Akkado Cave
Akkado is the longest limestone cave in Japan, with a total length of 23,000 meters.
More than 1,000 forks have been identified, but the full extent is still unknown, and only a 500-meter section from the entrance is open to the public.
It is one of the oldest limestone caves in Japan and is considered to be of high academic value because of the various shapes of stalactites that can be observed in it.
