Spirit away
The expression to "spirit away" means to remove without anyone's noticing.
Kamikakushi (神隠し, lit. "hidden by gods") means "spirited away". Kamikakushi, in Japanese folklore, is used to refer to the mysterious disappearance of a person that happens when an angered god takes a person away. The word Onikakushi, "hidden by demons", is used for the same purpose, just that instead of an angered god, it's a demon who takes the person away.
Japanese
In the anime film Spirited Away (千と千尋の神隠し, Sen to Chihiro no Kamikakushi, Sen and Chihiro's Spiriting Away), the main protagonist, Chihiro, is "spirited away" from reality to the spirit world.
In the anime, manga and Visual Novel Higurashi no Naku Koro ni, when people disappear, they blame the curse of Hinamizawa's guardian god/demon Oyashiro-sama, who takes people away every year, and then people talks about "Onikakushi", which is the name for the first arc of the Manga, Anime and Visual Novel.