The gumiho

If Korean folklore has a celebrity, it is the gumiho (구미호). The name means “nine-tailed fox”, written with the characters for nine (九), tail (尾) and fox (狐). It is a fox that has lived so long and gathered so much power that it can change its shape, and in Korean stories the shape it chooses is almost always a beautiful young woman. She may be charming, lonely or terrifying, sometimes all three at once, and for more than a century she has been the creature Korean storytellers reach for when they want a monster you can’t quite stop feeling sorry for.

This guide looks at where the nine-tailed fox comes from, what she does in the old Korean tales, how she differs from her cousins in China and Japan, and why she keeps coming back on Korean screens.

A fox with very old roots

The nine-tailed fox is older than Korea’s written stories about her. She first appears in ancient Chinese texts, most famously the Classic of Mountains and Seas (山海經), a book of strange lands and creatures compiled more than two thousand years ago, which describes a fox with nine tails living in a far-off country. In early China the creature could be a good omen as well as a danger. Over the centuries, though, the fox spirit across East Asia grew more and more associated with seduction, trickery and shapeshifting.

The basic idea behind all of these traditions is that animals can gain power with age. An ordinary fox that lives for a very long time, the stories say, grows wiser and stranger, gains extra tails, and eventually learns to take human form. Nine tails mark the peak of that power. Korea inherited the image of the many-tailed fox from this shared East Asian background, then told its own stories about her, and those stories have a flavour all their own.

The gumiho in the old Korean tales

Korean folklore is full of transformation tales, and scholars group the fox stories among the most important of them. Two in particular show what the traditional gumiho is like.

The first is the tale of the fox bead (여우구슬). It is told all over Korea, and the Encyclopedia of Korean Culture describes two main versions. In one, a schoolboy on his way to the village schoolhouse meets a lovely young woman and falls in love. She lets him hold her hand and sit with her, but she will never let him kiss her. Eventually he realises she must be a gumiho, and he insists. When she finally gives in, he finds a magic bead, a yeouiju, hidden in her mouth, and he takes it. In the darker version, the fox has set out to kiss a hundred schoolboys to death so that she can rise to heaven, and she has already reached ninety-nine when the last boy grows suspicious. Each night she passes the glowing bead from her mouth to his and back again, draining his strength, until his teacher guesses the truth and tells him to swallow it.

Either way, the boy now holds the fox’s power, and the story ends with a twist. Whoever swallows the bead, the tellers say, should look up at the sky first, so as to understand the ways of heaven. The boy, startled, looks down at the ground instead, and so he understands only the things of the earth. The story ends by explaining that this is why people know so much about the world around them and so little about heaven. Korean storytellers liked this ending so much that they attached it to famous real people, including the poet Yun Seon-do and the monk Doseon, as an explanation of where their unusual knowledge came from.

The second is the much scarier Fox Sister (여우누이). A couple with several sons longs for a daughter, and they pray so hard that, in some versions, they say they would take one even if she were a fox. A beautiful girl is born. As she grows up, the family’s animals begin to die one by one in the night. The youngest son keeps watch and sees his little sister slip into the cowshed and pull out a cow’s liver to eat. When he tells his father, he is called a liar and driven from home. Years later he returns, carrying three magic bottles given to him by his new wife, to find the house in ruins and his whole family gone. His sister greets him with sweet smiles and asks what he would like to eat. He escapes, she chases him, shifting between fox and girl as she runs, and he throws the bottles behind him one after another. The first becomes a river, the second a thicket of thorns, and the third a wall of fire that finally destroys her.

These two tales give the gumiho her classic traits: a beautiful human disguise, a hidden animal nature that leaks out at night, a magic bead that holds her power, and a hunger for something taken from living bodies. In many tellings it is the liver, which became one of the gumiho’s best-known features.

What does a gumiho want?

In the old stories the gumiho is usually a predator, and the danger is real. But even in the earliest tales she wants something more than a meal. The fox in the fox-bead story wants to rise to heaven. In later folklore and especially in modern retellings, the gumiho’s great longing is to become fully human, and the stories invent rules for how she might manage it: avoid killing for a hundred days, win the love of a human who keeps her secret, or, in the darker versions, eat a certain number of human livers. Those rules vary from story to story and owe a lot to modern film and television, so it is best to treat them as part of the creature’s living legend rather than one fixed tradition.

That longing is what makes the gumiho so interesting. She is not a demon who enjoys evil for its own sake. She is a wild thing trying to cross a line between animal and human, and the price of crossing is usually someone else’s life. Many Korean stories ask whether she can ever really belong, and the answer is rarely a happy one.

Gumiho, kitsune and huli jing

Korea, China and Japan all tell stories about fox spirits, and they are related, but they are not the same creature.

The Chinese huli jing (狐狸精) is the oldest of the three. She can be a seductive danger to men, a spirit to be placated, or in some traditions even a bringer of good fortune. The Japanese kitsune (狐) is the most varied. Kitsune can be wicked tricksters or loyal wives, and they are also the messengers of Inari, a widely worshipped god of rice and prosperity, so fox statues guard many Japanese shrines. The Korean gumiho is the most consistently dangerous of the three. Korean folklore has very few good gumiho, and she is almost never worshipped. Her stories are usually about a family or a community discovering the monster in its midst before it is too late.

The gumiho on screen

From the twentieth century onward, the gumiho moved from village storytelling into Korean popular culture, and she has never left. There were horror films about her in the 1960s and later, and in the late 1990s and 2000s she became a regular figure in television dramas. Over time she softened. Recent dramas such as My Girlfriend Is a Gumiho (2010) and Tale of the Nine Tailed (2020) turn her into a romantic lead, sometimes even making the gumiho a man, and focus on her loneliness and her wish to be human. These stories borrow freely from the old tales, especially the bead and the dream of becoming human, but they also add a great deal of their own.

That shift says something about the creature. The old gumiho was a warning: beauty can hide danger, and the stranger in your house may not be what she seems. The modern gumiho is often a mirror for anyone who feels like an outsider, trying to pass as something they are not. Both versions are true to her in their own way, and that double nature is probably why she remains Korea’s favourite monster.

Quick facts

The gumiho is a fox who, through great age, has grown nine tails and gained the power to take human form. In Korean tradition she usually appears as a beautiful woman, and her power is often held in a glowing bead. Her best-known stories are the Fox Bead tale and the Fox Sister, both recorded across Korea in the Compendium of Korean Oral Literature. She is related to the Chinese huli jing and the Japanese kitsune, but in Korea she is almost always dangerous and is not worshipped.

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