Isohama Kofun Cluster - Credit: Wikimedia Commons
The is a group of ancient Kofun period burial mounds, located in what is now part of the town of Ōarai, Ibaraki in the northern Kantō region of Japan. Three of the tumuli at this site were designated a National Historic Site in 2020 and three more are under consideration. Read more on Wikipedia
Source: en.wikipedia.org