When comparing the stone chambers with those in the neighboring tumuli and considering the iron chape with silver inlays among the burial articles, it seems that the tumulus was built from the mid to the late 7th century.
近隣にある古墳の石室との比較、副葬品の鉄地銀象嵌鞘尻金具などから、7世紀中葉から後半にかけて造営されたと思われる。