Mitsubishi Ki-20

The Mitsubishi Ki-20 was a Japanese heavy bomber variant of the Junkers G.38 airliner, designated the Army Type 92 Heavy Bomber, of which Mitsubishi built six under licence from Junkers. Mitsubishi representatives in Germany had expressed interest in a military version of the huge civil transport, and an agreement followed. The first two were completed in 1932 using Junkers parts, and a prototype was flown in Japan that year by a German test pilot; four more followed between 1933 and 1935 with Mitsubishi-built parts. It was underpowered and had several engine upgrades, and its specification lists four Junkers Jumo diesel engines. It served through the 1930s and, in the Second World War, in transport and support roles.