Bakemono

and (sometimes obakemono) are a class of monster or spirit in Japanese folklore. Literally, the terms mean a thing that changes, referring to a state of transformation or shapeshifting. These words are often translated as ghost, but primarily they refer to living things or supernatural beings who have taken on a temporary transformation, and these bakemono are distinct from the spirits of the dead. However, as a secondary usage, the term obake can be a synonym for yūrei, the ghost of a deceased human being.
See more at Wikipedia.org...

[Japanese] Spirits possessed of evil powers. The term covers various spirits such as kappa, mono-no-ke (evil spirits), oni, ten-gu, and yamanba or yama-ubu (a mountain witch).