Most yokai are things you meet. Shibito-tsuki is something that meets a body someone else already stopped using. The name is blunt: 死 (shi, "death") + 人 (bito, "person") + 憑 (tsuki, "possession"). It means a dead person, possessed. The case that put the name on the map comes from Inaba Province, in what is now Tottori Prefecture, and it does not read like a ghost story. It reads like a report.
What does it look like?
That is the wrong question, and the wrong question is the point. Shibito-tsuki has no fixed face, no drawn form in an old picture scroll, because it wears someone else's. At first it looks exactly like the person who just died. That is what makes it worse. The wrongness only shows later, in what the body does and, eventually, in what happens to it in the heat.
The night in Iwai District
A farmer in Iwai District, Inaba Province, died after a long illness. His family waited at home for a Buddhist priest to come. Before he arrived, the corpse suddenly stood up.
It stood with a strength no sick, dead man should have had. Several grown men tried to hold it down and could not; it dragged them across the room. It ate. It drank. It did not sleep, for days running, while the household tried everything it knew. It was summer, and the body was still a corpse under whatever had taken hold of it. The heat did its usual work regardless. The accounts describe fluid running from the eyes and mouth, and a smell no one could stand.
The family turned to prayer and rites against possession. Nothing worked. In the end they gave up trying to drive the thing out. They shut it inside the house and moved elsewhere.
Alone, it shouted for food and drink and tore through the house. The next day it fell down and stopped moving. The family decided the possessing thing had left. They held the funeral in a hurry.
Not a ghost, and not the person
Japanese folklore is careful about which kind of dead thing it is dealing with. A yūrei is the person's own spirit, unable to leave. An ikiryō is a living person's grudge, wandering loose from a body that is still breathing. Shibito-tsuki is neither. The man in Iwai District was already gone. What answered instead of him was a tsukimono (a possessing thing, from the same 憑 that gives the yokai its name). It found an empty house and moved in. The eating and the strength and the refusal to sleep are not human habits pushed to an extreme. They read as something inhuman trying to run a body it does not know how to operate.
Where it comes from
A wake exists to keep watch over a body until it can be properly buried, with someone present the whole time. Shibito-tsuki voices the fear behind that custom: before the rites are done, something else can get in first. It sits in the same broad folk category as kitsune-tsuki, fox possession, and other tsukimono beliefs, but turned toward the one moment those beliefs rarely dwell on: the gap between death and burial, when a body is still there and still, technically, unclaimed.
The earliest record we found is an Edo-period collection of night tales, the Sessō Yawa-shō, by Ueno Tadachika. It was printed in 1915 in a series of local Tottori texts. The local historian Ogihara Naomasa later retold the case in his 1951 Inpaku Densetsu-shū, "Legends of Inaba and Hōki."
Shibito-tsuki today
Shibito-tsuki wears whatever body it takes, so it never picked up a standard look. That is probably why it stayed a regional footnote rather than a household name. It owes its modern visibility mostly to one source: Mizuki Shigeru, the manga artist famous for his yokai comics. He included the Iwai District account in his 1994 yokai encyclopedia. That put an obscure piece of Tottori folklore in front of a national audience. No drawing from the original telling survives to compare it to. What is left is the report itself: a family that tried everything the customs offered, and finally just walked out of their own house.
