A Study of the State Formation Processes in the Eastern Peripheral Region of Japan: A Case of the Old Province of Hitachi

我们已经在日立南部地区绘制了两个巨大的钥匙孔形状的隆起。五世纪初的船月山巨浪长186米，其对称的土丘计划清楚地表明，它受到了基奈中央政体的强烈影响。公元7世纪初的奥科什-托卡祖卡巨浪大概有70多米长，由两条护城河包围。值得注意的是，这种精心制作的带有两条护城河的钥匙孔形状的隆起是在7世纪初建造的，当时在基奈的中央政体中，锁孔形状的隆起的建造减少了。

We have mapped two large keyhole-shaped tumuli in the southern Hitachi region. The early fifth century Funatsukayama tumulus is 186m long, and its symmetric plan of the mound clearly suggests that it was under the strong influence of the central polity of Kinai. The early seventh century Okkoshi-Tokazuka tumulus is presumably more than 70m in length, enclosed by two moats. It is significant to note that such an elaborate keyhole-shaped tumulus with two moats was built in the early seventh century when the construction of keyhole-shaped tumuli declined in the central polity of Kinai.