The J-PARC stands for Japan Proton Accelerator Research Complex and is an accelerator-based research facility with intense proton beams at Tokai-mura, Ibaraki, Japan.
J-PARC has three proton accelerators and three research facilities with using MW-class high power proton beams, which generate neutrons, muons, mesons and neutrinos for experiments, to underlie the development of advanced science.