Hyper-Kamiokande, a next-generation water Cherenkov detector, will be a powerful tool for low
energy neutrino astrophysics. Hyper-Kamiokande will begin construction in 2020 with data taking expected in 2027, and will have a fiducial volume of 187 ktons. The neutrinos detected from a galactic supernova burst would allow us to probe the detailed inner dynamics of the explosion, as well as give fundamental information about the neutrino itself. Neutrinos that arise from all the supernova explosions in the universe, known as the diffuse supernova neutrino background, will also be measured in Hyper-Kamiokande and will allow us to measure the average properties of supernova explosions.