| Manufacturer | Mitsubishi |
| Model | Ki-21 |
| Modification | Ki-21-IIb |
| Country | Japan |
| Years | 1936 |
| Type | Bomber |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 22.50 m |
| Length | 16.00 m |
| Height | 4.85 m |
| Wing area | 69.60 m2 |
| Zero fuel weight | - |
| Empty weight | 6070 kg |
| Maximum takeoff weight | 10610 kg |
| Normal takeoff weight | 9710 kg |
| Flight duration | - |
| Engine | 2 Армейский тип 100 |
| Power | 2 x 1000 HP |
| Thrust | - |
| Maximum speed | 486 km/h |
| Cruising speed | 380 km/h |
| Rate of climb | - |
| Practical range | 2700 km |
| Service ceiling | 10000 m |
| Hovering ceiling | - |
| Crew | - |
