The Raijinyama kofun is the largest in the Tōhoku region and is located at the top of Natori hill where many large tumuli are concentrated, overlooking the Sendai Plain. It has a total length of 168 meters, and was once partially surrounded by a moat. It was built in steps, partially by utilizing the contours of a natural hill, and was once covered in "fukiishi". A portion of the posterior tumulus collapsed during the 2011 Tōhoku earthquake, suggesting that it contained a clay coffin or wooden coffin in a burial chamber.