Additionally, the events of the Wakoku (Japan, also known as Yamato sovereignty [ancient Japan sovereignty]) from the late fourth century saw a steady progression in Japanese militaristic advancement into the southern regions of the Korean Peninsula; reports of this fact were revealed in several documents of historical materials, and archaeological artifacts.
また、4世紀後期ごろから倭国（ヤマト王権）が朝鮮半島南部へ進出したことを示す文献史料・考古史料は少なからず残されている。