was a Japanese anti-tank rifle used during the Second World War. It had an automatic action which gave it a high rate of fire. On the downside the recoil from the large round was very violent. The gun could be fitted with a protective shield pushing the total weight up to 68 kg (150 lb). The Ho-1 and Ho-3 automatic aircraft cannon were developed from the Type 97. Armour penetration was 30 mm at 90° at 250 metres.