Monster movie (creature feature or giant monster film) is a movie that centres on the struggle between people and one or more monsters. The film may also belong to the horror, fantasy or science fiction genre. In most cases it is applied to films that feature more oversized monsters. Monster movies originated with adaptations of horror folklore and literature. In Japanese cinema, such monsters are referred to as Kaiju. Typically, movie monsters differ from more traditional antagonists in that many exist due to circumstances beyond their control; their actions not entirely based on choice, potentially making them objects of empathy to film viewers.