Board Thread:Naruto Discussions/@comment-26107879-20181004003653/@comment-33485854-20181115034837

LegionZero wrote: Piercing doesnt cause tunnel visions and Chidori is based off of Rasengan so there purpose is pretty much the same, especially considering that Rasengan is typically a one hit kill.

The execution is exactly the same, but only Chidori has a tunnel vision problem because of how it is executed? That makes zero sense.

No. The Chidori is a failed evolution of the Rasengan. And that failed jutsu was converted into am assassination piercing technique. The Rasengan grinds on contact and violently disperses to knock opponents back. For the Chidori to be effective it needs to be used quickly at high speeds.