Kasa-obake (Japanese: 傘おばけ)[2][3] are a mythical ghost or yōkai in Japanese folklore. They are sometimes, but not always, considered a tsukumogami that old umbrellas turn into. They are also called "karakasa-obake" (から傘おばけ),[2][4] "kasa-bake" (傘化け),[5] and "karakasa kozō" (唐傘小僧).