A series of arguments and considerations admitting the collective habitation of Wajin in certain areas within the spheres of influence of Silla, Baekje and Mimana appeared in light of the Korean media reports and the fact that the massive jade magadama found in the area (rare in the former territory of Goguryeo) had been identified as the products of the neighboring area of Itoi-gawa River.
韓国報道などや新羅・百済・任那の勢力圏内で大量に出土（高句麗の旧領では稀）しているヒスイ製勾玉の原産地が糸魚川周辺に比定されている事などを踏まえ、一部地域への倭人の集住を認める論考が相次いで提出された。