|1931||Osaka Imperial University was founded. The first president was Hantaro Nagaoka (famous for Saturnian Model of the Atom)|
|1933||School of Science was founded. Hideki Yukawa got a post of lecturer.
Construction of a Cockcroft-Walton accelerator started (Masashi Kikuchi).
|1935||Dr. Hideki Yukawa published the first paper on the meson theory.
Construction of a cyclotron started (Masashi Kikuchi).
|1937||Construction of a cyclotron completed.|
|1940||Construction of a van de Graaff accelerator started (Tetsuo Wakatsuki and Koji Fushimi).|
|1955||Laboratory of Nuclear Studies has been founded under school of science.|
|1962||Science Council of Japan exhorted the government to found a laboratory of nuclear physics.|
|1971||Research Center for Nuclear Physics was founded as a collaboration research center of the nuclear physics community. The first director was Shotaro Yamabe.|
|1973||Construction of the AVF cyclotron completed.|
|1976||Collaboration research experiments started.|
|1985||Cyclotron cascade project was planned.|
|1987||Construction of the RING cyclotron started.|
|1991||Construction of the RING cyclotron completed.|
|1997||Oto Cosmo Observatory was constructed.|
|2000||Laser Electron Photon beam line at SPring-8 (LEPS) was constructed.|
|2005||Upgrade of the injector cyclotron completed.|