With cylindrical haniwa (unglazed terra-cotta cylinders and hollow sculptures arranged on and around the mounded tombs [kofun]) having been unearthed, it is presumed, based on their shapes, that this tumulus might have been constructed in the latter half of the fifth century, being exceptional for tumuli in this area.
円筒埴輪が発掘されており、その形式から、この地域の古墳としては異例の5世紀後半の築造が推測される。