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.
Variants: Hikari 3 - 770 hp (574 kW) Hikari 1 - 820 hp (611 kW)