What is a Gumiho? Guide to the Korean Nine-Tailed Fox
Gumiho is the Korean nine-tailed fox spirit - a shape-shifter, a seductress, and in traditional folk tradition, a devourer of human hearts and livers. She lives for a thousand years, gains her nine tails, and often takes the form of a beautiful woman to approach human men. She is the Korean counterpart to the Japanese kitsune and the Chinese huli jing, all descended from a shared East Asian folkloric tradition of nine-tailed foxes as powerful and dangerous spirits. In older Korean lore she is almost always malevolent. In modern Korean popular culture she has been reimagined as a more sympathetic, sometimes romantic figure - but the older tradition of the man-eating fox-woman still dominates in folk tellings.
Key Takeaways
- Gumiho (gumiho, 구미호) means “nine-tailed fox” in Korean. She is a shape-shifting fox spirit of Korean folklore.
- In the traditional tradition she is almost always malevolent, feeding on the livers or hearts of human men whom she seduces in the form of a beautiful woman.
- She is one of three related East Asian nine-tailed fox traditions: Korean gumiho, Japanese kitsune, and Chinese huli jing, all descended from ancient Chinese folkloric sources.
- She is said to gain her nine tails and full power after living for a thousand years, though the exact numerology varies by tale.
- In some traditions she can become fully human by not eating any human flesh for a period (usually 1,000 days), but the tales in which she succeeds are rare.
- She is depicted in traditional Korean art as a fox with multiple tails, or as a beautiful woman with subtle fox features (a bushy tail, fox ears, or a face that reveals its true form under specific conditions).
- Modern Korean popular culture (K-dramas, films, comics) has softened her portrayal, often reimagining her as a sympathetic or romantic figure. The older folk tradition of the malevolent gumiho persists alongside.
What is a gumiho?
A gumiho is a nine-tailed fox spirit in Korean folklore, most commonly malevolent, and most commonly a threat to human men whom she encounters. She takes the form of a beautiful woman to approach her prey.
Definition - gumiho
The nine-tailed fox spirit of Korean folklore. Gumiho is a shape-shifter who often takes the form of a beautiful woman to approach human men, whom she then feeds on. She is the Korean counterpart to the Japanese kitsune and the Chinese huli jing, all descended from shared East Asian folkloric traditions of powerful fox-spirits.
The name is Korean: gu means “nine,” mi means “tail,” ho means “fox.” Gumiho is literally “nine-tailed fox.” The word can refer either to the general category of nine-tailed foxes or to a specific individual fox-spirit encountered in a particular tale.
The three East Asian nine-tailed fox traditions - Korean gumiho, Japanese kitsune, and Chinese huli jing - all descend from a common source in ancient Chinese folklore. The Chinese Shan Hai Jing (Classic of Mountains and Seas), dating to the fourth century BCE or earlier, contains one of the oldest references to nine-tailed foxes. Each culture developed its own emphasis. The Chinese tradition is more varied (huli jing can be good or evil); the Japanese tradition is often benign (kitsune are sometimes messengers of the god Inari); the Korean gumiho tradition emphasises the dangerous, seductive, man-devouring aspect more strongly than the other two.
The origin of a gumiho
The traditional Korean account holds that a gumiho is a fox that has lived for a thousand years. During its long life it accumulates spiritual power. On reaching one thousand years, it gains its ninth tail and its full magical abilities, including the power to shape-shift into human form.
Some Korean tales specify that a fox becomes a gumiho by consuming the yeouiju, a fox-marble or fox-jewel that contains its magical power. Others say the transformation is a natural consequence of long life and gathered spiritual energy. The exact mechanism varies.
Once fully transformed, a gumiho can take on almost any form but most commonly appears as a beautiful young woman. Her fox nature can be detected by certain signs: a shadow that shows a fox rather than a human, a reflection in water that reveals her tail, or an inability to fully hide her features in the presence of a mirror or under bright moonlight.
What does a gumiho want?
The traditional gumiho wants human flesh - specifically, the liver or the heart of a human man. The exact organ varies by tale; older traditions often say liver, more modern versions often say heart.
Her method is seduction. She appears to a man - usually a traveller, a scholar, a young official - as a beautiful woman in need of help or shelter. He takes her in. She marries him or becomes his lover. At night, when he is asleep, she resumes her fox form and eats his liver. If discovered, she vanishes.
Many gumiho stories preserve the moment when the man discovers her true nature. Sometimes he sees her transforming in a mirror. Sometimes his hunting dog attacks her, revealing her form. Sometimes a wandering Buddhist monk or Confucian scholar recognises the signs. What happens next depends on the tale: the man may escape and expose her, may be killed, or may (in rare tales) be able to trap or defeat her.
The road to becoming human
Some Korean folk traditions preserve a possibility: a gumiho can become fully human if she refrains from eating any human flesh for a specific period, usually a thousand days.
