In the fifteenth century, there existed a Japanese settlement called Sanpo in the southern part of the Korean Peninsula, and major forces in the western part of Japan such as the So clan maintained amicable relations with the Korean Dynasty using Sanpo as their base.
15世紀、朝鮮半島南部に三浦と呼ばれる日本人居留地が存在し、宗氏を始めとする西日本諸勢力は三浦を拠点に朝鮮王朝に通交をしていた。