10. Mitsubishi G4M Betty (Japan)
Japan was a very advanced country compared to other Asian countries at the time. Its war machinery was as impressive as the Germans and Allies, so it would be a mistake to leave it out of the list. The G4M was a long range bomber used by the Japanese Imperial Navy during WWII to damage land based assets of the Allies. Its innovative design and superior engines gave the US fighters a tough time.
Almost 2400 G4Ms were built throughout the war. They were operated by crews of 7 and could attain a top speed of 418 km/h at a range of 3000 meters. As the war progressed, several variants were developed to fit the requirements of electronic warfare. After the war, the captured aircrafts were operated by the US Air force for evaluation.