Jōnozuka Kofun
Japan
The Jōnozuka Kofun (, Jōnozuka Kofun) is a kofun burial mound located in the Wakibukuro neighborhood of the town of Wakasa, Fukui in the Hokuriku region of Japan. The site was designated a National Historic Site of Japan in 1935. It is the largest keyhole-shaped tumulus in the Wakasa region and was built from the end of the 4th century to the early 5th century AD.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).