Shukaku, also known as the One-Tail, is a powerful tailed beast in the anime series Naruto. It is characterized by its tanuki-like appearance and mastery over sand-based abilities. In the story, Shukaku is initially sealed within Gaara, a ninja from the village of Sunagakure, causing Gaara to struggle with control and isolation. Shukaku's role in the series is significant, as it represents a key element in the balance of power among the tailed beasts, and contributes to the broader narrative of jinchuriki and their connection to their beasts.