Aichi S1A

The Aichi S1A Denkō (電光; Bolt of Light) was a Japanese night fighter, intended to replace the Nakajima J1N1-S Gekkō. Like the Gekkō, it was to be equipped with radar to counter the B-29 air raids over Japan. Development time for the S1A increased while trying to overcome design shortcomings, such as the insufficient power of the Navy's requested Nakajima Homare engines, resulting in no aircraft being completed before the war ended.