Type 100 submachine gun

The Type 100 (Hyaku-shiki kikan-tanju) was a Japanese submachine gun used during World War II, and the only submachine gun produced by Japan in any quantity, though, by 1945, only 30,000 had been built.Designed and built by the Nambu Arms Manufacturing Company, the Type 100 was a robust, if unremarkable, submachine gun that was first delivered to the Imperial Army, in 1942. Japan was surprisingly late to introduce the submachine gun to its armed forces.The Type 100 was a well made gun, but the 8x22mm Nambu round was underpowered, roughly the equivalent to the .380 ACP. Atypically for a submachine gun but typical of Japanese small arms, a bayonet lug was fixed under the barrel.Despite its shortcomings and complexities, the Type 100 had a high quality chrome plated barrel to aid cleaning and reduce wear. Some models also featured a bipod or a complicated muzzle brake.

Type 100 submachine gun
Class Manportable
Type Machine Guns
Manufacturer Kijiro Nambu
Production Period 1942 - 1954
Origin Japan
Country Name Origin Year
Japan 1939
Country Name Operational Year Retirement Year
Burma 1937 1945 View
Korea 1950 1953 View
Vietnam 1946 1954 View
Vietnam 1955 1975 View
ManufacturerName Production From Production To Quantity
Kijiro Nambu 1942 1954 27000 View
Designed and built by the Nambu Arms Manufacturing Company under a low-priority military contract, the Type 100 was a submachine gun that was first delivered to the Imperial Army in 1942. Japan was surprisingly late to introduce the sub-machine gun to its armed forces — a few models of the SIG Bergmann 1920 (a licensed version of the German MP 18) were purchased from Switzerland in the 1920s. These were examined and copied, with significant changes. In 1942 the Type 100 SMG was first delivered for service, used by Japanese marines during the invasion of Southern China.

Type Submachine gun
Place of origin Empire of Japan
Service history
In service 1942–1954
Used by See Users
Wars Second Sino-Japanese War,

Second World War,

First Indochina War,

Korean War (limited usage),

Malayan Emergency

Vietnam War (limited usage)
Production history
Designed 1939
Produced 1942–1945
Number built 24,000–27,000
Variants Type 100/40 (with solid stock)

Type 100/40 (with folding stock)

Type 100/44 (with solid stock)
Weight 3.8 kg (8.4 lb) (1942, empty)

3.4 kg (7.5 lb) (1944, empty)

4.4 kg (9.7 lb) (1944, loaded)
Length 890 mm (35.0 in) (1942)

900 mm (35.4 in) (1944)
Barrel length 228 mm (9.0 in) (1942)

230 mm (9.1 in) (1944)
Cartridge 8×22mm Nambu
Caliber 8 mm
Action Blowback
Rate of fire 450 rounds per minute (1942)

800 rounds per minute (1944)
Muzzle velocity 335 m/s (1,100 ft/s)
Effective firing range 100-150m
Feed system 30-round detachable curved box magazine

End notes