Number of CERN users

279 (January 2016)

CERN contact

E. Tsesmelis

Participation in CERN Experiments


Participation in CERN Accelerator Projects


WLCG Participation

Tier-2 centre

Collaborating Institutes

° Aichi University of Education, Kariya
° Hiroshima University
° Hiroshima Institute of Technology
° Kanagawa University
° Kobe University
° Konan University
° Kyoto University
° Kyoto University of Education
° Kyushu University
° Nagasaki Institute of Applied Science
° Nagasaki University
° Nagoya University
° Nara's Women University
° Okayama University
° Osaka University
° Ritsumeikan University
° Shibaura Institute of Technology, Saitama
° Shinshu University
° Toho University, Funabashi
° Japan Atomic Energy Agency
° Japan Atomic Energy Research Institute, Tokai-Mura
° Tokyo University
° Tokyo Metropolitan University
° Tokyo Institute of Technology
° Tokyo University of Science
° High Energy Accelerator Research Organization (KEK), Tsukuba
° Tsukuba University
° Utsunomiya University
° Institute of Physical and Chemical Research (RIKEN), Wako
° Waseda University
° Yamagata University

(Only Institutes having signed a Memorandum of Understanding with CERN are listed here. For all participating institutes, refer to the CERN greybook)

Japan has a strong domestic programme based on the High Energy Accelerator Research Organization (KEK) and the Kamioka Laboratory, and is currently operating KEK-B, the BELLE experiment, the J-PARC facility for nuclear and particle physics and the T2K long-baseline neutrino experiment. Japan made an important contribution to the OPAL experiment at LEP, as well as to CHORUS and the AD facility. Japan made a very important financial and technical contribution to the LHC accelerator, as well as to ATLAS via KEK, Tokyo and other universities. Japanese institutions have also joined ALICE and LHCf. Japan is a special Observer State, with the right to attend restricted Council sessions for discussions of LHC matters.

Japan contributed to the material costs of Phase 1 of the WLCG at CERN and is now contributing to deployment of the WLCG with a Tier-2 centre. Japan is also a key contributor to the OPERA experiment, principally via Nagoya University, and to the ASACUSA and ALPHA experiments at the AD, and also participates in fixed-target experiments. Japan also collaborates to the COMPASS, DIRAC, MERIT, NA61 and nTOF experiments. Japan is one of the principal proponents of a future linear collider, and is also making a valuable contribution to CLIC R&D, where KEK has important relevant expertise.

CERN and KEK signed a framework agreement in 2009 and a CERN-KEK Committee was set up to advise the two laboratories on their future collaboration, including contributions to R&D on LHC upgrades.