September 1969
Special Committee on the Institute of Gerontology (tentative name) was organized by order of the Governor.

July 1970
Construction of the building began.

October 1970
The Preparatory Committee for Setting-up of the Institute of Gerontology (tentative name) was organized.

March 1972
Construction of the building was completed.

April 1972
The Tokyo Metropolitan Institute of Gerontology (TMIG) was formally opened.

October 1981
TMIG was reorganized and became a private foundation to promote active and creative research.

September 1984
Agreement was reached on research collaboration between TMIG and the National Institute on Aging of the United States.

June 1986
TMIG was designated by The World Health Organization as a WHO Collaborating Center for the Health of the Elderly.

March 1988
Research collaboration was established between TMIG and the Beijing Geriatric Institute, Capital Institute of Medicine, the People's Republic of China.

September 1988
Scientific cooperation was established between TMIG and the Institute of Gerontology, Academy of Medical Science, Ukraine.

August 1990
TMIG reorganized its laboratories into six divisions.

September 1990
The Positron Medical Center was established.

April 1998
TMIG recognized its laboratories into eight division and Positron Medical Center.

April 2002
TMIG and a foundation for regional welfare for senior citizens and the disabled were rnerged in the Tokyo Metropolitan Foundation for Research on Aging and Promotion of Human Welfare.
The research group system was introduced.

April 2005
The core research system was introduced.

April 2009
Tokyo Metropolitan Institute of Gerontology (TMIG) and Tokyo Metropolitan Geriatric Hospital (TMGH) were merged and established new organization as Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology( TMGHIG).