Masatoshi Kajita graduated from the Department of Applied Physics at the University of Tokyo in 1981 and obtained his PhD from the Department of Physics at the University of Tokyo in 1986. After working at the Institute for Molecular Science, he joined the National Institute of Information and Communications Technology (NICT), formally Communications Research Laboratory (CRL), in 1989. In 2009 he was guest professor at the Université de Provence in Marseille, France.