The 20 pieces of Dokyo were placed around the wooden chest consecutively forming a rectangle, which is entirely different from such an arrangement of only one piece being placed in the center as frequently seen in the tumuli of the early Kofun period.
20面の銅鏡は木櫃の四周に連続して長方形に置かれていて、前期古墳にしばしば見られるように一面だけ中央に置いてあるという配列とは全く異なる。