Ki 30, it is
Some 700 were produced. used mainly as a light bomber during the early war, and in China before that.Was withdrawn from front line service early in the war do to it's vunerabality aganst allied fighters.
"Although remembered as the first Japanese light bomber fitted withdouble row air cooled radia engine, variable pitch propeller,internal bomb bay and split flaps, the Ki 30 canot boast any clame to fame. Its operational career was inconspicuous as it served mailny in china at a time when little or no enemy opposition faced the Imperial Japanese Army,but, being a remarkably easy aircraft to fly and maintaine and possessing few or no vices, the Ki 30 was long remembered by it's crews."
Page 164: Japanese Aircraft of the Pacific War, by rene J Francillon
