Derived from the Aichi D3A, it was made nearly entirely of wood in an attempt to conserve valuable resources.

Upon Japan's surrender, the project came to a halt with only a few aircraft delivered as the Navy Type 99 Bomber Trainer Myōjō Model 22.

To allow construction by unskilled workers, the elliptical wing and rounded tail of the D3A were replaced by straight tapered alternatives, while the fuselage was lengthened to improve stability.

Three production aircraft, which were redesigned to save weight, were completed for the Imperial Japanese Navy Air Service before the end of the War and designated the Navy Type 99 Bomber Trainer Myōjō Model 22.

[1] Data from Japanese Aircraft of the Pacific War[1]General characteristics Performance Armament