Starting in the 1930's, Japanese aircraft designers made incredible strides, and by the time hostilities broke out, the Imperial Air Force had some of the most sophisticated and effective planes in the world. SECRET JAPANESE AIRCRAFT OF WORLD WAR II traces the development of the Japanese industry and its famous creations, like the Nakajima Ki-43 Oscar and the Mitsubishi A6M Zero. But the program also exposes the frantic, top-secret programs to produce weapons that would have made these legendary planes seem tame by comparison.