Yama-chichi

Also Known As: 山地乳, also written 山地々; yamachichi, variant reading yamachiji; also called satorikai. The characters read literally as “mountain-ground-milk” and are almost certainly ateji, borrowed for sound rather than sense.
Region/Culture: East Asia
Mythos: Japanese Mythology
Primary Type/Nature: Monsters and Beasts
Mythical Attributes: It drains the sleeping breath from a human mouth, and the theft either kills the sleeper or lengthens their life depending on whether anyone sees it happen.
Role in Mythos: It is the final stage of an Edo-period transformation chain in which an aged bat becomes a nobusuma and the nobusuma, older still, becomes a yama-chichi that hides in the deep mountains.
Relation to Humans: It leaves the mountains at night to enter occupied houses and feed on people while they sleep, tapping the chest of the sleeper whose breath it has finished taking. If no one witnesses the act the sleeper dies the following day, and if someone does, the same sleeper gains years instead.

A farmhouse in the far north of Honshu, some time before the middle of the nineteenth century. The fire has gone down to a red seam under the ash. Someone is asleep on the matting with their mouth a little open, the way sleeping people are, and something has come in out of the cold and folded itself over them, close enough that its breath and theirs are the same air. Its lips are drawn forward into a soft point. It is drinking.

The yama-chichi looks like a monkey and is not one. The only picture anyone has of it, cut into a woodblock by Takehara Shunsensai in 1841, shows a small hunched animal with dark coarse fur, long thin fingers and a face pulled out into a snout, the mouth ending in the puckered lips that do all its work. Its size is a guess, because nothing states it. It fits into a room and over a body without disturbing either, and it moves quietly enough that in none of the telling does anybody hear it come in.

It was not born looking like that. A bat that lives long enough stops being a bat and becomes a nobusuma, the gliding thing that snuffs out lamps and smothers travellers on mountain roads. A nobusuma that lives longer still becomes a yama-chichi, and takes itself off into the deep mountains to hide. Edo natural history ran on this logic fairly often: age was a kind of pressure, and any animal left under it long enough came out the other side with intentions.

What it comes down for is breath. Not blood, not flesh, not the liver, which other creatures in the same tradition are perfectly happy to take. The yama-chichi puts its mouth over a sleeper’s mouth and pulls out the sleeping breath until there is none left, then taps the sleeper once on the chest and goes. The sleeper does not stir. In the morning they get up as usual, and the day after that they die.

Unless somebody watched. That is the hinge the whole thing turns on. If another person in the house happens to be lying awake and sees the shape bent over the sleeping figure, the creature bolts for the door, and the outcome reverses completely. The sleeper does not die. Their life is lengthened instead, and generously. One pair of open eyes in a dark room is the difference between a funeral and an old age.

The book that carries all this then quietly undercuts it. It admits that nobody has actually been known to die this way, and nobody has been known to gain years this way either. It follows that immediately by noting that there are districts where not a soul is unafraid of the yama-chichi. The gap between the record and the fear is the most honest line in the entry.

The record is thin in another direction too. The name occurs in exactly one place: *Ehon Hyaku Monogatari*, also known as *Tōsanjin Yawa*, a multicolour-printed collection of forty-four strange tales published in 1841, written by a late Edo popular author under the name Tōsanjin and illustrated by Shunsensai. No other book records it. No collected oral tradition records it. For a creature that supposedly emptied lungs across a whole province, it has no village, no shrine and nobody’s grandmother.

Even its home is unstable. The province name Ōshū, the old territory covering most of what is now Tōhoku, appears in the writing set inside the picture and nowhere in the main text, which never says where any of it happens. Later writers took different halves of that. Fujisawa Morihiko kept Ōshū. Mizuki Shigeru dropped the geography entirely and wrote only that there are places where the yama-chichi is dreadfully feared. Somewhere down the chain another strand of commentary relocated it to Tosa on Shikoku, several hundred miles in the wrong direction, and that version has been quietly copying itself ever since.

The name resists reading as well. Written 山地乳, the characters say something close to mountain-ground-milk, which describes nothing in the story and is almost certainly sound borrowed as script. The explanation offered is circular and slightly sheepish: it is called that because it hides away in the mountains. Deep in the ranges, the text adds, people call it satorikai, and that word drags it toward the Satori, the mind-reading ape of the central provinces, which it resembles closely enough on the page that the two have been confused since. A variant reading, yamachiji, pulls it the other way, toward the yamajijii of Shikoku. It is a creature with a great many neighbours and no address.

Its power is a narrow one and worse for being narrow. It does not fight, chase or overpower. It works on people at their least defended and takes the single thing a sleeping body cannot be persuaded to hold on to. The chest tap at the end is the part that stays with you. It serves no purpose in the killing, and it is never described as a blow, only as a touch, which makes it read less like violence than like a mark being left on finished work.

Its limits are just as narrow. It has to leave the mountains, it has to get inside an occupied house, and it can only take from the unconscious. Above all it cannot be watched. Being seen does not simply drive it off; being seen undoes what it has already done and returns the stolen years with interest. That is a strange design for a predator, and it points at what the yama-chichi most likely always was: not an animal anybody had met in the woods, but an account of a person who went to bed in good health and did not recover, and a reason to be grateful for whoever else in the house slept badly.

Frequently Asked Questions

What is a yama-chichi?

A yama-chichi is a Japanese yokai that steals the breath of sleeping humans. It appears in the 1841 Edo-period bestiary *Ehon Hyaku Monogatari*, where it is drawn as a small monkey-like animal with dark fur and puckered sucking lips, and it is said to hide in the deep mountains and visit houses at night.

Where does the yama-chichi come from?

The yama-chichi is the last stage of a transformation chain that begins with an ordinary bat. A bat that lives long enough becomes a nobusuma, the gliding yokai that puts out lamps and smothers travellers, and a nobusuma that lives longer still becomes a yama-chichi and retreats into the mountains.

Does the yama-chichi kill the people it feeds on?

It depends entirely on whether anyone sees it. If the yama-chichi drains a sleeper’s breath unobserved, it taps the sleeper on the chest and the person dies the following day. If someone else in the house witnesses the theft, the creature flees and the sleeper’s lifespan is greatly extended instead.

Is the yama-chichi from a real folk tradition?

The name yama-chichi is recorded in only one source, the 1841 *Ehon Hyaku Monogatari*, and has not been found in any other book or in collected oral tradition. The picture places it in Ōshū, the old province covering modern Tōhoku, but the main text names no location at all, and later writers have variously kept Ōshū, dropped the location, or wrongly moved the creature to Tosa on Shikoku.

Why is the yama-chichi confused with the Satori?

In the deep mountains the yama-chichi was reportedly called satorikai, a name that links it directly to the Satori, the mind-reading ape-like yokai of central Japan. The two look very similar in their illustrations, and the shared name has kept them entangled in later yokai literature.