohama Branch in April 2000)
1987 June  Mr. Jotaro Takagi appointed president
1988 January Yokohama Minato Mirai 21 Block-25 Development Plan announced
1989 April Tenjin MM Building (IMS) opened in Fukuoka City
June Royal Park Hotel in Hakozaki, Tokyo opened
July  Hiroshima Park Building completed
Hiroshima Branch (renamed Chugoku Branch in April 2000) and Kyushu Branch established
1990 February Participation in the City of London's Paternoster Square Project announced
April Capital investment in the Rockefeller Group, Inc. initiated
September  Construction of Ryokuendai New Town commenced
1993 July Akasaka Park Building completed
Yokohama Landmark Tower completed
September Yokohama Royal Park Hotel opened
1994 June Mr. Takeshi Fukuzawa and Mr. Jotaro Takagi appointed as president and chairman, respectively
1995 November Reconstruction of Marunouchi Building announced
1996 January Osaka Amenity Park (OAP) completed
November Head Office relocated to Tokyo Building
1999 April  Reconstruction of Marunouchi Building commenced
2000 April Aqua City Odaiba commercial complex opened under the management of Mitsubishi Estate subsidiary Aqua City Co., Ltd. (renamed Mitsubishi Jisho Retail Property Management Co., Ltd. in July 2007)
November Royal Park Hotels and Resorts Co., Ltd. established
2001 April Takeshi Fukuzawa Board of Directors of the Director and Shigeru Takagi appointed President & Chief Executive Officer
June Started Mitsubishi Jisho Sekkei Inc., Ltd., which was spun off from the Architectural Design & Engineering Business Headquarters.
September Mitsubishi Jisho Investment Advisors, Inc. established
2002 March Properties and equipment revaluated in accordance with the Law Concerning Revaluation of Land and other relevant laws and regulations
September  Marunouchi Building opened (completed in August)
2003 February  Mitsubishi Trust and Banking Building completed (renamed Mitsubishi UFJ Trust and Banking Building in October 2005)
March Head Office relocated to Otemachi Building
April  Introduction of an executive officer system
May Paternoster Square completed in the City of London
July  Royal Park Shiodome Tower opened
2004 September  Marunouchi OAZO opened (completed in August)
December Capital investment in Towa Real Estate Development Co., Ltd. initiated
2005 March  Construction of Shin-Marunouchi Building commenced
June  Mr. Keiji Kimura appointed president
November Tokyo Building opened (completed in October)
2007 April Implementation of organizational reforms
(Abolishment of the business division system, introduction of a responsible officer system, etc.)
April Shin-Marunouchi Building opened
September The Peninsula Tokyo opened (completed in May)
2008 January Towa Real Estate Development turned into a Mitsubishi Estate consolidated subsidiary
March  Sunshine City Corporation turned into a Mitsubishi Estate consolidated subsidiary
April Implementation of organizational reforms (introduction of business groups, etc.)
October  Mitsubishi Estate Asia Pte. Ltd. commenced operations
2009 March Chelsea Japan Co., Ltd. turned into a Mitsubishi Estate consolidated subsidiary
April  Towa Real Estate Development turned into a Mitsubishi Estate wholly owned subsidiary
April  Marunouchi Park Building & Mitsubishi Ichigokan completed
September "Marunouchi BRICK SQUARE BRICK SQUARE" opened
2010 March  Construction under the Osaka Station North District Phase 1 Development Project commenced
April Mitsubishi Ichigokan Museum opened
2011 January Mitsubishi Jisho Residence Co., Ltd. established through company spin-offs and the subsequent integration of residential development and sales businesses of Mitsubishi Estate, Mitsubishi Real Estate Services Co., Ltd. and Towa Real Estate Development Co., Ltd.
April Mr. Keiji Kimura and Mr. Hirotaka Sugiyama appointed chairman and president, respectively
April  Shanghai Representative Office established
year 2012 January  Marunouchi Eiraku Building completed
October  Otemachi Financial City completed
2013 April  Grand Front Osaka opened
April  MARK IS shizuoka opened
June MARK IS minatomirai opened
2014 April Mitsubishi Estate Building Management and Mitsubishi Estate Property Management integrated
December Singapore CapitaGreen completed
2015 January TA Realty LLC acquired
October  Dai Nagoya Building completed
November Otemon Tower ・JX Building completed
June  Transitioned to a"Company with Nominating Committee,etc."organizational structure
2017 January  Otemachi Park Building completed
April Mr. Hirotaka Sugiyama and Mr. Junichi Yoshida appointed chairman and president, respectively
April Head Office relocated to Otemachi Park Building
2018 January Moved head office to Otemachi Park Bldg.
October Marunouchi Nijubashi Bldg completed
2019 January Mitsubishi PT. Mitsubishi Estate Indonesia and Mitsubishi Estate Vietnam Company Limited established 
2020 September Mizuho Marunouchi Tower / Ginkokaikan / Marunouchi Terrace completed
2021 April Merger of Mitsubishi Mitsubishi Jisho Property Management Co., Ltd., Ltd. and Mitsubishi Jisho Retail Management Co., Ltd.
June TOKYO TORCH "Tokiwabashi Tower" completed