Board Thread:Naruto Discussions/@comment-26636534-20151016181609/@comment-1872728-20151025000040

Cjtrules15 wrote: This strongest technique is signature technique is incorrect. We've concluded that the reason why Naruto spams the Rasengan and variants (Rasenshuriken), is because he's been using it for years. He feels comfortable using this jutsu, and whenever he learns a more powerful jutsu, he wouldn't bother mastering it, and would rather implement it with his Rasenshuriken. So basically, his signature is not the strongest, but he would make it the strongest.