Masatoshi Koshiba
- Year and place of birth : 1926 at Toyohashi
- County : Japan
Nobel Prize in 2002 in the field of physics
The Nobel Prize in Physics 2002 was divided, one half jointly to Raymond Davis Jr. and Masatoshi Koshiba for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos and the other half to Riccardo Giacconi for pioneering contributions to astrophysics, which have led to the discovery of cosmic X-ray sources.