The Mitsubishi Kinsei (金星, Venus) was a 14-cylinder, air-cooled, twin-row radial aircraft engine developed by Mitsubishi Heavy Industries in Japan in 1934 for the Imperial Japanese Navy.
The Mitsubishi model designation for this engine was A8 while it was an experimental project; in service, it was known as the MK8 "Kinsei" by the Navy.
These changes resulted in a significant performance uplift, compared to previous variants.
Indirect fuel injection was fitted as well as a larger two-speed supercharger.
Kinsei 60 series was introduction of direct injection and later, a turbo-supercharger.