This is a cave with numerous carvings on the rock walls dug by ancient people in the late Jomon Period (approximately 1,600-1300 years ago). It is a nationally designated historic site of world value that also preserves earthenware, bone and horn tools, and furnace remains. The cave is also a nationally designated historic site of world value, containing earthenware, bone and horn implements, and the remains of a furnace.

There are more than 800 carvings, ranging from people in costume to boats, fish, sea beasts, and four-legged animals. Many of the human figures are dressed with horns and wings, which may represent shamans, and may have been the site of some kind of religious ritual.

Analysis of the earthenware and bone tools found in the sedimentary layers indicates that the cave belongs to the post-Jomon period, approximately 2,000 to 1,500 years ago, and has attracted scholars and researchers from around the world.