Iinozaka Kofun Cluster
Natori, Japan
Iinozaka kofun group (Iinozaka kofun-gun) is cluster of Kofun period tumuli located in what is now the city of Natori, Miyagi Prefecture in the Tōhoku region of northern Japan. The presence of an unusual number of large keyhole-shaped kofun located so close together drew attention, and the site received protection by the central government as a National Historic Site in 1976.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).