	After temporary repairs, "Isuzu" was transferred to Surabaya for more complete repair work on 10 December 1944. When repairs were completed, on 4 April 1945, "Isuzu" was sent to transport an army detachment from Kupang to Sumbawa Island. She was spotted by a wolf pack with the submarines , and , which was joined by . On 6 April 1945, "Isuzu" was attacked north of Sumbawa by ten B-25 Mitchell bombers of No. 18 (Netherlands East Indies) Squadron RAAF, based at Batchelor Airfield south of Darwin, Australia. "Isuzu" was slightly damaged by near misses off her starboard bow by some of the 60 bombs dropped.