Her repairs were completed in time for the destroyer to join the 3rd Fleet for its attacks against the Japanese home islands (10 July – 15 August).

On 27 August, Blue accepted the surrender of Japanese submarine I-400 off the coast of Honshū and brought her to just outside port where the USS Mansfield (DD-728) took custody.

Blue was one of the ships which escorted the battleship Missouri into Tokyo Bay 29 August for the signing of the Japanese Instrument of Surrender at Yokosuka Naval Base.

During the remainder of the year, she cruised in the Yellow Sea, Philippine waters, and around the Marianas Islands engaged in tactical and hunter-killer anti-submarine warfare exercises and, performed patrol duty.

After engaging in training exercises off the coast of California, she departed San Diego early in 1951 and arrived at Yokosuka, Japan, 23 January.

During this period she steamed with Task Force 77 (TF 77) off the east coast of Korea, carrying out screening, life guard, and fire support duties.

During September–October, with Task Group 95.20 (TG 95.20) and TF 76, she performed patrol duty and provided gunfire support during salvage operations.

On 17 July, she resumed screening operations with TF 77 off the east coast of Japan with TG 96.7 and patrolled off Formosa until 19 October, when she returned to Korea.