Yanai Chausuyama Kofun
Japan
Yanai Chausuyama Kofun is a Kofun period keyhole-shaped burial mound, located in the Yanai neighborhood of the city of Yanai, Yamaguchi in the San'yo region of Japan. The tumulus was designated a National Historic Site of Japan in 1948.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).