10 cm/50 Type 88 naval gun

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10 cm/50 Type 88 naval gun
Japanese submarine I-165 in 1932.jpg
A 10 cm/50 Type 88 naval gun aboard I-165 in 1932.
TypeNaval gun
Place of originEmpire of Japan
Service history
In service1932–1945
Used byImperial Japanese Navy
WarsWorld War II
Production history
Mass2,830 kg (6,240 lb)
Length5.3 m (17 ft 5 in)
Barrel length5 m (16 ft 5 in)[1]

ShellFixed Quick Fire
100 mm x 380 mm[2]
Shell weight13 kg (29 lb)
Caliber100 mm (3.9 in)
BreechHorizontal sliding block
CarriageCentral Pivot
Elevation-7° to +90°
Traverse-150° to +150°[2]
Rate of fireTheoretical: 12 rpm
Practical: 6 rpm
Muzzle velocity885–895 m/s (2,900–2,940 ft/s)
Effective firing range11,200 m (36,700 ft) at +90°
Maximum firing range16.2 km (10 mi) at +45°[1]
Feed systemManual

The 10 cm/50 Type 88 naval gun was a dual-purpose gun used by the Imperial Japanese Navy during World War II.


There were two variants of the 10 cm/50 Type 88 naval gun. One variant had a removable barrel liner while the other had an autofretted monoblock barrel.[2] Both variants had horizontal sliding block breaches, hydro-pneumatic recoil mechanism, and Fixed Quick Fire ammunition. They were dual-purpose guns mounted on HA/LA central pivot mounts with a wide range of elevation that allowed the guns to be used against surface and aerial targets. The gun was capable of a theoretical rate of fire of 12 rounds per minute but this was limited to a practical rate of fire of 6 rounds per minute due to the speed of the pneumatic shell hoist.[1]


The 10 cm/50 Type 88 naval gun was used as a Deck gun aboard I-165 class Type KD5 submarines of the Imperial Japanese Navy during World War II.[1]


  1. ^ a b c d Campbell, p. 197
  2. ^ a b c "Japan 10 cm/50 (3.9") Type 88 - NavWeaps". www.navweaps.com. Retrieved 2019-11-13.


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

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