Board Thread:Naruto Discussions/@comment-24847491-20140921145042/@comment-24519434-20140923233841

Haxs wrote:

Yeah but every technique has to be learned unless it comes natural. He must have learned it from somewhere cause he did't start using it till he was an adult.

So who did Minato learn Rasengan from? And Who taught Kakashi Lightning cutter?

People can develop their own Ninjutsu. And wood element is just what you get by mixing Water and Earth chakra (Hashi makes full trees because of Ashura's Yang chakra, which Naruto showed causes Wood Release to turn to trees).