In Japanese folk belief, yurei are faintly visible figures who have remained in Utsushiyo (the land of the living) even after their soul left their body after death, in order to resolve some form of lingering attachment or to seek revenge for a wrong.
幽霊（ゆうれい）は、日本の民間信仰の中で、人が死亡して、肉体から魂が離れた後も、未練や遺恨を解くために、現世（うつしよ）に残り、生前の姿で幽か（かすか）に可視化したもの。