Hamao Umezawa

 was a Japanese scientist who discovered several antimicrobial agents and enzyme inhibitors.
After graduating from the Musashi Junior and Senior High School, Umezawa completed his medical degree at the University of Tokyo Graduate School of Medicine in 1937. After serving in the Japanese army during World War II Umezawa did work on tuberculosis which led to his discovery, in 1956, of antibiotic kanamycin. By this stage Umezawa was heading the Institute of Microbial Chemistry in Tokyo where his main focus was antimicrobial agents manufactured through fermentation processes. Also in the mid-1950s Umezawa discovered kasugamycin, a compound useful in combating rice molds. In the early 1960s he discovered the cancer drug bleomycin.
The Hamao Umezawa Memorial Museum in Setagaya, Tokyo was named in his honour.