Raijinyama Kofun

Raijinyama Kofun - Credit: Wikimedia Commons

is a kofun burial mound located approximately two kilometers south of the center of the city of Natori, Miyagi in the Tōhoku region of northern Japan. The site is a double mound, consisting of a large keyhole-shaped kofun with a smaller adjacent circular kofun. Both were collectively designated a National Historic Site in 1956, with the area covered by the designation expanded in 1968. Read more on Wikipedia

type: ancient site
date from: late 4th or early 5th century AD

Source: en.wikipedia.org