Yagura Karatachi

Little is known about this Jinchūriki yet. He hailed from Kirigakure and was the host of the Three-Tailed Giant Turtle. However, when Deidara and Tobi fought the Three-Tails, Deidara claimed the beast was weak because it had no host. This might possibly be because this Jinchūriki died.

Speculation
It is suggested that this shinobi may be related to Yūkimaru, as they have similar appearances. Also, Yūkimaru can control the Three-Tails. It should be noted that Yūkimaru only appears in the anime.

Trivia

 * It is unknown weather this Jinchūrik's marking on his face is a scar, or a sign of his holding the Three tails inside him (similar to Naruto's fox whiskers).