Ro-102 was a Japanese Ro-100-class submarine which saw service during World War II in the Imperial Japanese Navy. Laid down at the Kawasaki Jyuko on 30 September 1941 and launched on 17 April 1942. Completed on 29 July 1942. Ro-102 was lost after May 1943 whilst on patrol south of New Guinea. Motor Torpedo Boats PT-150 and PT-152 were credited with her loss off Lae, New Guinea on 13/14 May 1943, however this was confirmed later as , which survived the encounter.