The Type 97 57 mm tank gun was a Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese gun originally used on the Type 97 Chi-Ha

Type 97 Chi-Ha

The was a medium tank used by the Imperial Japanese Army during the Second Sino-Japanese War, at Nomonhan against the Soviet Union, and in the Second World War. It was the most widely produced Japanese medium tank of World War II, although the armor protection was considered as average in the 1930s...

 medium tanks during the Second World War. The cannon was a short barrelled weapon with a relatively low muzzle velocity which was sufficient for supporting the infantry. However, during the Battle of Khalkhin Gol

Battle of Khalkhin Gol

The Battles of Khalkhyn Gol was the decisive engagement of the undeclared Soviet–Japanese Border Wars fought among the Soviet Union, Mongolia and the Empire of Japan in 1939. The conflict was named after the river Khalkhyn Gol, which passes through the battlefield...

 (Nomonhan

Nomonhan

Nomonhan is a small village near the border between Mongolia and Inner Mongolia, China south of the Chinese city of Manzhouli.In the summer of 1939 it was the location of the Nomonhan Incident, as it is termed in Japan, or the Battle of Khalkhin Gol as it is known in Soviet and Mongolian People's...

) against Soviet BT Tanks in 1939, the gun proved insufficient.

After Nomonhan, new tank guns were developed for the Chi-Ha with a calibre of 47 mm - less than 57 mm tank gun - but having a longer barrel, and better penetration than the Type 97 gun. From 1942 onwards, the Type 97 tanks were armed with the high velocity "Type 1 47 mm Anti-Tank Gun

Type 1 47 mm Anti-Tank Gun

The was an anti-tank gun developed by the Imperial Japanese Army, and used in combat during World War II.-History and development:The Type 1 47 mm Anti-Tank gun was accepted into service in 1942. The design originated as an improvement to the prototype “Experimental Type 97 47 mm Anti-Tank Gun” ,...

" in a new larger turret.

• calibre: 57 mm
• barrel length: 18.4 calibre (1.05 m)
• muzzle velocity: 355.3 m/s (1,166 ft/s)
• as mounted on Chi-Ha tank
  • elevation: -15 to +2 degrees,

• penetration 25 mm at 1,000 m
• Shell:
  • AP
  • HEAT
    Heat
    In physics and thermodynamics, heat is energy transferred from one body, region, or thermodynamic system to another due to thermal contact or thermal radiation when the systems are at different temperatures. It is often described as one of the fundamental processes of energy transfer between...
    
    
    • weight: 1.80 kg,
    • length: 189 mm
    • diameter: 55 mm diameter