The Kamioka Observatory is a scientific facility located in the mountains of Gifu Prefecture, Japan. It is primarily known for its research in particle physics and astrophysics, particularly in the study of neutrinos. The observatory houses several large detectors, including the Super-Kamiokande, which is designed to observe neutrinos produced by cosmic events and nuclear reactions. Established in 1982, the observatory has contributed significantly to our understanding of fundamental particles and their interactions. It has been involved in various groundbreaking experiments, including the discovery of neutrino oscillation, which demonstrated that neutrinos have mass. The Kamioka Observatory continues to be a key site for international scientific collaboration.