Board Thread:Wiki Discussions/@comment-3238846-20140422105553/@comment-28861328-20140427222726

Seelentau wrote: Hmm, the third databook states (as literal as possible) "At the journey's end by borrowing Yonbi's power, (Roshi) mastered the earth and fire natures fusing Yoton Ninjutsu." or (not so literal) "At the the end of the journey, Roshi mastered the Yoton Ninjutsu, which fuses fire and erath natures, by borrowing Yonbi's power."

Was this not precisely what Naruto was doing by asking Son to use his chakra? What is your argument again?

Edit: I will thank you, though, because this blows Elve's "he knew Fire and Earth beforehand" right out of the water.

Edit 2: If anything, the third databook confirms that a jinchuriki can master the elements needed to use Lava just by borrowing (which Naruto did) power from Son Goku.