Once inside, the warden, Mui, uses a special technique to place a seal on Naruto's chest called the "Fire Style: Celestial Prison," which severely limits his chakra and causes him agonizing pain whenever he tries to use it. Stripped of his power and freedom, Naruto must survive in this brutal environment.
The setting of Hozuki Castle was so popular that it was later integrated into the official canon. The prison appears in the Kakashi Hiden light novel and was officially animated as a major story arc in the anime series. Seeing how the prison operated during Naruto's youth adds great context to its later appearances. Naruto Shippuden Movie 5 Blood Prison Download English 36