Tsuru Nyōbō

A man frees a crane from a snare.

That night a woman comes to his door and stays.

And she asks one thing: while she weaves — seven days, behind closed doors — do not look in.

The cloth

What she brings out is unearthly. Nobody has seen weaving like it.

It sells, for a great deal. And the household — which was poor — lives on it.

So she weaves again. And again.

And she grows thinner.

He looks

A crane at the loom.

Plucking her own feathers to weave into the brocade.

The wealth was always her body.

Seen, she must go. And she does.

There's no vengeance in it

That's what makes this the gentlest telling in the whole supernatural-spouse family.

She doesn't curse him. She doesn't kill him, or take the money, or come back in winter as an icicle. There's no rite that would have fixed it and no priest to call.

She simply cannot stay once she has been seen, and she goes.

It's an economy laid bare, and a marriage ended by knowledge.

And the peek is also an audit

Here's the reading that I think has aged strangely well.

He didn't look out of malice, or even really out of curiosity about her.

He looked because the household was living on something and he didn't know how it was made.

That's the situation of a man watching goods of impossible quality come out of a closed room at a rate no human hand could manage, and wondering.

And what he finds when he opens the door is that the price was being paid by somebody, out of their own body, and that he had been eating it.

Every retelling of the crane wife is about the cost of knowing where the goods come from — which is a folktale that has quietly aged into a parable about supply chains.

The family is enormous

Seki Keigo's tale-index files this as one of the best-known Japanese supernatural-spouse tales, and the family is a whole aviary and then some.

Pheasant wives. Bird wives. Fox wives. Clam wives. Fish wives. Snake wives.

The fox wife of the Nihon Ryōiki — 822 — is the earliest documented member: the woman who bears a child, is startled by a dog, reverts, and flees, and whom the husband calls back with come and sleep with me, which is where the word kitsune is said to come from.

The crane is not the oldest. She's the beloved one, and she's beloved because she's the one where nobody does anything wrong.

And the verdict is the tradition's oldest

It runs all the way back to the birth hut on the beach, where a sea-princess asked her husband not to watch and he watched.

The otherworld will feed you, clothe you, and love you — until you insist on seeing how.

Two versions of the tale exist, incidentally, and they're worth distinguishing.

*Tsuru no Ongaeshi — "the crane's return of a favour" — where she sometimes comes as a daughter* rather than a wife.

And *Tsuru Nyōbō* — the marriage version.

The daughter version hurts differently. Same loom, same feathers, same closed door. But when he opens it, what he has been living on is his child.