The Ki-9 was introduced to service as the Army Type 95-1 Medium Grade Trainer Model A under the former aircraft naming nomenclature system.
The first version had a complex split-axle landing gear with fairings over the top of the wheels.
In 1939 this was modified and simplified, the fuselage slightly shortened and total weight reduced.
The resulting Army Type 95-1 Model B or Ki-9-kai had improved manoeuvrability and flight characteristics.
This version was quickly superseded by the Army Type 95-1 Model C, or Ki-9-otsu in full production.
Both versions were used widely for blind-flying training with a folding hood over the rear cockpit, and several were modified with a glazed canopy over the rear cockpit for use as a staff officer transport plane.
(Army Type 95-1 Medium Grade Trainer Model A)
Initial version two-seat intermediate trainer aircraft.
(Army Type 95-1 Medium Grade Trainer Model B)
(Army Type 95-1 Medium Grade Trainer Model C)
Standard production version.
7.9 m (25 ft 11 in)
10.32 m (33 ft 10 in)
3.1 m (10 ft 2 in)
24.5 m2 (264 sq ft)
1,120 kg (2,469 lb)
Max take-off weight
1,580 kg (3,483 lb)
1 × Hitachi Ha13a (Army Type 95 350hp Air Cooled Radial) 7-cylinder air-cooled radial piston engine, 195 kW (261 hp) for take-off