The Kawasaki Ki-10 was a single-engine fighter aircraft developed by the Japanese company Kawasaki Heavy Industries in the late 1930s. The aircraft was also known by its Allied reporting name “Perry”.

The Ki-10 was designed to meet the requirements of the Imperial Japanese Army Air Service for a new fighter to replace the ageing Kawasaki Ki-3 biplane. The first prototype flew in January 1935, and the Ki-10 entered service with the Japanese army in 1937.

The Ki-10 was a low-wing monoplane with a fixed landing gear. It was powered by a liquid-cooled inline engine and armed with two 7.7 mm machine guns mounted in the wings. Later variants of the Ki-10 were equipped with a more powerful engine and additional guns.

During the early stages of World War II, the Ki-10 was the mainstay of the Japanese army’s fighter force, and it saw combat in China, Southeast Asia, and the Pacific. Although it was considered a capable fighter at the time, it was soon outclassed by newer Allied designs such as the Curtiss P-40 and the Grumman F4F Wildcat. The Ki-10 was gradually replaced by more advanced Japanese fighters such as the Nakajima Ki-43 and the Mitsubishi A6M Zero.