[citation needed] After World War II, Japanese aircraft industry was banned from research as well as the destruction of materials and equipment related to aircraft.

[3] The T-1 was the first indigenously designed Japanese jet aircraft to be developed since World War II.

It was Japan's first mass-produced jet and the first aircraft to apply a swept wing.

[3] The development of a domestic jet engine was not completed in time, so the T-1A was powered by the British-designed Bristol Siddeley Orpheus turbojet[4] and made its first flight on May 17, 1960.

[3] With the entry into service of its successor, the Kawasaki T-4, flight training with the T-1 was completed in December 2000.