Kitsune is the Japanese word for fox. Foxes are a common subject of Japanese folklore; in English, kitsune refers to them in this context. Stories depict them as intelligent beings and as possessing magical abilities that increase with their age and wisdom. According to Yōkai folklore, all foxes have the ability to shape shift into men or women. While some folktales speak of kitsune employing this ability to trick others—as foxes in folklore often do—other stories portray them as faithful guardians, friends, lovers, and wives.
Foxes and human beings lived close together in ancient Japan; this companionship gave rise to legends about the creatures. Kitsune have become closely associated with Inari, a Shinto kami or spirit, and serve as its messengers. This role has reinforced the fox's supernatural significance. The more tails a kitsune has—they may have as many as nine—the older, wiser, and more powerful it is. Because of their potential power and influence, some people make offerings to them as to a deity.
Japanese fox myths had its origins in Chinese mythology. Chinese folk tales tell of fox spirits called húli jīng that may have up to nine tails (Kyūbi no Kitsune in Japanese). Many of the earliest surviving stories are recorded in the Konjaku Monogatarishū, an 11th-century collection of Chinese, Indian, and Japanese narratives. The nine-tailed foxes came to be adapted as a motif from Chinese mythology to Japanese mythology.
Smyers (1999) notes that the idea of the fox as seductress and the connection of the fox myths to Buddhism were introduced into Japanese folklore through similar Chinese stories, but she maintains that some fox stories contain elements unique to Japan.
Kitsune are believed to possess superior intelligence, long life, and magical powers. They are a type of yōkai, or spiritual entity, and the word kitsune is often translated as fox spirit. However, this does not mean that kitsune are ghosts, nor that they are fundamentally different from regular foxes. Because the word spirit is used to reflect a state of knowledge or enlightenment, all long-lived foxes gain supernatural abilities.
There are two common classifications of kitsune. The zenko (善狐?, literally good foxes) are benevolent, celestial foxes associated withInari; they are sometimes simply called Inari foxes. On the other hand, the yako (野狐?, literally field foxes, also called nogitsune) tend to be mischievous or even malicious. Local traditions add further types.For example, a ninko is an invisible fox spirit that human beings can only perceive when it possesses them.
Physically, kitsune are noted for having as many as nine tails. Generally, a greater number of tails indicates an older and more powerful fox; in fact, some folktales say that a fox will only grow additional tails after it has lived 100 years. One, five, seven, and nine tails are the most common numbers in folk stories. When a kitsune gains its ninth tail, its fur becomes white or gold. These kyūbi no kitsune (九尾の狐?, nine-tailed foxes) gain the abilities to see and hear anything happening anywhere in the world. Other tales credit them with infinite wisdom (omniscience).
A kitsune may take on human form, an ability learned when it reaches a certain age—usually 100 years, although some tales say 50. As a common prerequisite for the transformation, the fox must place reeds, a broad leaf, or a skull over its head. Common forms assumed by kitsune include beautiful women, young girls, or elderly men. These shapes are not limited by the fox's age or gender, and a kitsune can duplicate the appearance of a specific person. Foxes are particularly renowned for impersonating beautiful women. Common belief in medieval Japan was that any woman encountered alone, especially at dusk or night, could be a fox. Kitsune-gao or fox-faced refers to human females who have a narrow face with close-set eyes, thin eyebrows, and high cheekbones. Traditionally, this facial structure is considered attractive, and some tales ascribe it to foxes in human form. Variants on the theme have the kitsune retain other foxlike traits, such as a coating of fine hair, a fox-shaped shadow, or a reflection that shows its true form.
In some stories, kitsune have difficulty hiding their tails when they take human form; looking for the tail, perhaps when the fox gets drunk or careless, is a common method of discerning the creature's true nature. A particularly devout individual may in some cases even be able to see through a fox's disguise merely by perceiving them. Kitsune may also be exposed while in human form by their fear and hatred of dogs, and some become so rattled by their presence that they revert to the form of a fox and flee.
One folk story illustrating these imperfections in the kitsune's human shape concerns Koan, a historical person credited with wisdom and magical powers of divination. According to the story, he was staying at the home of one of his devotees when he scalded his foot entering a bath because the water had been drawn too hot. Then, "in his pain, he ran out of the bathroom naked. When the people of the household saw him, they were astonished to see that Koan had fur covering much of his body, along with a fox's tail. Then Koan transformed in front of them, becoming an elderly fox and running away."
Other supernatural abilities commonly attributed to the kitsune include possession, mouths or tails that generate fire or lightning (known as kitsunebi), willful manifestation in the dreams of others, flight, invisibility, and the creation of illusions so elaborate as to be almost indistinguishable from reality. Some tales speak of kitsune with even greater powers, able to bend time and space, drive people mad, or take fantastic shapes such as a tree of incredible height or a second moon in the sky. Other kitsune have characteristics reminiscent of vampires or succubi and feed on the life or spirit of human beings, generally through sexual contact.