Famous People of Japan
Japanese people database × places of origin

Yoji Totsuka (戸塚 洋二, Totsuka Yōji; March 6, 1942 – July 10, 2008) was a Japanese physicist and Special University Professor, emeritus, University of Tokyo. A leader in the study of solar and atmospheric neutrinos, he was a scientist and director at Kamioka Observatory, Super-Kamiokande and the High Energy Physics Laboratory (KEK) in Japan. Totsuka helped to discover neutrino oscillation and neutrino mass, laying a foundation for the international study of neutrinos.

Source: “Yoji Totsuka”, English Wikipedia (CC BY-SA 4.0), excerpt