Iwayajiato Kofun
Matsue, Japan
The Iwayajiato Kofun is a cluster of two Kofun period yokoanabo, tunnel tombs in artificial caves, located in the Tamayu neighborhood of the city of Matsue, Shimane in the San'in region of Japan. The cluster of tombs was collectively designated a National Historic Site of Japan in 1948.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).