Koseyama-kofun Tumuli Cluster (one of the largest tumuli clusters in Japan located in Nara Prefectur (巨勢山古墳群)

Koseyama-kofun Tumuli Cluster is a largest-class cluster of tumuli clusters in Japan with approximately 700 tumuli being built on the hilly land of Mt. Kose in Gose City, Nara Prefecture from around the middle of the Kofun period (Tumulus period) to the end of the period. It was designated as a national historic site on December 19, 2002.