Sasebo City has the best historic cave site in Japan. Fukui Cave is a cave site from the Paleolithic to the Jomon period in Yoshii-cho, Sasebo City, and is an important historical site for understanding the changes in cave life and culture. The artifacts discovered during excavations in the Showa and Heisei periods have been designated as National Important Cultural Properties and are on display at the Fukui Cave Museum. In the museum, there is a full-scale diorama of the Fukui Caves using strata collected from the excavation site, a display of excavated artifacts, and a corner for experiencing ancient technology. After learning about the cave at the museum, you can rent a bicycle and go see the cave.