In 1998, the Super-K detector in Japan revealed that ubiquitous, almost massless particles called neutrinos have the ability to morph from one type to another. That landmark finding has become one of the most heavily cited scientific results in particle physics (2015 Nobel Prize). The ``K'' in Super-K and Hyper-K stands for a play on the word Kamioka, the name of a mountainous area about 200 miles west of Tokyo that houses multiple particle physics experiments. \par Nowadays, scientists have proposed to build a successor to the still-operating Super-K:Hyper-K, a detector consisting of a megaton scale water tank and ultra-high sensitivity photosensors. \par Part microscope and part telescope, the proposed Hyper-K experiment could fill in some of the blanks in our understanding of our universe. It could help explain why the universe favors matter over antimatter. It could provide new details about the fluctuating ``flavors'' or types of neutrinos. It could help elucidate whether there is any difference between neutrinos and their anti-particles. \par It could also provide a better understanding of dark matter and exploding stars and could reveal whether protons -- a main ingredient in all atoms -- have an expiration date. \par The proposed experiment would be complementary to DUNE a planned long-baseline neutrino experiment in the United States that will use different technology. \\ \\ (Will take place at: Auditorium Pierre Lehmann (LAL); Bât.200.)