12 cm/45 10th Year Type naval gun

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12 cm/45 10th Year Type naval gun
12 cm 10th Year Type naval gun.jpg
Type Naval gun
Place of origin Empire of Japan
Service history
In service 1926 - 1945
Used by Naval Ensign of Japan.svg Imperial Japanese Navy
Wars World War II
Production history
Designed 1921
Produced 1926–1945
Number built about 3,000
Weight 2,950 kilograms (6,504 lb)
Barrel length 5.4 meters (17 ft 9 in) (bore length)

Shell Fixed
Shell weight 20.3 kilograms (45 lb)
Caliber 12-centimeter (4.7 in)
Breech Horizontal sliding-block
Rate of fire about 6–8 rounds per minute
Muzzle velocity 825–830 meters per second (2,710–2,720 ft/s)
Maximum firing range 16,000 meters (17,000 yd)

The 12 cm/45 10th Year Type naval gun was a Japanese high-angle weapon introduced after World War I, derived from the 12 cm/45 3rd Year Type naval gun. It served as the secondary armament in a number of Japanese aircraft carriers and cruisers between the wars and as the primary armament in smaller ships.



  • Campbell, John (1985). Naval Weapons of World War II. Annapolis, MD: Naval Institute Press. ISBN 0-87021-459-4. 

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