Folklore, retold
The story as it is told
A retelling, not a citation. What follows is the story as the most widely circulated popular accounts tell it — folklore encyclopedias, translations, and the versions that have travelled furthest. It is synthesized rather than keyed line by line to the dated primary texts, and popular versions drift from what those texts actually say. The cited, source-by-source record begins further down this page, and where the two disagree, the record wins.
A woman's obi — the long sash wound around a kimono — left unwound in the room at night.
It rises, and it is a snake.
That's the jatai, and the honest thing to say about it is that the folklore barely had to invent anything. An obi already is a silk serpent. It's several metres long, it spends every day coiled tightly around a body, and at night it comes off and lies on the floor in loops.
All the tradition asked was what it does when nobody's watching.
The specification
The image is precise: a jealous woman's three-layered sash becoming a seven-coiled venomous serpent.
And the mechanism is a pun, signed and identical to the one behind the loom-serpent in this same tradition: jashin meaning "wicked heart" is pronounced exactly like jashin meaning "serpent body."
The wicked heart and the serpent body are the same sound. Becoming one is only a question of which characters you write.
One pun, two plates, and the props swapped: the loom-serpent leaves the house to hunt the absent husband, and the sash-serpent stays and coils at home.
The belief that came with it
Bundled with the picture is a piece of practical bedroom superstition, imported from China: an obi left by the pillow gives you dreams of snakes.
Sleeping near a belt induces serpent dreams. That's it — a small, testable, completely ordinary domestic claim, and it's the sort of thing that actually circulated.
Which reframes the jatai as something less like a monster and more like an explanation. The sash carries whatever the wearer carried. It is the object closest to the body all day, tightest against it, tied by her own hands — and what it holds, in this reading, is her attachment, which goes on operating after she's out of the room.
The pattern behind it
The jatai is the household-object echo of the biggest engine in Japanese folklore.
The master version is Kiyohime at Dōjōji: a woman spurned by a monk, pursuing him, transforming into a serpent as she crosses the river, and coiling around the temple bell he's hiding under until it glows red and he's dead inside it.
Woman becomes serpent through passion. It's the tradition's most durable transformation, and it repeats at every scale — a goddess, a court lady, a village woman, and finally a length of silk on a bedroom floor.
The Edo tale collections carry the folk floor of it too, and it's bleaker than the plate: a jealous woman who became a giant serpent and pursued the man who killed her until he took his own life.
The sash is the small, domestic, entirely deniable version of that. Nothing happens. Nobody dies. There's just a length of cloth in the corner of the room that has been around her all day, and is not where you left it.
Field guide
At a glance
- Behavior
- A woman's obi sash, left unwound in the night, rises as a snake — a jealous woman's three-layered sash becoming a seven-coiled venomous serpent.
- Powers
- Stored attachment: an obi is a silk snake coiled around a body all day; folklore only asks what it does unwatched.
- Weaknesses
- Wind it up before bed — and don't sleep with it by the pillow, which breeds dreams of snakes.
- Oddities
- The pun is signed: jashin, "wicked heart," equals jashin, "serpent body" — one homophone powering two Sekien plates.
- The household-object echo of the Dōjō-ji engine: woman into serpent via passion, here run through the wardrobe.
Overview
A woman's obi sash, left unwound in the night, rises as a snake. The jatai is Sekien's textile serpent [sekien-1781], and its logic is already in the material: an obi is a silk snake, coiled around a body all day — folklore only asks what it does when unwatched.
The lore
- The image, specified: "a jealous woman's three-layered sash becoming a seven-coiled venomous serpent" [ja-jatai].
- The pun is signed: jashin 邪心 (wicked heart) = jashin 蛇身 (serpent body) [ja-jatai] — the same homophone as hatahiro: one pun, two plates, textile props swapped (the loom-serpent hunts the absent husband; the sash-serpent coils at home).
- The standing belief bundled with the plate: an obi left by the pillow breeds dreams of snakes — a Chinese-derived belief (sleeping with a belt as a pillow induces snake dreams) [ja-jatai]; the sash as vessel of the wearer's attachment — jealousy especially — extending after her.
- The resonance field is the Dōjō-ji engine (the spurned woman who becomes a serpent and coils the temple bell around the man hiding inside — Sekien catalogs Dōjōji-no-kane in the same volume [sekien-1781]): woman → serpent via passion is the master pattern; the jatai is its household-object echo. The Edo tale-collections carry the folk floor: Shokoku Hyakumonogatari's jealous woman who became a giant serpent and pursued the man who killed her until he was driven to suicide [ja-jatai].
Two-track labeling
The image
Citations
The record
- [sekien-1781]per 02-HISTORICAL-CATALOGS.md.Edo, 1781 Sekien's third catalog (Konjaku Hyakki Shūi) — by now many plates are his own creations, presented deadpan beside folklore.All-source record
- [ja-jatai]「蛇帯」ja.wikipedia via WebFetch (retrieved 2026-07-26), Tier C. (JA summary assigns the plate to 1791 Hyakki Tsurezure Bukuro — volume assignment to verify against the 1781 listing.)modern reference Japanese Wikipedia's article on this subject, as retrieved in 2026 — often carries regional detail the English article lacks.All-source record
Where the evidence thins
Open questions
- Sekien caption verbatim.
- The obi/snake-dream belief's folk record (Nichibunken sweep).
- Dōjō-ji entry proper (the bell, Kiyohime — census carries Kiyohime).