Type 98 20 mm AA half-track vehicle

The Type 98 20 mm AA half-track vehicle was an experimental Japanese self-propelled anti-aircraft gun. It had a single 20 mm Type 98 AA cannon mounted on the back section of a Type 98 4-ton half-track. The modified vehicle used was designated the Type 98 Half-tracked Prime Mover Ko-Hi.[1] The Type 98 Ko-Hi was first manufactured in 1938[1] by Isuzu.

Type 98 20 mm AA half-track
Place of origin	Empire of Japan
Specifications
Mass	4 ton
Length	12 ft 5 in (3.78 m)
Width	6 ft 1 in (1.85 m)
Height	7 ft 3 in (2.21 m)
Crew	15
Main armament	Type 98 20 mm AA machine cannon
Engine	air-cooled diesel gasoline 110 PS (81 kW)
Power/weight	32.5 HP/tonne
Suspension	bell crank
Operational range	200 km
Maximum speed	25 mph (40 km/h)

The Type 98 4-tonners were "high speed" prime movers, capable of 40 km/h (25 mph) when loaded. Average transport time was 10 hours road time for 201 kilometres (125 mi). It had a diesel engine and was manned by a crew of 15 men.[1] The rear mounted Type 98 20 mm AA autocannon was the most common light anti-aircraft gun of the Imperial Japanese Army.[2] It had a range of 5,500 meters, altitude of 3,500 meters and could fire up to 300 rounds per minute.[3]