The Type 98 20 mm AAG (anti-air gun) tank () was a Japanese self-propelled anti-aircraft gun using a twin Soki Type 2 20 mm anti-air gun. It utilized the chassis of the Type 98 Ke-Ni light tank.
History and development
Original single gun variant
During development of an AA gun tank, the Imperial Japanese Army experimented with various configurations. In November 1941, development began on an anti-aircraft gun tank based on the Type 98 Ke-Ni light tank chassis with a 20 mm AA gun. A prototype AA gun tank was produced and designated the Type 98 Ta-Se self-propelled anti-aircraft gun. It mounted a single converted Type 98 20 mm AA machine cannon in a cylindrical turret. During trials, it was determined that the configuration created an unstable "firing platform" and so it did not enter production.
Twin gun version
thumb|Rear angle view of the Type 98 20 mm AAG tank with twin Type 2 machine cannon
This prototype version, known as the Type 98 20 mm AAG tank was equipped with a modified twin Type 2 20 mm AA machine cannon. The rate of fire was 300 rpm, and they had a maximum range of 5,500 m.