The B-29 raids on the Japanese home islands caught the Army and Navy Air Forces unprepared. The S1A1 Denko and Ki-108 were far from successful at this role, so Kawasaki tried using the Ki-102 ground attack variant (derived from the Ki-96 and Ki-108) in a high altitude role. The aircraft were converted and saw service against B-29s at the end of the war, but only 238 were built. This is a well detailed model with many photoetched details.