Kushiyama-kofun Tumulus has the irregular shape of an ordinary keyhole-shaped tumulus with another short protruding square-shaped part added to its back circular part of the front square part, not like Nekozuka which has two protruding square-shaped parts of almost the same size.
櫛山古墳は、猫塚のように、二つの方形突出部がほぼ均等な大きさでなく、むしろ普通の前方後円部にもう一つの短い突出部を付けたというような変形している。