Yoji Totsuka

Yoji Totsuka
Yoji Totsuka
Born	6 March 1942
Died	10 July 2008 (aged 66)
Alma mater	University of Tokyo ;
Employer	DESY; KEK; Kamioka Observatory; Super-Kamiokande; University of Tokyo ;
Awards	Order of Culture (2004); Franklin Institute Awards (2007); Asahi Prize (1998); Panofsky Prize (2002); Nishina Memorial Prize (1987); Clarivate Citation Laureates (physics, 2007) ;

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.