The Imperial Japanese Army Air Force had an interest in the aircraft as part of its modernization program, and as a potential supplement to the Nakajima Ki-6. Two examples were acquired and tested, and the airframe was given the designation of Ki-7. One prototype used a Mitsubishi Type 92 nine-cylinder air-cooled radial engine and the other a Nakajima Kotobuki nine-cylinder air-cooled radial engine. The IJAAF did not order either version into production.
