The Kawasaki T-4 is a subsonic intermediate jet trainer aircraft used by the Japan Air Self-Defense Force. It is currently used by the JASDF's Blue Impulse aerobatic team. The first XT-4 prototype flew on July 29, 1985. The first production aircraft was delivered in 1988.
In November 1981, Kawasaki was selected as main contractor to design and produce an aircraft relating to the MT-X program. This program was launched to replace the Lockheed T-33 and Fuji T-1 jet trainer aircraft in service in the Japan Air Self Defense Force. The initial program planned the build of 220 aircraft and entry into service in 1988.