Masatoshi Koshiba

Masatoshi Koshiba
Photograph of Koshiba published in 2002
Born	(1926-09-19)September 19, 1926 Toyohashi, Aichi, Japan
Died	November 12, 2020(2020-11-12) (aged 94) Tokyo, Japan
Nationality	Japanese
Alma mater	University of Tokyo University of Rochester
Known for	Astrophysics, neutrinos
Awards	Humboldt Prize (1997) Wolf Prize in Physics (2000) Nobel Prize in Physics (2002)
Scientific career
Fields	Physics
Institutions	University of Chicago George Washington University University of Tokyo Tokai University
Thesis	High energy electron-proton cascade in cosmic radiation (1955)
Doctoral advisor	Morton F. Kaplon
Other academic advisors	Shin'ichirō Tomonaga Takahiko Yamanouchi
Doctoral students	Yoji Totsuka Atsuto Suzuki
Other notable students	Takaaki Kajita

Masatoshi Koshiba (小柴 昌俊, Koshiba Masatoshi, 19 September 1926 – 12 November 2020) was a Japanese physicist and one of the founders of neutrino astronomy. His work with the neutrino detectors Kamiokande and Super-Kamiokande was instrumental in detecting solar neutrinos, providing experimental evidence for the solar neutrino problem.

Koshiba won the Nobel Prize in Physics in 2002, jointly with Raymond Davis Jr., "for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos".

He was a senior counselor at the International Center for Elementary Particle Physics (ICEPP) and professor at the University of Tokyo.