Masao Ito (伊藤正男 Itō Masao?, born 1928 in Nagoya, Japan) is a Japanese neuroscientist, and director of the Riken Brain Science Institute. He won the 2006 Gruber Neuroscience Prize and the 1996 Japan Prize. He was elected a Foreign Member of the Royal Society in 1992.
Dr. Ito graduated from the University of Tokyo with an M.D. in 1953 and a Ph.D. in 1959. He was a research fellow at Australian National University from 1959 to 1962. He taught at the University of Tokyo from 1963.
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