Old Japanese farmhouses kept the toilet outside, in a slatted wooden shed apart from the main building, and after dark it was not somewhere to linger. Toriyama Sekien gave that dread a face in his 1779 print collection Konjaku Gazu Zoku Hyakki ("The Continued Illustrated One Hundred Demons of the Past and Present"): a bald, tonsured monk at the privy, spitting a bird from his mouth.
What does it look like?
Sekien draws Ganbari-nyūdō as a nyūdō — a term for a lay Buddhist who has shaved his head and taken partial vows, a stock figure in yokai art for something monk-shaped but wrong. The face is human and the head is bald. A small bird flies out of his mouth. He does not attack or grab. Later local tales say he peers in through the privy window.
The one night he comes
Ganbari-nyūdō's whole legend hangs on a single date: Ōmisoka, New Year's Eve. Sekien's note says it plainly. Go to the privy on that night and say "Ganbari nyūdō, hototogisu." Then you will not see any monster. He calls this something everyone already knows.
Local versions twist the luck the other way. Matsura Seizan's essay collection Kasshi Yawa records one. Call his name and look down, and a monk's head appears. Put it in your left sleeve, and it turns into a gold coin.
A pun a thousand years wide
Sekien's own note brings in a Chinese toilet deity he calls Kakutō (郭登). This spirit was said to hand out fortune or misfortune. The joke is buried in the kanji: the characters for Kakutō's name are close cousins of the characters for kakkō — the Japanese word for the cuckoo, or hototogisu. The spell writes "hototogisu" as 郭公, and Sekien notes that 郭登 and 郭公 must be the same story. The chant itself was common folk knowledge. The link to the Chinese god is Sekien's scholarly guess, very much his style.
Not every region used his name. In Wakayama, the same figure was called Setchin-bō ("privy priest"), said to announce himself with a bird-like cry rather than a human voice — the same idea, told with a different mouth.
Not the only thing in the privy
Sekien drew other watchers of the house's dirty corners. Akaname licks the grime in neglected bathhouses. Shōkera peers down through a roof skylight, a figure tied to the Kōshin vigil, when hidden worms report a person's sins to heaven. A private moment in an Edo-period house was, by folk reckoning, rarely as private as it felt.
Where it comes from
The mundane explanation sits right under the supernatural one. A rural privy was a separate, unheated structure, often reached by a dark path, with a floor built over an open pit — a genuinely hazardous place to visit alone at night, never mind demons. Turning that walk into a story with a monster in it gave the danger a shape, and gave children and travelers a reason to be careful, or at least to bring a lantern.
The New Year's timing fits a broader pattern in Japanese folk religion, where Ōmisoka is treated as a threshold — a night when the boundary between the old year's grime and the new year's luck is thin, and household spirits of all kinds are settled, honored, or warned off before the count turns over. A privy-haunting monk who can be dismissed with the right words at the right hour belongs to that same housekeeping impulse: close out the year clean, everywhere in the house, including the outhouse.
See the original print
Toriyama Sekien drew Ganbari-nyudo in Konjaku Gazu Zoku Hyakki (1779). This book has that picture, with its caption in English.
- Japandemonium Illustrated: The Yokai Encyclopedias of Toriyama Sekien →trans. Hiroko Yoda & Matt AltThe complete Edo-period bestiaries that so many of these entries trace back to, in full English translation.
- The Book of Yokai →Michael Dylan FosterThe most readable scholarly introduction to yokai — where they come from, what they mean, and the major creatures.
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The toilet ghost, still with us
Japan never really let go of the haunted bathroom. Walk into almost any elementary school today and you'll hear some version of Hanako-san, the schoolgirl spirit said to answer if you knock three times on a particular stall door — a story told by children, about a bathroom, with its own protective ritual for surviving the encounter. The shed has become a tiled stall and the lay-monk has become a schoolgirl, but the shape of the story — a watcher in the one room where you're briefly alone, and a phrase that keeps it at bay — is the same one Sekien drew in 1779.
