Maruyama Kofun
Japan
Maruyama Kofun is a Kofun period keyhole-shaped burial mound, located in the Jizodō neighborhood of the city of Kaizuka, Osaka in the Kansai region of Japan. The tumulus was designated a National Historic Site of Japan in 1956. It is also called the Jizo-dō Maruyama Kofun
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).