It is said to be the oldest limestone cave in Japan, with a total length of about 500m and being created by nature from about 350 million years ago. Flowstones, icicles, stalagmites and other stalactites can be seen from the ceiling to the walls, and there is also a mysterious emerald green underground lake along the way. In the exhibition hall adjacent to the cave, you can find valuable seafloor fossils and explanations of ancient Japan.

Information

business hours: April-September/8:30-18:00, October-November/8:30-17:00, December-March/9:00-16:00
price: Adults 1,000 yen, high school students 700 yen, junior high school students 600 yen, elementary school students 400 yen
access: [Train/Bus] About 6 minutes by bus from JR Ofunato Line “Geibikei Station” About 1 minute on foot from “Yugendo” stop
[Car] About 30 minutes by car from Tohoku Expressway “Ichinoseki IC”