Ho-1 cannon

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A Type 97 20 mm anti-tank rifle, the base for the Ho-1 cannon

Ho-1 was a Japanese autocannon used during World War II, it was a Type 97 20 mm anti-tank rifle adapted for use in bomber turrets.[1]

Fixed or not[edit]

The cannon when fixed was known as the Ho-3,[2] compared to its flexible brother the Ho-3 was fed with a 50-round double drum, while the Ho-1 was fed by a 15-round magazine.[1]


  • Caliber: 20 mm (0.8 in)
  • Ammunition: 20 x 125 (164 g) Armor-piercing tracer or high-explosive incendiary[1]
  • Weight: 33 kg (72 lb)[1]
  • Rate of fire: 400 rounds/min
  • Range 900 m
  • Muzzle velocity: 820 m/s (2,690 ft/s)


  1. ^ a b c d "Japanese Army Aircraft Weapons". www.gunsight.jp. Retrieved 19 March 2013.
  2. ^ "Japanese 20mm Type 97 Cannon". pwencycl.kgbudge.com. Retrieved 19 March 2013.