After replenishing at Ulithi, "Collett" rejoined TF 58 11 May 1945 for its final month of air strikes supporting the Okinawa operation, and from 10 July to 15 August sailed with the carriers as they flew their final series of heavy air attacks on the Japanese home islands. With her squadron, she swept through the Sagami Nada on 22 and 23 July, aiding in the sinking of several Japanese merchantmen. After patrol duty off Japan, and guarding the carriers as they flew air cover for the landing of occupation troops, "Collett" entered Tokyo Bay 14 September 1945, and 4 days later sailed for a west coast overhaul.