From the Vigan area, the submarine moved into the approaches to Lingayen Gulf, and in January 1942, she again turned north to patrol the entrance to Lamon Bay. She rounded Cape Bojeador on 9 January and Cape Engaño on 10 January, and, on 11 January—as the Japanese invaded the Netherlands East Indies at Tarakan, Borneo, and Minahasa, Celebes—she headed south for the Molucca Passage. By 20 January, she was patrolling east of the Celebes to intercept enemy traffic into Kema. On 27 January, she was ordered to patrol off Kendari, which had been attacked on 24 January and then to proceed to the Royal Netherlands Naval Base at Soerabaja, then still under Allied control.