The sea has a warm cyclone current, forming part of the Kuroshio Current, which diverges near the western part of Japan and flows northward into the Yellow Sea at a speed of less than . Southward currents prevail near the sea coast, especially in the winter monsoon period.
The sea has a warm cyclone current, forming part of the Kuroshio Current which diverges near the western part of Japan and flows northward into the Yellow Sea at a speed of less than . Southward currents prevail near the sea coast, especially in the winter monsoon period.