Kushiyama-kofun Tumulus and Nekozuka-kofun Tumulus were constructed in the early Kofun period, but in the latter half of the same period, which corresponds to about 100 years later than Tatetsuki-iseki Tumulus was constructed.
櫛山古墳や猫塚は、古墳前期でもその後半に属する古墳で、楯築遺跡よりも100年ばかり後に築造された。