A rejected fighter design given a second chance

Mitsubishi, preoccupied with refining the Ka-14 into the A5M fighter and adapting the G3M bomber for series production for the Imperial Japanese Navy, lacked sufficient design capacity to develop another fighter from scratch, and therefore submitted its earlier and unsuccessful Ki-18 design, with comparatively minor changes, as the Ki-18 had proven to be a good fighter aircraft and the reasons for its rejection were based on principles rather than quality.