A relatively broad term in Japanese encompassing any fictional human-like character that possesses supernatural abilities (literally meaning "mysterious person"), usually used to refer to villains. Related to [[kaiju]], insofar as possessing monstrous traits or abilities, albeit usually human-sized and humanoid in appearance. Examples in Japan include the titular characters from Toho's Transforming Human Series films ([[slime boy|The H-Man]], The Secret of the Telegian and The Human Vapor), [[Godman]], and many characters in the [[Kamen Rider]] franchise (including some of the Riders themselves), while Western examples include [[Frankenstein's Monster]].

On Danbooru, per the broad definition, kaijin can be depicted in various fashions: [[monster boy]]/[[monster girl]], [[cyborg]], [[alien]], etc. Use the appropriate tag for the specific kaijin.
kaijin