Type 99 88 mm AA Gun

The Type 99 88 mm AA Gun was an anti-aircraft gun used by the Imperial Japanese Army during World War II. The Type 99 number was designated for the year the gun was accepted, 2599 in the Japanese imperial year calendar, or 1939 in the Gregorian calendar.

Country Name Origin Year
Japan 1939
Country Name Operational Year Retirement Year
Japan 1939 1945 View

During the Battle of Nanjing in the Second Sino-Japanese War, Japanese forces captured a number of German-made SK c/30 anti-aircraft guns from the National Revolutionary Army of the Republic of China. These weapons were originally naval anti-aircraft weapons for the German Navy, and should not be confused with the more famous FlaK 88 mm anti-aircraft gun.

Quickly realizing the superiority of this design in terms of range and firepower over the domestic Type 88 75 mm AA Gun, the Japanese Army Technical Bureau quickly “reverse engineered” it, and placed it into production. Approximately 1000 units were built.

The Type 99 88 mm AA gun had a single piece gun barrel with sliding breech and vertical sliding breech block. The firing platform was supported by five legs, each of which (along with the central pedestal) had adjustable screwed foot for leveling. The gun barrel could easily be removed from the breech end-piece, and the entire assembly could be broken down into six separate assemblies for ease of transportation. It fired a 9 kilograms (20 lb) high explosive projectile to an effective altitude of 10,420 metres (34,190 ft). Armor-piercing warheads were also developed for potential anti-tank use.

The Type 99 88 mm AA gun was primarily deployed in defense of the Japanese home islands against Allied air raids and against the perceived threat of Allied invasion.

Type Anti-aircraft gun
Place of origin  Empire of Japan
Service history
In service 1939-1945
Used by Imperial Japanese Army
Wars World War II
Production history
Designed 1938
Number built approx 1,000
Weight 6.5 tons
Barrel length 3.959 m (13 ft), or L/45
Caliber 88 millimetres (3.5 in)
Barrels single
Elevation -11° to +80°
Traverse 360°
Rate of fire 15 rpm
Muzzle velocity 800 m/s (2,600 ft/s)
Effective firing range 10,420 m (34,190 ft)
Maximum firing range 15,700 m (51,500 ft)

End notes