Masazumi Harada (原田 正純, 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 (水俣病, Minamata-byō) (1972) and Minamata Ga Utsusu Sekai (水俣が映す世界, Minamata Ga Utsusu Sekai) (1989).
He died June 11, 2012, of acute myelocytic leukemia at his home in Kumamoto.
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