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A single-engine primary flight training aircraft, some 2,500 of which were built between 1935 and 1945, and used by the Imperial Japanese Army Air Force during World War II. A few Ki-9s were reportedly taken over in the immediate post-war era.
None available at present.
- World Air Forces Directory 2009/2010 (Ian Carroll)
To be added.
See other operators of the Tachikawa Ki-9 'Spruce'