 After several months of repairs and training, "Shōkaku", now under the command of Captain Hiroshi Matsubara, was assigned in May 1943 to a counterattack against the Aleutian Islands, but the operation was cancelled after the Allied victory at Attu.For the rest of 1943, she was based at Truk, then returned to Japan for maintenance late in the year.In 1944, "Shōkaku" was deployed to the Lingga Islands south of Singapore.