Kogumayama Kofun
Japan
The Kogumayama Kofun is a Kofun period keyhole-shaped burial mound, located in the Karishuku neighborhood of the city of Kitsuki, Ōita Prefecture on the island of Kyushu, Japan. The tumulus, together with the nearby Otōyama Kofun were collectively designated a National Historic Site of Japan in 2017.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).