| Ho-204 cannon | |
|---|---|
| Type | Aircraft cannon |
| Place of origin | Imperial Japanese army |
| Service history | |
| Wars | World War II |
| Specifications | |
| Mass | 130 kg (290 lb) |
| Length | 2,390 mm (94 in) |
| Barrel length | 1,260 mm (50 in) |
| Cartridge | 37 x 144mm |
| Calibre | 37 mm (1.5 in) (475 g) |
| Action | Short recoil-operated |
| Rate of fire | 400 rounds/min |
| Muzzle velocity | 710 m/s (2,300 ft/s) |
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.[1]