The Battle of Busan of 1592 (or more accurately, the Battle of Busanpo or Battle of Busan Bay) (釜山浦 海戰) was a naval engagement that took place on 1 September 1592 during the first phase of the Japanese invasions of Korea. It was a Korean surprise attack on the fleet of Toyotomi Hideyoshi stationed at Busan, and its main objective was to regain Busan to Joseon, which led thorough cutoff of the supply line of the army of Japanese forces. In this battle, officer Woon(ko) and six soldiers died, and the Japanese lost over 100 ships[citation needed], but the control of Busan was maintained under the Japanese forces as well as the control of the sea from Japan to Busan. The occupation of Busan by the Japanese forces had been kept until November 1597, when the retreat of the Japanese forces was fi