Facility · Neutrinos
Hyper-Kamiokande
Water Cherenkov detector (~260 kt) with a neutrino beam from J-PARC
- Status
- Under construction
- Location
- Kamioka, Japan
- Operator
- Hyper-K Collaboration, ICRR and KEK
- Next
- 2027 photomultiplier installation; 2028 — first data (plan)
Summary
The successor to Super-Kamiokande, about eight times larger in volume. Its goals are CP violation in neutrinos (with the J-PARC beam), proton decay and neutrinos from supernovae. A direct competitor of DUNE.
Now as of 4 Nov 2026
Excavation of the cavern was completed in summer 2025; the tank is being built in 2026, photomultipliers will be installed in 2027, and first data are expected in 2028 (PoS, Hyper-K status, CERN Indico, January 2026).
Key dates
- 2025 (summer)Cavern excavation completeddone
- 2026Tank constructionongoing
- 2027Photomultiplier installationplanned
- 2028First dataplanned