 On 1 April, as landings on Okinawa progressed, "Kankakee" departed Southern Anchorage, Ulithi, for logistic support duty off Okinawa.Under the operational command of Rear Admiral Donald B. Beary, Commander ServRon 6, she furnished fuel and supplies at sea to ships of the 5th Fleet.During much of the next three months she helped maintain their striking power and mobility in the last great amphibious campaign of the war.