HyperKamiokande (HK) is a long-baseline neutrino experiment located in Japan. HK aims to advance our knowledge of neutrinos with precise measurements of accelerator and atmospheric neutrinos. In particular, HK will carry out a precise determination of the charge-parity (CP) violating phase in the neutrino sector. A non-zero CP phase gives rise to a matter-antimatter asymmetry in neutrino interactions. In addition, HK will carry out a sensitive search for proton decay and measure a variety of terrestrial and astronomical neutrino sources including geoneutrinos, solar neutrinos, supernova neutrinos.