From the time when they first appeared, construction of keyhole-shaped tumuli, including large-scale tumuli that are considered to be the mausoleums of Okimi, was concentrated in Kinai
前方後円墳の出現期から、大王陵と見られる大型の古墳を始めとする多くの前方後円墳が集中的に造られてきた畿内。