In Japanese folklore, a kitsune is a fox-like yokai known for shape-shifting and, in famous stories, multiple tails.
Kitsune literally means “fox,” but folklore gives these animals intelligence, magical abilities, and extraordinarily long lives. A kitsune may transform into a human, often after reaching a great age; many tales use 100 years as the threshold, although traditions vary. Even in human form, the creature may reveal itself through a hidden tail, fox-like shadow, fur, or a reflection showing its true shape.
The number of tails indicates age and power. The most famous form is the nine-tailed kyūbi no kitsune, though stories also feature foxes with fewer tails. Kitsune may be benevolent guardians connected with Inari, the kami of rice, prosperity, and commerce, or mischievous and dangerous tricksters who bewitch travelers and lead them astray. These contrasting roles reflect the diversity of regional Japanese traditions.
Tanuki are the closest common mix-up: they are also shape-shifting yokai, but are associated with raccoon dogs rather than foxes. Tengu are birdlike mountain spirits, while kappa are amphibious water-dwelling creatures.