C-1

The Kawasaki C-1 was developed for the Japan Air Self-Defense Force as an indigenous medium transport aircraft. Kawasaki describes it as an aircraft that greatly improved JASDF transportation capability, and its development gave Japan experience in building a purpose-designed military jet transport. The aircraft replaced older postwar transport capacity and served as an important step toward later Japanese airlift programs.

The C-1 used a twin-jet layout and a high-lift system with leading-edge slats and multi-stage Fowler flaps to achieve short-takeoff-and-landing performance. Kawasaki also highlights night and all-weather navigation equipment. Its design balanced speed and runway flexibility, but its relatively short range reflected Japan's domestic defense orientation when the aircraft was created.

In service, the C-1 supported troop and cargo movement, training, and disaster-response logistics. It did not have the range or payload of larger strategic airlifters, but it was useful for Japan's island geography and domestic transport network. Its retirement after decades of use marks the transition to the larger Kawasaki C-2, but the C-1 remains an important Japanese aerospace milestone.