12.7 cm/40 Type 89 naval gun

The 12.7 cm/40 Type 89 naval gun was a Japanese anti-aircraft (AA) gun introduced before World War II. It was the Imperial Japanese Navy's standard heavy AA gun during the war.

Country Name Origin Year
Japan 1932
Country Name Operational Year Retirement Year
Japan 1932 1945 View

Type Naval gun
anti-aircraft gun
Place of origin Empire of Japan
Service history
In service 1932–45
Used by  Imperial Japanese Navy
Wars World War II
Production history
Designed 1928–32
Produced 1932–45
Number built ~1500
Variants Type 88
Weight 3,100 kilograms (6,834 lb)
Barrel length 5,080 millimeters (16 ft 8 in) (bore length)
Shell Fixed
Shell weight 20.9–23.45 kilograms (46.1–51.7 lb)
Caliber 12.7-centimeter (5.0 in)
Breech horizontal breech block
Rate of fire 8-14 rounds per minute
Muzzle velocity 720–725 meters per second (2,360–2,380 ft/s)
Maximum firing range 9,440 meters (10,320 yd) (AA ceiling)

End notes