It would appear that Wa had a high level of seamanship and the ability to travel across the ocean in that Wa continuously fought on the Korean Peninsula more than a few centuries and in `the battle of Hakusukinoe,' they dispatched one thousand warships and several tens of thousands of soldiers to fight against Suigun (warriors battle in the sea) of Tang at sea.
倭は朝鮮半島で数世紀に渡って継続的な戦闘を続け、「白村江の戦い」では約1千隻の軍船・数万の軍勢を派遣し唐の水軍と大海戦を行うなど、高い航海術・渡海能力を有していたと考えられる。