Board Thread:Naruto Discussions/@comment-4912646-20141016191738/@comment-24531362-20141016201905

As far as my mind goes, a Jinchuuriki is someone who:

a) had all or part of a Tailed Beast sealed within them through fuinjutsu (Naruto, Gaara, Minato, B, Rin, Obito, Madara, Black Zetsu, likely all of the other Jinchuuriki killed by Akatsuki)

b) was given Tailed Beast chakra permanently by the beast itself (Naruto, but not Kakashi)

c) extracted a beast from within the Ten Tails (Obito) I am not entirely sure whether or not Obito used a fuinjutsu to contain the beasts within himself, ergo I am placing it in its own category for now. I cannot think of a way he could have contained the beasts without fuinjutsu or wiling compliance though, so there's that