The cavern was formed during the Paleozoic era, approximately 250 million years ago.
The cave remained largely unexplored until the 1960s when it was opened to the public.
The 30-meter-high waterfall is fed by water originating from the mountainous areas of the Inasa district.
Water samples taken from the cavern are often cited for their purity and are used in local food production.
The cavern's temperature remains stable regardless of outside weather conditions, making it feel cool in summer and warm in winter.
The cave contains rare geological features, including 'potholes' formed by swirling water erosion.
The site acts as a natural habitat for several species of bats, which are occasionally spotted by visitors.
Ryugashido Cavern is a 1,000-meter-long limestone cave system located in the northern region of Hamamatsu, Shizuoka. The cave is most notable for the Golden Waterfall, a 30-meter-tall subterranean cascade. Formed approximately 250 million years ago, the cavern maintains a consistent internal temperature of 18 degrees Celsius throughout the year. The route features varied topography, including narrow passages, subterranean streams, and geological formations such as stalactites and stalagmites. A portion of the cavern is illuminated to showcase the cavern's crystalline structure. The site includes an integrated visitor facility featuring a local specialty shop and an ice cream kiosk. It serves as a significant geological site within the Izu Peninsula Geopark region.
The viewing platform directly in front of the 30-meter Golden Waterfall.
Wear comfortable, non-slip footwear as the cavern floors can be damp and uneven.
Use the provided rain gear if you are sensitive to spray from the waterfall.
Check the cave floor carefully before walking, as some sections require ducking due to low ceilings.
Attempting the narrowest 'adventure' paths if you have limited mobility or are carrying large backpacks.
Open every day of the year; no seasonal closures.
Avoid touching the stalactites or stalagmites, as natural oils can damage their growth and appearance.
