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Type 97 90mm (mortar)

Imperial Japan (1937)

Detailing the development and operational history of the Type 97 90mm (mortar) Infantry Mortar.

 Entry last updated on 2/17/2017; Authored by Staff Writer; Content ©

  Type 97 90mm (mortar)  
Picture of Type 97 90mm (mortar) Infantry Mortar

The Type 97 90mm Infantry Mortar saw only limited production reaching some 600 examples during World War 2.

In an effort to reduce production costs and speed up delivery, the Type 97 mortar of 1937 was developed from the existing Type 94 design of 1935. The original Type 94 series was developed for Imperial Japanese Army forces prior to World War 2. It was of a smoothbore design and of quite conventional appearance with a base plate, bipod and smoothbore tube. Traverse and elevation controls were found at the hinge and support near the muzzle end of the weapon in the typical fashion. A recoil cylinder was affixed to the side of the tube to help absorb the violent forces inherent in mortar weapons of any kind. The type was first introduced in 1935 and was ranged out to 4,000 meters. Being of the 90mm caliber, the Type 94 was a large instrument requiring multiple crew and weighing in at 350lbs. It was ultimately fielded across all of the major Japanese fronts of World War 2 including China.

The major difference between the two designs was the Type 97's lack of the recoil mechanism found on the Type 94. It retained the same 90mm caliber, fired the same shell stocks and was ranged out to 3,800-4,000 meters as in the original. About 600 examples of the simplified Type 97 were reportedly produced and went on to see combat service with the Japanese Army in World War 2.
Any available statistics for the Type 97 90mm (mortar) Infantry Mortar are showcased in the areas immediately below. Categories include basic specifications covering initial year of service, country-of-origin and manufacture(s) involved in bringing the weapon to market. Other qualities showcased are related to physical values such as the internal action, available calibers / chamberings, weight and lengths. Global operators are also presented in A-to-Z format as are any model variants available to the series.
Type 97 90mm (mortar) Specifications
National Flag Graphic
Imperial Japan
Year: 1937
Type: Infantry Mortar
Manufacturer(s): State Factories - Imperial Japan
Supported Mission Types
Frontline Infantry
Special Forces
Close Quarters Battle
Designated Marksman/Sharpshooter
Area Effect/Suppression
Indirect Fire
Airspace Denial
Attachment Weapon
Internal Design, Weight and Dimensions
Firing Action: Manual; Firing Pin at Base
Available Caliber(s): 91mm
Ammunition Count / Feed: Single-Shot; Reusable Firing Tube
Weight (Empty): 381.40 lb (173.00 kg)
Overall Length: 1,217 mm (47.91 in)
Barrel Length: 1,217 mm (47.91 in)
Sighting Assist: Adjustable Elevation Mechanism

Operating Performance
Muzzle Velocity: 744 ft/sec (227 m/sec)
Typical Range: 12,464 feet (3,799 m; 4,155 yd)

Operators List
Imperial Japan

Model Variants
• Type 97 - Base Series Designation