In Japanese folklore, a kasa-obake is an umbrella-shaped yōkai said to emerge from an old umbrella.
The creature is usually depicted as a traditional Japanese paper umbrella with one eye, one leg, and sometimes a long tongue. It belongs to the broad idea that objects may acquire life or spirit after long use, although the best-known term for animated old objects is tsukumogami. Kasa-obake is also called karakasa-obake in many modern descriptions.
Its playful appearance became particularly popular in illustrated yōkai collections, toys, cartoons, and festival imagery. The exact design is not uniform: some versions have two arms, while others hop on a single leg. It should not be confused with the generic term yōkai, which applies to many supernatural beings and phenomena.