In fact, it's so powerful that it is regarded as a 'natural disaster' by the villagers and is often believed to be a force that comes when human beings become too evil One swipe of its mighty tails can cause whole villages to crumble and tidal waves to form. Indeed, in the anime, the Kyuubi is said to be the strongest of the nine Bijuus scattered throughout the five countries. Nine Tails Thus, the Kyuubi, a nine-tailed fox, is a creature in its prime.
If he is not contained, or if the Kyuubi is not resealed and Naruto grows all nine tails of the Kyuubi, he will, in a sense, die, and the Kyuubi will once again be released to wreak havoc on the world. At that point, he completely loses control of himself and he will begin to attack everyone - friend or foe. So far, in both the manga and in Naruto Shippuden, we have only seen up to four of Naruto's tails. The number of tails that grows out of Naruto, the stronger he becomes and the more he loses control of himself. In the anime, when Naruto succumbs to the Kyuubi's temptation of power, his charka leaks out and forms like 'tails'.
The number of tails the kitsune has indicates its age, its wisdom, and its strength. The kitsune can have several tails, ranging from one to nine. However, it most commonly transforms into a beautiful woman, a seductress, much like 'Naruko', Naruto's female form when he does his Oiroke no Jutsu. The kitsune can transform into a human being, a skill it learns when it reaches a certain age, usually 100. In fact, the Kitsune is often called a 'trickster' and incidentally, this is how Naruto is portrayed at the beginning of the story.
The fox, as portrayed in Japanese folklore, is a cunning creature, intelligent but mischievous. Translated, Kitsune means 'fox'. Indeed, the Kyuubi is based on the Japanese mythological creature called the Kitsune. Kishimoto-sensei certainly didn't just pull this Kyuubi legend out of his hat. Kyuubi's Origins But where does the Kyuubi's origin lie?
Naruto does a 360, changing from the lovable prankster that we all love to a rampaging monster who, if he passes a certain point, can no longer distinguish friend from foe. And, when Naruto is unable to contain his strong emotions, he becomes consumed by the Kyuubi, losing both his sanity and control in a bout of pure and unrestrained rage. Naruto, for all his kindness, is often plagued by the Kyuubi's efforts to tempt him with raw power. The Kyuubi, as I'm sure most Naruto fans know, is the nine-tailed demon fox once ravaged Konoha and was sealed by the fourth Hokage inside the body of Uzumaki Naruto, the series' main character.
This rendition of the Japanese mythical creature, the Kitsune, is one of the most mysterious and interesting characters in the anime. Few things in the anime, Naruto, can charge the atmosphere with as much as excitement and as much awe as when Kyuubi appears on screen.