The Nihon Hikoki Seiskusho K.K. was founded by navy Lieutenant Chikuhei Nakajima in 1917 and reorganized as the Nakajima Hikoki K.K. in 1919. Nakajima quickly became on of the two major aircraft manufacturers in Japan.
Early experience was gained by manufacturing foreign designs from Nieuport, Avro and Gloster some of which were flown into the 1930s. Aircraft of Japanese design were delivered to both the Imperial Japanese Army and Navy during World War II.

Nakajima also built Bristol Jupiter and Lorraine engines from 1927 through 1938 and used the Jupiter as a basis to developed it's own Ha-1 Kotobuki. Nakajima was second to Mitsubishi in the production of engines during World War II.

In 1952 permission was given for the resumption of aircraft manufacture in Japan. Fuji Jukogyo Kabushiki Kaisha (Fuji Heavy Industries) was formed in 1953 using the major assets of Nakajima.

Nakajima Sakae

The earliest use of the Nakajima Sakae (that I've been able to find) is on the Nakajima B5N2 "Kate" in 1939.
Sakae (Glory) was the Imperial Navy designation for this engine. The Imperial Army used the designations Ha-25, Ha-105 and Ha-115.

Over 30,000 units were built.


  • Sakae 12: 950 hp (708 kW)
  • Sakae 31: 1,130 hp (843 kW)


  • 14-cylinder, twin-row, air-cooled, radial piston engine
  • two speed supercharger
  • displacement: 1,696 cubic inches (27.8 litres)

used by

  • Mitsubishi A6M Zero (Zeke)
  • Nakajima B5N (Kate)