The trio--two based in the United States and one in Japan--was recognised for their "groundbreaking discoveries concerning peripheral immune tolerance." that prevents the immune system from harming the body.
Ohsumi, born in 1945 in Fukuoka, Japan, has been a professor at the Tokyo Institute of Technology since 2009.
The IP & Science business of Thomson Reuters has announced its 2013 "Nobel-class" Citation Laureates on Wednesday, which names 28 researchers representing 22 distinct academic and research organisations, and six different countries.