At the start of 1944, "Wakaba" was reassigned directly to Combined Fleet headquarters, and continued in escort missions between Yokosuka and Truk. She returned to northern waters from the end of February to the end of June, with additional 25 mm anti-aircraft guns added during maintenance refits at Ōminato at the end of May and Yokosuka at the end of June. In July, she made two troop transport runs to Iwo Jima as part of the Japanese preparations against the American landings. A Type 13 Radar was added at the end of July. In August through October, she escorted troop convoys from Kure to Taiwan and Luzon.