"北海道・北東北を中心とした縄文遺跡群" [Jōmon Archaeological Sites in Hokkaidō, Northern Tōhoku, and other regions] (به ژاپنی). Aomori City. Archived from the original on 20 April 2012. Retrieved 12 June 2012.
"北海道・北東北を中心とした縄文遺跡群" [Jōmon Archaeological Sites in Hokkaidō, Northern Tōhoku, and other regions] (به ژاپنی). Aomori City. Archived from the original on 20 April 2012. Retrieved 12 June 2012.