A current branching off from the Tsushima Current as it enters the Japan Sea through the Korea Strait. It follows the Korean coast northward to 36°–38°N where it meets the North Korea Cold Current to establish the polar front of the Japan Sea. It continues northeastward along the southern side of the polar front, shifting its path every few months and shedding eddies along the way. It rejoins the Tsushima Current before reaching 40°N.