21st Fighter Training Squadron (JASDF)
| 21st Flight Training Squadron | |
|---|---|
| 第21飛行隊 | |
Mitsubishi F-2B of 21st Squadron (2010)  | |
| Active | March 31, 1975-present | 
| Country | Japan | 
| Allegiance | 4th Air Wing | 
| Branch | Japan Air Self-Defense Force | 
| Garrison/HQ | Matsushima Air Base | 
| Aircraft flown | |
| Trainer | = | 
The 21st Fighter Training Squadron (第21飛行隊, Dainiichi Hikōtai) is a squadron of the 4th Air Wing of Air Training Command of the Japan Air Self-Defense Force. It is based at Matsushima Air Base in Miyagi Prefecture, Japan.