This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Kasa-obake (Japanese)
Kasa-obake are mythical and are sometimes, but not always, considered a tsukumogami that old umbrellas turn into. They are also called "karakasa-obake","kasa-bake", and "karakasa koz?". They are generally umbrellas with one eye and jump around with one leg, but sometimes they have two arms or two eyes among other features, and they also sometimes are depicted to have a long tongue.
Sometimes, but rarely, they even have two feet, as depicted in the y?kai emaki such the "Hyakki Yagyo Zumaki". In the Hyakki Yagyo Emaki from the Muromachi period, y?kai that appeared as umbrellas could be seen, but in this emaki, it was a humanoid y?kai that merely had an umbrella on its head and thus had a different appearance than that resembling a kasa-obake.