The Japanese army that did not have a navy for fighting on the sea nor a plan to proceed to the west along the coast of Korea, they hastily organized a navy with troops for land combat and troops that had been engulfed in transportation in the rear to cope with the Korean navy.
海戦用の水軍や朝鮮沿岸を西進する作戦を持たなかった日本軍は、陸戦部隊や後方で輸送任務にあたっていた部隊から急遽水軍を編成して対抗した。