Yokai

Yokai is a name shared by many forms of mythical creatures from Japan. The term Yokai refers to pretty much any unknown creature or being. The study of Yokai is called Yokaigaku. Yokai take various forms and are morally ambiguous. Some may have deceptive features, being attractive and dangerous, or ugly and friendly. Many have both human and animal features and various kinds of powers, frequently shapeshifting. Some have no physical form at all and are only noted by sounds or feelings. There are some specific forms of Yokai called Tsukumogami created when objects reach a great age. 

Citations:

Bane, Theresa. Encyclopedia of Spirits and Ghosts in World Mythology. United States, McFarland, Incorporated, Publishers, 2016.