On February 23, 1987, neutrinos from a supernova explosion in the Large Magellanic Cloud were observed for the first time in the world. Observations of supernova neutrinos, which are emitted from supernova explosions caused by gravitational collapse at the center of massive stars during the final stage of their evolution, are important for various topics in astrophysics, including the history of star formation and the mechanism of supernova explosions. Therefore, supernova neutrinos have been actively studied both observationally and theoretically. In particular, Super-Kamiokande, which entered a new phase as SK-Gd in 2020, is expected to bring drastic progress in supernova neutrino research. Furthermore, the Hyper-Kamiokande is scheduled to start operation in 2027, and its construction is underway. It will have about 10 times larger volume than Super-Kamiokande, and supernova neutrino observations will also enter the phase of precision measurements. In this seminar, I will talk about recent progress and prospects of supernova neutrino research.
