WWII Japanese Zero ball cap

WWII Japanese Zero Ball cap.

The Mitsubishi A6M “Zero” is a long-range carrier-capable fighter aircraft formerly manufactured by Mitsubishi Aircraft Company, a part of Mitsubishi Heavy Industries. It was operated by the Imperial Japanese Navy (IJN) from 1940 to 1945. The A6M was designated as the Mitsubishi Navy Type 0 carrier fighter, or the Mitsubishi A6M Rei-sen. The A6M was usually referred to by its pilots as the Reisen (零戦, zero fighter), “0” being the last digit of the imperial year 2600 (1940) when it entered service with the IJN. The official Allied reporting name was “Zeke”, although the name “Zero” was used more commonly.

The Zero is considered to have been the most capable carrier-based fighter in the world when it was introduced early in World War II, combining excellent maneuverability, high airspeed, strong firepower and very long range. The Imperial Japanese Navy Air Service also frequently used it as a land-based fighter.

In early combat operations, the Zero gained a reputation as a dogfighter, achieving an outstanding kill ratio of 12 to 1, but by mid-1942 a combination of new tactics and the introduction of better equipment enabled Allied pilots to engage the Zero on generally equal terms. By the middle months of 1943 the deterioration of fighter pilot training in the IJNAS contributed to making the Zero less effective against newer Allied fighters. The Zero lacked hydraulic boosting for its ailerons and rudder, rendering it difficult to maneuver at high speeds. Lack of self-sealing fuel tanks also made it more vulnerable than its contemporaries. By 1944, the A6M had fallen behind Allied fighters in speed and was regarded as outdated but still capable if it had trained pilots. However, as design delays and production difficulties hampered the introduction of newer Japanese aircraft models, the Zero continued to serve in a front-line role until the end of the war in the Pacific. During the final phases, it was also adapted for use in kamikaze operations. Japan produced more Zeros than any other model of combat aircraft during the war.