There are three main types of kitsune possession: possession of an individual, possession of a family, and possession for use as a medium.
Kitsune have the appearence of foxes yet possess superior intellegence and supernatural capabilities. The more tails they have, the more knowledge and power they hold. The kitsune can have up to nine tails. After gaining the ninth the creature is said to turn gold or white and then possess infinite wisdom. In Shinto tales, the kitsune is a helpful messanger for the rice God Anari, and helps him recieve offerings from farmers. Yet Buddhist tradition paints the kitsune as a mean-spirited trickster figure. In these tales, the kitsune are known to take on human form, specifically that of beautiful women. They target unsuspecting men to seduce and take advantage of. Kitsune tsuki, is the act of being possessed by one of these beings. It was thought that they had the capability to take over the body and/or psyche of any human, and could only be removed by an exorcism.
Kitsune typically appear as foxes, with up to nine tails. However, this spirit is a shapeshifter and is known to take the form of humans, for various deceitful reasons.