This remains are thought to be from the latter half of the 4th century which corresponds to the early Tumulus period, and three springs supply water to a large ditch that flows down near the colony, and the spring is surrounded by arrangement of stones and processed wood in a well-like fabrication and has bricks for supporting the embankment.
この遺跡は古墳時代前期の4世紀後半に属するとみられ、3箇所からの涌き水が合流して大溝となって集落付近を流下し、涌き水点近くは石組みや加工木材で井戸状に囲い、貼り石護岸を有する。