The Metal Hero Series is a genre of tokusatsu superhero TV series produced by Toei for Japanese television. The protagonists of the Metal Hero Series are mainly space and police-based characters who are typically androids, cyborgs, or humans that don "metallic" suits. Henceforth, most of the Metal Heroes are also referenced as "Henshin (transforming) Heroes." Usually, the genre revolves around a technological theme where technology, in the right hands, can be used for the greater good.