Board Thread:Naruto Discussions/@comment-4912646-20141016191738/@comment-4728499-20141016215725

It seems like people can only be considered proper Jinchuriki if they have a portion of the tailed beast's soul/intelligence inside them, so Minato and Naruto both being Kurama's Jinchuriki or Naruto being the Jinchuriki of all nine beasts because there's a copy of them living inside him with the originals being trapped by Sasuke. Kinkaku and Ginkaku, I'd assume they are able to gather Nine Tails chakra due to eating Kurama's flesh but aren't able to fully transform into Kurama since they don't have the consciousness of Kurama within them, hence them not actually being Jinchuriki.