  Hyper-Kamiokande is the next generation underground water Cherenkov detector
that builds on the highly successful Super-Kamiokande experiment. The detector
which has an 8.4~times larger effective volume than its predecessor will be
located along the T2K neutrino beamline and utilize an upgraded J-PARC beam
with 2.6~times beam power. Hyper-K's low energy threshold combined with the
very large fiducial volume make the detector unique, that is expected to
acquire an unprecedented exposure of 3.8~Mton$\cdot$year over a period of
20~years of operation. Hyper-Kamiokande combines an extremely diverse science
program including nucleon decays, long-baseline neutrino oscillations,
atmospheric neutrinos, and neutrinos from astrophysical origins. The scientific
scope of this program is highly complementary to liquid-argon detectors for
example in sensitivity to nucleon decay channels or supernova detection modes.
Hyper-Kamiokande construction has started in early 2020 and the experiment is
expected to start operations in 2027. The Hyper-Kamiokande collaboration is
presently being formed amongst groups from 19 countries including the United
States, whose community has a long history of making significant contributions
to the neutrino physics program in Japan. US physicists have played leading
roles in the Kamiokande, Super-Kamiokande, EGADS, K2K, and T2K programs.
