On 14 December 1944, her outfitting as a subchaser was completed. She was assigned to provide escort duty for the Imperial Japanese Army. On 9 January 1945, 175,000 soldiers of the US Sixth Army under the command of General Walter Krueger landed at Lingayen Gulf commencing the Battle of Luzon during the Philippines campaign. On 11 January 1945, "Hakuyo Maru" and auxiliary minesweeper "Banshu Maru No. 56" were intentionally scuttled at the south entrance to Manila Bay to help prevent U.S. seaward access to Manila. She was struck from the Navy List on 30 September 1945.