Board Thread:Theories and Speculation/@comment-26958911-20160827210047/@comment-9782468-20160912041640

Chidori is not Rasengan + Lightning Release. Kakashi made Chidori because he failed, but Chidori did not burst forth from the attempts to combine Lighnting and Rasengan.

Indra was the prodigy, not Asura.

Asura did not create the Rasengan, and whatever technique he did make, Minato wouldn't have taken it. They lived a great many generations apart.

Kakashi created the Chidori.