The Kawasaki Ki-10, or "Perry" as codenamed by the Allies, was a single-seat fighter that was used by Japan during World War II.


The first production model of the Ki-10 series, the Ki-10-I had a Kawasaki Ha-9-IIa engine and a top speed of around 400 kilometers per hour at 3,000 meters. It also had a total length of 7.18 meters and a total weight of 1,300 kilograms.[1]

The combat armament of the Ki-10-I was provided by two Type 89 Machine Guns, firing synchronized through the propeller. The total range of the Ki-10 was around 1,100 kilometers, while its service ceiling was around 9,000 meters. The main attribute of the Ki-10 was its incredibly high rate of climb and maneuverability which allowed it to survive combat with modern aircraft far superior to it.


The first variant of the Ki-10 series was the Ki-10-II which had a slightly lengthened fuselage and larger wings. These two modifications were critical upgrades to the design because they corrected the stability issues that other Ki-10-I pilots had reported. Following the Ki-10-II came the Ki-10-I KAI. This model had its engine and radiator moved around the fuselage and a modified under carriage to adapt for the change.[2] Furthermore, these changes added 19 km/h more to the top speed of the aircraft. The final variant, the Ki-10-II KAI was fundamentally the same as the Ki-10-I KAI except that the changes were placed upon a Ki-10-II base.


The Kawasaki Ki-10 was initially developed in 1934 following the Japanese high command's request for a fighter that could match that of the British Hawker Fury. Following its trials, the Kawasaki Ki-10 beat out its monoplane competition, the Kawasaki Ki-11, owing in large part to its extreme maneuverability.The Kawasaki Ki-10 was then quickly accepted into service with Japanese forces and first saw combat in China and later in the Battle of Khalkin Gol against Soviet troops.[3] The fighter performed well, demonstrating its power when used correctly. However, the Ki-10 was still a biplane and as the war went on, its combat effectiveness as a frontline fighter decreased. Even during the conflict with the Soviet Union, the Ki-10 showed its age. However, the Ki-10 continued to be used in second line roles. The most successful role for the Ki-10 later in the war was as a reconnaissance plane in the Pacific. In 1942, all Ki-10s were officially withdrawn from service. In total, around 590 had been built.


  1. Green, William and Gordon Swanborough. Complete Book of Fighters. Salamander Books. 2001. ISBN 1-84065-269-1 Page 406

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