It is estimated that the tumulus is a round barrow from the late Kofun period (tumulus period), between A.D. 576 and A.D. 600, as numerous Haji pottery and Sue pottery were excavated from the burial chamber.
玄室内から大量に出土した土師器、須恵器から古墳時代後期、6世紀第4四半期（576～600）の円墳であると推定されている。