Board Thread:Theories and Speculation/@comment-27821284-20160218112823/@comment-3965545-20160222183415

You have to have a way to generate the chakra by yourself, such as your own blood and flesh creating it. Hinata(and Hiashi, Hizashi, Hanabi, Neji) may be a direct descendant of Hamura.. but they are nowhere as close to him as Toneri is. Toneri us a pure Otsutsuki straight from Hamura's bloodline. Hinata will need Toneri's flesh to awaken the Tenseigan in her. Dojutsu user needs the body(a piece of flesh/dna) of the other, and the body needs the eyes of the dojutsu user. It's really simple actually.