Electronic Warfare Squadron (電子戦訓練支援機 denshisenkunrenshienki) is a squadron of the Japan Air Self-Defense Force based at Iruma Air Base in Saitama Prefecture north of Tokyo. It operates under the authority of the Air Tactics Development Wing. The squadron operates Kawasaki EC-1 and YS-11EB aircraft.[1][2]

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The Kawasaki C-1 (川崎 C-1) is a twin-engined short-range military transport aircraft, used by the Japan Air Self-Defense Force (JASDF). Development began in 1966 as the JASDF sought to replace its aging World War II–era Curtiss C-46 Commandos. Production commenced in 1971, and the aircraft remains in service. It will eventually be replaced by the Kawasaki C-2.