<p>1) Originally claimed to be made up of the chakra of the other Tailed Beasts and also the ancestor of the entire chakra. © Kurama / Nine-Tails </p><p>Bottom line: Ten-Tails - chakra. </p><p>2. Then, after hitting the Tailed Beast Ball by the Demonic Statue of the Outer Path, Naruto says that the chakra statue has disappeared. Later, Naruto says again that the evil chakra of the statue has disappeared and Kurama adds that the creature has no emotions, so it is impossible to feel it. </p><p>2.1. That's where the fun begins. Kurama says that Ten-Tails is natural energy circulating around the planet, this is what Naruto feels in the earth, water and air. (Here we are shown four spheres that imply the natural energy of earth, water, air and Ten-Tails.) </p><p>Bottom line: Ten-Tails is natural energy. </p><p>3. Further, Uchiha Obito being Jinchuriki Ten-Tails uses Truth-Seeking Balls, but not the essence. After senjutsu attack by Gamakichi (by the way, why he suddenly decided to use Senjutsu?), Naruto notices that Senjutsu > Truth-Seeking Balls. Naruto also notes that Ten-Tails is like nature itself, and Saske confirms that natural energy can only be defeated by natural energy. </p><p>Bottom line: Ten-Tails is natural energy. </p><p>4. After a few volumes, by the time Black Zetsu betrayed him, he was pumping the chakra out of the victims of Infinite Tsukuyomi, to which Naruto says even Ten-Tails had less chakra. </p><p>Bottom line: Ten-Tails is the chakra. </p><p>There's a lot of contradictions, don't you think? </p>