Kaijū (怪獣, kaijū) is a Japanese word that literally translates to strange beast, and is used to refer to a genre of tokusatsu (special effects-based) entertainment. Kaiju films usually showcase monsters of any form, usually attacking a major Japanese city or engaging another (or multiple) monster(s) in battle.aiju 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.