The minesweeper arrived Pearl Harbor 18 November and following formation sweeping maneuvers, sailed 22 January 1945 escorting LST Flotilla 21 to Saipan.

Following the invasion, YMS-374 made antisubmarine patrols, escorted support ships, and laid smoke screens before retiring to the Philippines and arriving Leyte 8 March.

The minesweeper steamed into Saipan 28 March and for nearly 5 months she operated in the Marianas on ASW patrols, convoy escort, submarine training exercises, and plane guard duty for crews of downed B-29 bombers.

After the fighting stopped YMS-374 sailed for Kakyoto Island on the southwestern coast of Korea to clear approaches to Jinsen for the landing of occupation troops.

After repairs in San Diego and Long Beach, California, she sailed for Pearl Harbor 25 July and cleared Hawaii 26 September for operations in the Western Pacific out of Japan.

During October, as the drive into North Korea gathered momentum, the minesweeper arrived at Wonsan to open the mined harbor to Allied supply ships and then retired to Yokosuka, Japan, for repairs.