Related terms include
kaijū
eiga (怪獣映画 kaijū eiga?, monster movie), a film featuring giant monsters or a single monster; kaijin (怪人?, referring to roughly humanoid monsters); and daikaiju (大怪獣 daikaijū?, giant
kaiju), specifically meaning the larger variety of monsters.
Kaiju are typically modeled after conventional animals, insects or mythological creatures such as vampires, werewolves, mummies and zombies, fall into this category.
Frankenstein's monster Kaiju are sometimes depicted as cannon fodder serving a greater evil. Some kaiju are elite warriors which serve as the right-hand man to the greater villain and are destroyed by the heroic forces. Others have a neutral alignment, only seeking to destroy buildings and other structures. During the early eras of
tokusatsu, "heroic" monsters were rarely seen in daikaiju eiga films, and it was not until later when television tokusatsu productions began using kaiju which aided the hero, saved civilians, or demonstrated some kind of complex personality. These kaiju adopted many classic monster traits, appearing as the "Misunderstood Creature". Some kaiju hung out with the heroes and provided comedy relief, in contrast to the darker approach to these characters