Masazumi Harada (?? ??, Harada Masazumi, September 14, 1934-June 11, 2012) was a Japanese doctor and medical researcher.
His most famous work covered the effects of Minamata disease, a type of severe mercury poisoning that occurred in the city of Minamata, Kumamoto Prefecture during the 1950s and 1960s.
His publications included Minamata disease (???, Minamata-byo) (1972) and Minamata Ga Utsusu Sekai (???????, Minamata Ga Utsusu Sekai) (1989).
He died June 11, 2012 of acute myelocytic leukemia at his home in Kumamoto.