Nakajima Hikari

The Nakajima Hikari (Japanese: 光 "Light") was a nine-cylinder, air-cooled, radial aircraft engine developed in Japan for Navy use during World War II by the Nakajima Aircraft Company. It was a development of the Nakajima Kotobuki and Wright Cyclone. In Army use it was known as the Ha20.

Type Piston aircraft engine
Manufacturer Nakajima Aircraft Company
Major applications Aichi D1A
Developed from Nakajima Kotobuki


Hikari 1
820 hp (610 kW)
Hikari 1 kai
670–730 hp (500–540 kW)
Hikari 2
750–840 hp (560–630 kW)
Hikari 3
770 hp (570 kW)



General characteristics

  • Type: 9-cylinder air-cooled radial aircraft piston engine
  • Bore: 160 mm (6.3 in)
  • Stroke: 180 mm (7.1 in)
  • Displacement: 32.57 L (1,988 cu in)
  • Diameter: 1.375 mm


  • Cooling system: Air-cooled


  • Power output: 820 hp (610 kW)

See also

Related development

Nakajima Ha-8 (中島ハー8) Related lists


Nihon Koukuuki Jiten

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