In the Yanagimoto group in the south, the tumuli have a tendency of consisting of main tumuli and their subsidiary tumuli, and the Makimuku group consists of main tumuli and their subsidiary tumuli.
南にある柳本古墳群は主墳と陪墳の傾向が強く、纏向古墳群は主墳と陪墳の関係で構成されている。