The was a Japanese jet fighter aircraft-attack aircraft project designed during the final stages of World War II but which was never completed.
The Nakajima Kikka had been inspired by the successful German Messerschmitt Me 262, but the similarities to that aircraft were limited to the general configuration. On the other hand, the design team led by Iwao Shibuya based the Karyū far more closely on the German aircraft, which had already proven itself quite formidable.
The Ki-201 project was ordered by the Imperial Japanese Army between October and December 1944, with the Army laying out a performance requirement of an 800km/h1000km/h top speed, 12000m (39,000feet) practical ceiling, and 800km-1000kmkm (500miles-1,000mileskm) range. The design was advanced by Nakajima during 1945 and the basic drawings were completed in June.[1]
Nakajima anticipated the completion of the first Karyū by December 1945, and the first 18 units by March 1946. Most sources agree that work on the first prototype had not yet begun by the time of the Japanese surrender.