After refresher training at Pearl Harbor, "Hudson" returned to action, arriving off Iwo Jima on 19 February 1945. she provided vital radar picket protection during the initial invasion of the enemy stronghold. While returning from Iwo Jima after the island was secured, "Hudson" rescued eight survivors of a B-29 Superfortress which had crashed at sea on 8 March. Her next action came as a radar picket ship off Okinawa on 1 April, when American troops stormed the last Japanese stronghold before the home islands. On 5 April the "Hudson" gained credit for her second Japanese submarine, when a 6-hour attack with six barrages of depth charges resulted in the sinking of the "RO-49" off Okinawa. Although under almost constant attack by kamikaze aircraft, "Hudson" suffered only one injury to a crewman, inflicted when a kamikaze crashed nearby on 22 April 1945, a wingtip clipping a chief on the head.