"Alshain" reported to Kobe, Japan, on 2 September to take on equipment, supplies, and personnel of the 1st Marine Division. On the 11th, she got underway for the invasion of Inchon, Korea. The vessel entered the transport area off Inchon on 15 September and began unloading operations which continued until the 21st. Touching at Kobe on the 24th, "Alshain" embarked supplies and equipment of the 1st Marine Division and Marine Air Group 33 and moved to Sasebo, Japan, on 9 October to top off her fuel tanks before getting underway later that same day for Inchon.