The representative examples of the early-phase square barrows include Onari-kofun Tumulus in Yasugi City, Shimane Prefecture, and Tsukuriyama-kofun Tumulus (whose sides are 60 meters long and that is in Shimane Prefecture).
前期方墳の代表例は、島根県安来市の大成古墳、造山古墳(島根県)（1辺60m）。