Kamikiri

You walk home at night. Nothing happens. Nobody touches you.

And later, indoors, your hair — bound up, as everyone's was — falls off in one piece, cut clean through at the base of the knot, and lies on the floor.

That's the kamikiri, and it's the yokai of an event with no witness.

It's in the newspapers

Most creatures in this collection are attested by stories. The kamikiri is attested by incidents, and they have dates.

Hair-cutting panics recur in Japan from the 1600s onward, and they carry right through into the era of the printing press. Which produces something you almost never get: a yokai whose sightings ended up in journalism.

The best-documented is Tokyo, 1874. A servant named Gin felt what she described as a chilly presence. Her bound hair fell, severed. She fainted.

And the newspapers ran it — and the fear spread the way newspaper fear spreads, and more cases followed.

That is a yokai crossing over from ghost story into news reporting, in real time, in the Meiji period. The next time Japan does this at scale is the slit-mouthed woman in 1979, and by then the mechanism is identical: a claim, a press, a panic curve.

Nobody ever saw it, so the body kept changing

Because there's no witness — that's the whole premise — the creature has no settled form, and you can watch illustrators guess.

The great scroll of 1737 paints it birdlike: a long beak, and hands that are scissors.

A print from 1868 makes it black and cat-like.

Neither is more correct than the other. There was never anything to draw. The kamikiri is a shape-shaped hole where a cause should be, and each artist filled it with whatever felt right that decade.

What was actually happening

The explanations on record are worth having in full, because they're a good cross section of how this material works.

Foxes, collecting human hair for their transformations. The standard supernatural answer.

People. Actual human hair-cutters — and the record supports this one. There's a 1931 arrest of a young man who had been cutting women's hair and who claimed it improved his health. That is a real crime with real perpetrators, and it has happened in many countries.

Mass anxiety, amplified by print. Once the story is circulating, hair that comes loose, or breaks, or was cut by someone in the household, gets read through the story.

And Mizuki's gloss, which is modern and should be labelled as such: that the kamikiri cuts your hair to warn you off a marriage — specifically that you are about to marry a yokai in disguise, and the severed hair is an intervention on your behalf.

That last one is charming and entirely twentieth-century.

Why hair

One thing worth understanding, because it explains why this landed so hard.

In Edo Japan, a woman's bound hair was not a hairstyle. It was status, identity, and enormous daily labour — elaborate, oiled, maintained, and often dressed by someone else. It signalled marital status and class at a glance.

Cutting hair off was also a real punishment and a real shaming.

So a person who lost their hair overnight, to nothing, hadn't just been vandalized. They had been publicly altered — visibly, irreversibly, for months — by something nobody saw.

That's why it made the papers.