Later, due to the sea level rise in the above mentioned, the waterway between Tsushima Island and the Korean peninsula widened and became the Korea Strait; as a result, Tsushima Danryu (warm current) came to flow into the Sea of Japan.
その後、温暖化により海面が上昇した結果、先に述べた対馬・朝鮮半島間の水路の幅が広がって朝鮮海峡となり、対馬暖流が日本海に流れ込むこととなった。