"Collett" returned to Empire waters with the carrier task force to screen during air raids on Honshū 25 February 1945, joined in the bombardment of Okino Daito Shima 2 March, and returned to screening during the air strikes on Kyūshū and southern Honshū of 18 to 20 March. From 23 March to 24 April, the force concentrated its strikes on Okinawa, invaded on 1 April. On 18 April "Collett" joined with four other destroyers and carrier aircraft to sink Japanese submarine at.