Hachishaku-sama (Ms. Eight Feet Tall) is a type of main Japanese spirit (Yokai) that takes the form of an impossibly tall female specter often rumored to have a deep, masculine or an attractive, feminine voice in which she repeats the interjection "Po" [ぽ] repeatedly, and has a habit of preying on young adults, usually those who are 18 to 29 years old.

She is a mysterious spirit who is rumored to have been imprisoned years ago but was eventually freed after one of the Jizo statues used to contain her suddenly cracked open by unknown means. Having escaped from her seal, Hachishakusama then went on to presumably target multiple people that she takes a liking to where they are then never seen again.