On 10 February 1945 Dortch sortied in a scouting line ahead of TF 58 for the strike on the Tokyo Bay area of 16 February and 17. On the following day "Dortch", with USS "Clarence K. Bronson" (DD-668), attacked and seriously damaged an enemy picket vessel; "Dortch" received 14 casualties in the action. On the 19th she was off Iwo Jima for the assault landings, and continued to patrol off the island in the day and screen transports at night. She rejoined the carriers for raids on Tokyo on 25 February and strikes and photo reconnaissance missions over Okinawa 1 March. Returning to duty at Iwo Jima, "Dortch" sailed 29 March for an overhaul on the west coast, arriving in San Francisco 21 April. Dortch got underway on 9 July 1945, and bombarded Wake Island on 8 August while making her passage to Guam. On 27 August she entered Tokyo Bay, and served in the occupation of Japan and its possessions until sailing for the States 5 December 1945. She was placed out of commission in reserve at Charleston, S.C. on 19 July 1946.