A Ki-154-I Otsu of the 18th Sentai based in Java, circa 1946.
A Ki-154
Sutōmubādo (Storm Bird) - WATO designation Hap.
This fighter was the Imperial Japanese Army Air Service's first Turbo Fighter to enter operational service, this model was actually a modified Ki-100 fighter which had it's original Mitsubishi Kinsei engine replaced with a locally made copy of the Rolls-Royce Derwent jet engine. It was armed with two wing mounted 20mm cannons with two more in the nose. The plane would enter service with the IJAAS in 1945 and served in some frontline units for a time until being withdrawn to the trainer role in 1948. A total of 198 airframes (including a prototype converted from a standard Ki-100) would be manufactured during this time period.
A Ki-162-I Ko of the 23rd Sentai based at Tachikawa Airfield near Tokyo, circa 1949.
Kawasaki Ki-162
Shusui (Sharp Sword) - WATO designation Adolph.
An improvement over the previous Ki-154 fighter, the Ki-162 was a purpose built turbo which had also incorporated a tricycle undercarriage, rear mounted airbrakes, and an ejection seat. The aircraft would go into production in 1947 and enter service with the IJAAS that same year. This plane would serve the IJAAS as a fighter well until it's replacement by the even better Ki-204 Karyu fighter in 1951, after that, the aircraft either continued in Japanese service as a fighter-bomber, photo-reconnaissance, and a even an advanced trainer version known as the Ki-163. A good number of the fighters would also be sold to many of Japan's client states and other nations such as Manchukuo, Mongolia Ethiopia, Peru, Argentina, and Afghanistan. A total of 1,624 fighters and 3,374 trainers would be manufactured between 1947 and 1955.
A Ki-204
Karyū of the 11th Sentai based outside of Petropavlovsk-Kamchatskiy, Far East People's Republic, circa 1953.
Nakajima Ki-204
Karyū (Fire Dragon) - WATO designation Kate
The Ki-204 would first have it's development origins in 1947 when the Imperial Army Headquarters put out a requirement for a new turbo fighter that was to implement design features such as swept wings, an onboard radar, among other features. The type would first take flight in 1949 and proved to be satisfactory and would enter service the in the autumn of 1951. The aircraft would prove to be a rather agile plane as well as great handling characteristics, which one aviation historian would dub the plane as the "Zero of the early Jet Age." A grand total of 10.461 airframes would be manufactured and would with both the IJAAS and it's successor, the Imperial Japanese Air Force after it's creation in 1954 along with a whole host of other nations. During the Frozen Conflict, the plane had proven to be a well designed fighter plane during the many proxy wars of that period.
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WATO, is an acronym for the Washington-American Treaty Organization, which is an analog for the NATO alliance my headcanon of TL-191.