Monster movie is a name commonly given to movies, which centre on the struggle between human beings and one or more monsters. While there is no specific academic genre classification of that name, the term is usually applied to films sometimes labelled as horror, fantasy or science fiction genre that involve fictional creatures, in most cases it is applied to films that feature more oversized monsters despite its history starting 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.