Shukaku (守鶴, Shukaku), more commonly known as the One-Tail (一尾, Ichibi), is one of the nine tailed beasts. It was last sealed within Gaara of Sunagakure, after being sealed in two other jinchūriki before him.
He is voiced by Kirk Thornton in the English Version.
Shukaku is a sandy-brown tanuki, with black (dark blue in the anime) cursed seal markings all over its face, body, and tail. It has a jagged, concave mouth with no tongue, and the sclerae of its eyes are black, with yellow irides and pupils that each takes the shape of a black four-pointed star with four black dots around it. During the last days of the Sage of Six Paths, Shukaku in its youth looked the basically same as it does presently, only much smaller with shorter ears and more spaced out markings.
Shukaku is characterised as a childish and short-tempered individual, and often speaks in a bombastic and incoherent manner, giving it the demeanour of a drunken madman. It uses "ore-sama" (オレ様, Literally meaning: my esteemed self) when referring to itself, as it expresses great pride in its own abilities, especially its sealing techniques and defences. According to Gaara, prior to its introduction, Shukaku relishes the opportunity to kill anyone in sight, even more so during a full moon. Shukaku has also shown to harbour a bitter grudge towards Kurama due to the fox's beliefs that the tailed beasts' strength is measured by the number of tails, therefore viewing the tanuki as the weakest. Because of this, Shukaku strives to find any opportunity to surpass its arrogant rival.
- His English Voice Actor, Kirk Thornton is best known voicing as Gabumon & his digivolution from Digimon Adventure series, Homer Yushima from Digimon Data Squad, Shiro Fujimoto from Blue Exoricst, Saitō Hajime from Rurouni Kenshin, Klein from Sword Art Online.