Mononoke
Mononoke are vengeful spirits (onryō), dead spirits (shiryō), live spirits (ikiryō), or spirits in Japanese classical literature and folk religion that were said to do things like possess individuals and make them suffer, cause disease, or even cause death.
Source: Wikipedia, Mononoke. Text licensed CC BY-SA 4.0. Not endorsed by or affiliated with Wikipedia or the Wikimedia Foundation.