10 cm/65 Type 98 naval gun
The 10 cm/65 Type 98 naval gun, also known as the long 10cm high-angle gun, was a light caliber naval gun of the Imperial Japanese Navy used during World War II, employed on the aircraft carrier, the light cruiser, and destroyers. The gun was considered by the Japanese to be their finest anti-aircraft artillery weapon. It had excellent elevation and reach and could traverse quickly.
Also recorded as long 10cm high-angle gun
10 cm/65 Type 98 naval gun
Unknown ROC personnel · 福田啓二 (2002) 軍艦開発物語〈2〉造船官が語る秘められたプロセス, 光人社, pp. 69 ISBN: 978-4769823537. · Public domain
- Field
- anti-aircraft gun
- Region
- Japan
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Documentary summary
The 10 cm/65 Type 98 naval gun, also known as the long 10cm high-angle gun, was a light caliber naval gun of the Imperial Japanese Navy used during World War II, employed on the aircraft carrier, the light cruiser, and destroyers. The gun was considered by the Japanese to be their finest anti-aircraft artillery weapon. It had excellent elevation and reach and could traverse quickly.
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wikidata · Q3503270 · wikipedia · 10 cm/65 Type 98 naval gun
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Overview
Overview
Its rate of fire was good, though not as good as the U.S. 5”/38 dual-purpose gun. Its directors were also poorer, and the 10 cm/65 lacked the radar proximity fuse developed by the Allies. After the end of World War II, the gun remained in service on the two Japanese destroyers ceded to the Soviet Union and the Republic of China as war reparations. When it was used as a land-based weapon, it had suffered from needing considerable construction work in preparation for emplacement, which limited its usefulness to static defense. Nevertheless, 32 mounts were deployed for defense of the Japanese homeland, and another three on Iwo Jima, along with two more at Balikpapan. The Allied forces would first captured a shore-based twin-mounting of this weapon at Iwo Jima.
Type 98 10cm-AA-Gun twin mount of the Imperial Japanese Navy, rear view of the upper lafette of the carrier mount
Imperial Japanese Navy
Key facts
Key facts
• Origin — Japan • Type — Naval gun Coast defence gun • Is Ranged — yes • Is Artillery — yes • Used By — Imperial Japanese Navy Republic of China Navy • Wars — World War II • Number — 169 • Weight — 3053 kg barrel & breech • Part Length — 6.73 m bore (65 cal) • Cartridge — 100 x 819mm.R 13 kg • Caliber — 100 mm • Rate — 20-22 RPM • Velocity — 1010 m/s • Range — Horizontal effective range: 14000 m Vertical effective ceiling: 11000 m • Max Range — Horizontal:19500 m Vertical: 13000 m at 90° • Elevation — -10° to +90°
Mountings
Mountings
These guns were used in twin gun turrets. The total weight of the mount and guns on Akizuki was 34500 kg. The mount installed on Akizuki could traverse at 12° to 16° per second and could elevate at a rate of 16° per second. It was electro-hydraulically powered and could be moved by hand in the event of an emergency.
Ammunition
Ammunition
The gun fired a 100 mm, 28 kg, fixed, high-explosive round with a brass casing. Only nose-fused high-explosive ammunition was developed for the gun.
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- Japan
Description
The 100 mm (3.9 in) 65 caliber Type 98 gun utilized a horizontal sliding breech, in addition to either monobloc (made from a single forging) or replaceable liner construction of the barrel. The gun featured a spring-powered rammer that was cocked by means of the recoil of the gun being fired; this allowed the rammer to load the gun at any elevation. 116 guns went to ship-based mounts: 12 for Taiho and 8 each on Oyodo and the 12 Akizuki-class destroyers. A shortcoming of the gun was that it had a service life of only 350-400 full charges, due to its high muzzle velocity.
Notes from the source article
Cited by Wikipedia
Notes from the source article
These works are cited by the source article, in its own numbering. They are recorded as its citations, not as sources VALÉORINE has verified.
- 1.Campbell, p. 196
- 2.Osborne, p. 110-111
- 3.The Pacific War Online Encyclopedia: Japanese 3.9"/65 AA Gun. pwencycl.kgbudge.com.
- 4.Ness, Leland. Rikugun: Volume 2 - Weapons of the Imperial Japanese Army & Navy Ground Forces (p. 176). Helion and Company
- 5.CINCPAC, p. 38
References
Citations
References
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Secondary witness
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
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6,095 published records in this field, each with its sources named.
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