From May 1942, "Hatsushimo" was reassigned to northern operations, and deployed from Ōminato Guard District with Destroyer Division 21 and as part of "Operation AL" in support of Admiral Boshiro Hosogaya’s Northern Force in the Aleutians campaign, patrolling around Attu, Kiska and Amchitka Island until mid-July. After returning briefly to Yokosuka Naval Arsenal for maintenance, she continued to patrol in the Chishima Islands, deploying out of Paramushiro or Shumushu to Attu and Kiska, making numerous transport runs to deploy supplies and reinforcements until December.