Future possibilities with the J-PARC neutrino beam

The J-PARC neutrino beam line is under construction. The next generation neutrino oscillation experiments, including the T2K experiment, will observe evidence for a finite θ13, if sin2 2θ13 > 0.01. In this case, it is likely that future long baseline experiments with the conventional but strong neutrino beam can measure important neutrino parameters such as the CP violation phase and the mass hierarchy. In this paper, possible future neutrino oscillation experiments to be carried out using the J-PARC neutrino beam are discussed.