In these tales, a gumiho meets a man she genuinely loves. She resolves to become human for his sake. She endures the thousand days of hunger. If she succeeds without breaking the fast even once, she becomes fully human and can live an ordinary life. If she fails - if she eats even one human, even accidentally - the count restarts, and she often loses hope.
The tales in which the gumiho succeeds are rare. Most end tragically: the fast is broken by an unavoidable circumstance, or the man discovers her nature and rejects her before she can complete the transformation, or she is forced to choose between her life and the man’s and cannot save both.
This variant of the gumiho tradition has been particularly influential in modern Korean media, which has focused on the tragic-romance possibilities more than on the traditional man-devouring horror. Read Gumiho, the nine-tailed fox.
The gumiho in modern Korean culture
Modern Korean film, television, and comics have extensively reimagined the gumiho. In these treatments she is often the protagonist, or a sympathetic love interest, or a struggling figure caught between her nature and her desire for humanity.
Notable Korean media featuring the gumiho include the film The Fox with Nine Tails (Gumiho, 1994), the television dramas My Girlfriend is a Gumiho (2010) and Tale of the Nine Tailed (2020), and many others. In these works the gumiho is typically a woman struggling with her heritage rather than a monster hunting men.
The older folk tradition of the malevolent gumiho has not disappeared. It survives in oral tradition, particularly in rural Korea, and in Korean horror fiction and film. But the sympathetic modern reimagining now dominates urban and international perceptions of the figure.
The gumiho compared to other nine-tailed foxes
Nine-tailed foxes appear across East Asian folklore. The three main traditions are related but distinct.
| Tradition | Fox spirit | Character | Notes |
|---|---|---|---|
| Korean | Gumiho | Usually malevolent; feeds on humans | Man-devourer emphasised |
| Chinese | Huli jing | Ambiguous; good or evil | Sometimes wise sages, sometimes seductive demons |
| Japanese | Kitsune | Often benign | Some are messengers of the god Inari |
| Vietnamese | Cửu vĩ hồ | Similar to Chinese huli jing | Often malevolent |
The three East Asian traditions all descend from a common Chinese folkloric source but developed distinct characters. The Korean gumiho is the darkest of the three; the Japanese kitsune is often the most positive. The Vietnamese tradition, closely tied to the Chinese, preserves both aspects.
Read the stories
Gumiho and related fox spirits appear in several Korean stories:
- Gumiho, the Nine-Tailed Fox
- Gwisin Ghost Stories
- The Heavenly Maiden and the Woodcutter
- The Snail Bride
- Dokkaebi and the Magic Club
- Yongwang the Dragon King
- Bulgasari, the Iron-Eating Creature
Gumiho is what Korean folk tradition kept as its representation of desire that eats what it loves. She approaches as a beautiful woman. She lives in the household as a wife or lover. She is discovered too late, most of the time. What the tradition preserves in her is not just a monster but a warning about the risks of trust extended to what is not what it appears - and, in the softer modern versions, a longing on the fox’s own part for the humanity she can never fully claim.
Frequently Asked Questions
What is a gumiho?
A gumiho is the nine-tailed fox spirit of Korean folklore. She is a shape-shifter, most commonly taking the form of a beautiful woman to approach human men, whom she traditionally feeds on. Her name in Korean means literally “nine-tailed fox” (gu = nine, mi = tail, ho = fox).
How does a fox become a gumiho?
The traditional Korean account is that a fox becomes a gumiho by living for one thousand years and accumulating spiritual power. On reaching one thousand years, it gains its ninth tail and its full magical abilities, including the power to shape-shift into human form. Some tales specify that a fox jewel or magical marble is involved in the transformation.
Why does a gumiho want human liver or heart?
The exact reason varies by tale, but the tradition treats it as a matter of the gumiho’s nature. She needs human vital organs to maintain her magical power or her human form. Some tales say she must consume a certain number of human livers to become fully or permanently human. The precise number varies.
Can a gumiho become fully human?
In some Korean folk traditions, yes - but only if she refrains from eating any human flesh for a period of one thousand days. If she succeeds, she becomes fully human. If she fails, even accidentally, the count restarts. The tales in which she succeeds are rare, and most gumiho stories that engage with this possibility end tragically.
How is a gumiho different from a Japanese kitsune?
Both are nine-tailed fox spirits in East Asian tradition, descended from a shared source in ancient Chinese folklore. But they have developed different characters. The Japanese kitsune is often benign - some are even messengers of the god Inari, worshipped at Shinto shrines. The Korean gumiho is more consistently malevolent in traditional tellings, focused on the seductive and man-devouring aspect. Both traditions have modern reimaginings that soften the older darker characters.
Is the gumiho real in Korean belief?
Not literally, in most contemporary Korean thought. She is a folkloric figure, though the tradition remains vivid enough that gumiho stories continue to be told and adapted. In older rural Korean tradition, gumiho was sometimes offered as an explanation for unexplained illness or death, particularly of men who had recently married women whose backgrounds were unknown. Contemporary Koreans treat the gumiho as a cultural and literary figure, not as a real supernatural threat.