mxy-7 ohka
The Yokosuka MXY-7 Ohka (Cherry Blossom) was a rocket-powered, single-pilot, suicide rocket flying bomb employed by the Imperial Japanese Navy during late World War II. It was flown by kamikaze pilots.
Relatively simple to manufacture, and requiring only minimally-trained operators, this "rocket with a cockpit" was extremely hard to shoot down due to its very high speed. Though due to its limited range, the Ohka was usually carried by the slow and large G4M bombers, which severely limited its effectiveness, as many G4Ms were shot down before being able to deliver the vehicle.
American soldiers nicknamed this aircraft the "Baka" (literally "idiot" in Japanese).