Board Thread:Naruto Discussions/@comment-31196611-20180119183908/@comment-734582-20180212072402

Judara wrote: Theoritically since they were former jinchuriki it was easy to seal or place a link with the tailed beasts and the six whereas Madara is becoming jinchuriki first time We don't know if this is true. It could be that Obito was simply looking for firepower.

Actionmanrandell wrote: the biju were not sealed inside the reanimated jinchuriki, they were sealed inside the Gedo Statue. Obito simply was transmitting the chakra to each jinchuriki body Naruto's talk with Son on the mental plane implies they were sealed in the Jinchuriki. It's just that they were still bound to the Gedo Statue. In essence, the biju were a manifestation of the Gedo and not truly free (compare Kurama being manifested by Naruto in The Last).