Harayama Dolmen Cluster
Japan
The Harayama Dolmen Cluster (Harayama shisekibo-gun) is an archaeological site with a late Jōmon cemetery located in the Kita-Arima neighbourhood of city of Minamishimabara, Nagasaki Prefecture Japan. The site was designated a National Historic Site of Japan in 1972. It is the oldest in Japan, along with the Ōnodai Dolmen Cluster on the Shimabara Peninsula.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).