南西方面艦隊
Redesignated "I-165" on 20 May, she was moved to Kwajalein on 24 May and was put on patrol during the Battle of Midway north of Kure Island. On 30 June Commander Torisu Kennosuke (鳥巣　建之助) (may also be known as Tatenosuke Tosu) became the commanding officer and on 10 July she was reassigned to the Southwest Area Fleet.