Moonlight Mask (translated from
Gekko Kamen) was Japan's first
tokusatsu Spy Fiction Cop Show series from 1958
note Supergiant (redubbed as Starman) is actually the first toku show. Though Moonlight Mask has the first masked toku hero.. It was very popular with kids, but was cancelled due to a kid dying trying to imitate the titular character's stunts. It was later adapted into an anime in the 70s and again in the 90s.
Definitely
not to be confused with
Kekko Kamen (although the latter was named in parody of the former).
This series provides examples of: