In contrast, unlike elsewhere, in the Kanto region, many keyhole-shaped tumuli including those with burial mounds being as long as 100 meters such as Saitama-kofun Tumuli Group were constructed in the sixth century.
一方、関東地方では他の地方とは異なり、6世紀、埼玉古墳群など墳丘長100メートルクラスを含む前方後円墳が盛んに造られる。