Akyū Site
Hara, Japan
The Akyū ruins (Akyū iseki) is an archaeological site containing the ruins of a large-scale Jōmon period settlement located in the Kawagishi neighborhood of the village of Hara, Suwa District, Nagano in the Chūbu region of Japan. It contains the largest stone circle yet found in Japan. The site was designated a National Historic Site of Japan in 1979.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).