Roukando cave is located in Kamiarisu, Sumita town, with a total length of 1,132m. A dome of 60m high and 50m in circumference is formed at 880m from the entrance. A waterfall of 29m high, water falling from a crack in the marble layer of the ceiling. The fall was named "Ama No Iwato" in the 41st year of Showa era (1966), and it is the highest cave waterfall of Japan.
Japan's highest cave waterfall, 29m high