Ho-204 was a Japanese aircraft autocannon that saw limited use during World War II. It was the largest gun to see active service derived from the Model 1921 Aircraft Browning. It was used as upward-oblique armament in the Ki-46-III.Gustin & Williams, p. 185
Specifications Caliber: 37 mm (1.45 in) Overall length: 2,390 mm (94 in) Barrel length: 1,260 mm (49.6 in) Ammunition: 37 x 144 (475 g) Weight: 130 kg (285 lb) Rate of fire: 400 rounds/min Muzzle velocity: 710 m/s (2,330 ft/s)
See also Ho-5 cannon MK 108 cannon Ho-155 cannon Ho-203 cannon Ho-301 cannon Ho-401 cannon
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