Ittan-momen

A bolt of white cotton — one tan, which is a real unit of cloth: about ten and a half metres long and thirty centimetres wide — flying through the dusk.

No eyes. No face. Nothing on it at all. Just fabric, moving on its own, at the hour the light goes.

It wraps around your face. Or your throat. And it holds.

It was a curfew

The ittan-momen belongs to one district — Kimotsuki, in Kagoshima, at the southern end of Kyushu — and almost nowhere else. It is genuinely local folklore, and what it was for is unmistakable once you see the domestic arrangement behind it.

Parents worked until dark. Children played until they were told not to. And what the parents said was: if you play too late, the ittan-momen will come.

There were specific local shrines identified as its ambush spots — places children had to pass on the way home — and the rule attached to those places is the detail that makes this entry.

It attacks the last child in the group.

So children ran through those spots. And more than that: nobody wanted to be last, which meant a group of children approaching a known ambush point would accelerate, together, without anyone having to organise it.

That is a superb piece of folk engineering. One rule, and it converts a scattered group of dawdling children into a fast-moving pack that gets home before full dark, with the incentive applied to each of them individually.

The cloth bleeds

There's exactly one combat account on record, and it's the best thing in the entry.

A man had it around his neck. He got a short sword to it and cut the cloth away.

And he was left with blood on his hands.

Folklore's one wounded textile. It doesn't tear like fabric — it bleeds like a body — and that single detail does more to establish what the thing actually is than any amount of description.

Then it got a personality

Here's the gap this entry is really about.

The original ittan-momen is an eyeless strip of cloth that suffocates children. Its written debut is not in a monster catalog at all — it enters the record through a dialect glossary, a collection of Ōsumi Kimotsuki regional words compiled with Yanagita's involvement. A vocabulary item.

Then Mizuki put it in GeGeGe no Kitarō and gave it eyes, arms, and a good-natured drawl. It became a character — loyal, funny, a bit of a southerner, one of the heroes.

In a 2007 tourism poll in Mizuki's own hometown, it was voted the most popular yokai in Japan.

Both of those are real and both deserve to be seen. Unlike the invented giant skeleton or the nurarihyon's fake promotion to supreme commander, nothing false happened here — the tradition is genuine, and what the twentieth century added was a personality, to a thing that previously had none.

An eyeless suffocating cloth and a beloved cartoon friend, from the same district, labelled as what each of them is.

Or it's a squirrel

The rational file, recorded rather than endorsed, is entertaining.

A television experiment put a 50-centimetre cloth in darkness and asked observers to judge its size. Average estimate: 2.19 metres. Maximum: six metres. Scale in the dark is simply not something human eyes do.

And the other proposal is the Japanese giant flying squirrel — a large animal that glides between trees on a stretched membrane, at dusk, silently, in exactly this region.

Which would be a very tidy outcome, because Japan has a second attack-textile in its folklore — a flying cloth that smothers people — that has also been proposed as a flying squirrel.

Two monsters, one musasabi, seen twice at the wrong distance.