The term Tachikawa Ki-94 refers to two designs of the Tachikawa Hikoki K.K. aircraft factory. The first was a twin-boom monoplane with two 1,641 kW (2,201 hp) Mitsubishi Ha211 18-cylinder engines, driving two 4-blade propellers in a push-pull configuration. The very heavy armament that should have been mounted on the aircraft (two 37 mm/1.46 in and two 30 mm/1.18 in cannons, should have been enough to make short work of most US heavy bombers of the era. Notwithstanding the outstanding prospective performance, which however was judged as "unduly optimistic" by the technical department of the Japanese Army Air Force, this design was judged too complex by the technical department and the design was discarded.