Rōshi was the jinjuriki of the Four-Tails that hailed from Iwagakure. The Four-Tails has been captured and sealed by Akatsuki, causing his death when the beast was extracted. However, upon his resurrection, the Four-Tails appears to have been resealed within Roshi.
Abilities
He has been noted to be a very powerful shinobi. Kisame, a powerful Akatsuki member himself, stated that he was not one to play around with as he was a tough one to capture. He was also seen using a curved kunai with which it can be assumed that he had proficiency wielding.
Rōshi became the jinchūriki of the Four-Tails at a very young age. He left his home town of Iwagakure at some point to better understand and control the power of the beast within him.

