Kawasaki Ki61 "Tony"

The Kawasaki Ki-61 Hien ("Tony") was used primarily by the Imperial Japanese Army Air Force (JAAF) from early 1943 to the end of WWII, with extensive deployment in the Southwest Pacific, particularly around New Guinea and Rabaul. It was heavily used for intercepting U.S. bombers, such as B-29s over Japan, and as a kamikaze plane. 
 
Key Locations and Theaters of Operation:
New Guinea & Rabaul (1943): The first operational units (68th and 78th Sentai) were based in Wewak and Rabaul, facing harsh jungle conditions.
Japan Home Defense: The 244th Sentai was famous for using the Ki-61 to intercept B-29 Superfortresses, with some specialized units created specifically for ramming attacks.
Philippines (1944–1945): Units like the 17th, 19th, 33rd, and 55th Sentai operated around Manila and Luzon to combat the American invasion.
China/Southeast Asia: Used in the Second Sino-Japanese War and various southern theaters. 
 
The aircraft, known for its liquid-cooled engine (a licensed German Daimler-Benz DB 601), was initially mistaken for a German or Italian design by Allied forces. Despite its technical challenges in tropical climates, it was one of the more effective Japanese fighters.