The Fuji T-3 is a primary military trainer aircraft used by the Japan Air Self Defense Force, manufactured by Fuji Heavy Industries.

The KM-2B was a further development of the Fuji KM-2 (itself a four-seat development of the T-34 Mentor with a more powerful engine) for use as a primary trainer for the Japan Air Self-Defense Force (JASDF).

It combined the structure and engine of the KM-2 with the tandem cockpit of the T-34 Mentor.

[1] Fifty were purchased by the JASDF as the Fuji T-3, and production continued until 1982.

The T-3 was retired in 2007 and replaced by the Fuji T-7, a turboprop variant of the T-3, with a 400 shp (300 kW) Allison 250 engine.