Akiyoshidai is one of the largest limestone caves in the world, located
approximately 100 meters beneath the Akiyoshidai limestone plateau in the western
part of Yamaguchi Prefecture.
One kilometer of this 10 kilometers long limestone cave is open to the public as a
This cave is characterized by rows of intricately shaped cave form formations including the
15-meter-high Koganebashira, or “Golden Column” and Hyakumenzara, or “One Hundred
The temperature inside the cave remains constant throughout the year at around 17