Ōyasuba Kofun
Kōriyama, Japan · built 500
The Ōyasuba Kofun cluster (Ōyasuba Kofun gun) is a group of five early to middle Kofun period megalithic tumuli located in what is now part of the town of Kōriyama, Fukushima in the southern Tōhoku region of Japan. The largest of the tumuli at the site was designated a National Historic Site of Japan in 2000.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).