Kokuou (The Five-Tails)

Kokuou, better known as the Five-Tails, is a tailed beast that was sealed within Han from the Hidden Stone Village. It has been captured, extracted, and sealed by Akatsuki. In the anime, Kokuou is indicated to have been one of the two tailed beasts that Akatsuki captured before the start of Shippuden. It was later resealed into a resurrected Han during the Fourth Great Ninja War.