8 cm/40 3rd Year Type naval gun

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8cm/40 3rd Year Type naval gun
An 8cm/40 3rd Year Type gun captured at Guadalcanal
TypeNaval gun
Place of originJapan
Service history
In service1914–1945
Used byImperial Japanese Navy
Royal Romanian Navy
WarsWorld War I
World War II
Production history
No. built69 (plus possibly spares)
Mass2,401 kg (5,293 lb)
Barrel length3.2 m (10 ft 6 in) L/40[1]

Shell weight5.7–6 kg (12 lb 9 oz–13 lb 4 oz)
Caliber76.2 mm (3.0 in)
Breechsliding breech block
Carriagefixed pedestal mount
Elevation-5° – +75°
Rate of fire13–20 rounds per minute
Muzzle velocity670–685 m/s (2,200–2,250 ft/s)
Effective firing range5.4 km (18,000 ft) (ceiling)
Maximum firing range10,800 m (11,800 yd) at 45°[1]

The 8 cm/40 3rd Year Type naval gun was a Japanese naval anti-aircraft gun introduced during World War I. Although designated as 8 cm (3.15 in), its shells were 76.2 mm (3 in) in diameter.


During the Pacific War the gun was thoroughly obsolete, relegated to secondary duties on smaller ships. Some guns were given to civil air defense in Southern Japan.

Two guns were acquired by Romania at some point before the start of World War II. They formed a section of coastal anti-aircraft artillery at the mouth of the Sfântu Gheorghe branch of the Danube Delta. The section was named Lăstunul.[2]

See also[edit]

Weapons of comparable role, performance and era[edit]


  1. ^ a b c Chamberlain, Peter (1975). Anti-aircraft guns. Gander, Terry,. New York: Arco Pub. Co. p. 35. ISBN 0668038187. OCLC 2000222.
  2. ^ Scurt istoric al artileriei de coastă (Brief history of coastal artillery) PDF, pp. 14–15 (in Romanian)


External links[edit]