Mitsubishi Ki-21

The Mitsubishi Ki-21 (Allied codename: Sally) was a Japanese bomber during World War II. It began operations during the Second Sino-Japanese War participating in the Nomonhan Incident, and in the first stages of the Pacific War, including the Malayan, Burmese, Dutch East Indies and New Guinea Campaigns. It was also used to attack targets as far-flung as western China, India and northern Australia. Variants of the Ki-21 medium bomber remained in production until 1944 and were in service until the end of the Second World War. 

The Ki-21 had more then one Allied codename. Initially called Jane, the name was changed to Sally. When the Ki-21-IIb variant entered service, Allied observers to mistakenly believed it for a completely new type, which was designated Gwen. When it was realized that Gwen was a new version of the Ki-21, it was renamed Sally 3, with Sally 1 referring to the earlier Ha-5 powered models, and Sally 2 referring to the Ha-101 powered Ki-21-IIa.

Mitsubishi Ki-21
Class Aircraft
Type Bomber
Manufacturer Mitsubishi Aircraft Corporation
Origin Japan
Country Name Origin Year
Japan 1936
Country Name Operational Year Retirement Year
Japan 1938 1945 View
ManufacturerName Production From Production To Quantity
Mitsubishi Aircraft Corporation 2064 View

Role Medium bomber
Manufacturer Mitsubishi
First flight 18 December 1936
Introduction 1938
Primary users Japan
Number built 2,064 units (excluding Ki-57)
Variants Mitsubishi Ki-57

General characteristics

  • Crew: 5-7
  • Length: 16.0 m (52 ft 6 in)
  • Wingspan: 22.50 m (73 ft 10 in)
  • Height: 4.85 m (15 ft 11 in)
  • Wing area: 69.90 m (752.12 ft)
  • Empty weight: 6,070 kg (13,354 lb)
  • Loaded weight: 10,600 kg (23,320 lb)
  • Powerplant: 2 x three-blade metal variable-pitch propellers Mitsubishi Type 100 Ha-101 14 cylinder radial, 1,119 kW (1,500 hp) each


  • Maximum speed: 485 km/h (301 mph) at 4,700 m (15,400 ft)
  • Cruise speed: 380 km/h (236 mph)
  • Range: 2,700 km (1,680 miles)
  • Service ceiling 10,000 m (32,800 ft)
  • Rate of climb: 13 min 13 sec to 6,000 m (19,680 ft)


  • 5 x 7.7 mm flexible Type 89 machine guns in nose, tail, beam and tail positions
  • 1 x 12.7 mm Type 1 Heavy Machine Gun in dorsal turret
  • 1000kg (2200lb) of bombs

End notes