The Hyper-Kamiokande (Hyper-K, or HK) project in Japan represents a new generation of very large water Cherenkov detectors, a proven technique for neutrino detection. It will have a far detector with a payload 8.4 times larger than its predecessor Super-Kamiokande, and will be equipped with new generation high sensitivity photomultipliers.
As for T2K, neutrinos will be produced by a proton gas pedal at J-Parc in Tokai, 300km from Kamioka. The project has been formally launched in Japan, and work can begin in 2020. The first data collection is expected before 2030. About 450 scientists from 19 countries have expressed interest in the project.