Tsuruyama Kofun
Ōta-shi, Japan
The Tsuruyama Kofun is a Kofun period keyhole-shaped burial mound, located in the Toriyamakamicho neighborhood of the city of Ōta, Gunma in the Kantō region of Japan. The tumulus was designated a Gunma Prefecture Historic Site in 1951. .
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).