Board Thread:Wiki Discussions/@comment-25217769-20140723231559/@comment-4271790-20140801183230

I'm not sold on Asura being a jinchuuriki. I think Asura was a Sage and could use senjutsu chakra. Due to that, I honestly think those black balls on his chakra avatar were Truth-seeking Balls. Not tailed beast balls. You don't need the Ten-Tails chakra to use TSBs, you need senjutsu chakra. Obito is proof of that, in chapter 666, Madara noted "It was correct to use [Sage] Mode. Were you able to suck a little of that power, too?" Obito took three chakras from Madara. Along with the One-Tails and Eight-tails chakra, Obito absorbed senjutsu chakra from Madara's chest in 665, which caused the TSB to form in Obito's left hand, despite not being the TT jinchuuriki. I think Asura was a Sage like his father and could use senjutsu chakra to the highest point, which caused TSBs to form in his chakra avatar. When Obito was the TT jinchuuriki, ninjutsu could not damage him or the TSBs. But senjutsu chakra did tho. And in chapter 643, Naruto confirmed that the TT was a mass of natural energy, and that natural energy could damage natural energy. The natural energy from senjutsu attacks damage a TT jinchuuriki and his TSBs, and we know the TT jinchuuriki has natural energy due to the TT, and natural energy being able to damage the TSBs means that the TSBs are composed of natural energy as well. So I think that Asura's chakra avatar had TSBs, cuz he could access Sage Mode like his father.