Ikiryō

Ikiryō (生霊, lit. "living ghost"), also known as shōryō (しょうりょう), seirei (せいれい), or ikisudama (いきすだま), is a disembodied spirit or ghost in Japanese popular belief and fiction that leaves the body of a living person and subsequently haunts other people or places, sometimes across great distances. The term(s) are used in contrast to shiryō, which refers to the spirit of those who are already deceased.