Board Thread:Theories and Speculation/@comment-33202319-20150622205123/@comment-734582-20150627122434

Ashzure wrote: Hmmm it looks like that Boruto uses is raikiri just like kakashi uses,but i believe that is lightning release rasengan,because of spheres on boruto's hand. If you play the trailer at 1/4th speed, you can clearly see that he uses two separate jutsu. one is Mini-rasengan and the other is Chidori. Raikiri does not seem to have the chittering bird effect.

Furthermore, Chidori is a mass of lightning chakra in one's hand. It has no real shape transformation. Sasuke could transform it into a blade, but did not go further than that. Raiton: Rasengan would likely be a mass of violently rotation chakra with a powerful tip (like a kunai). After all, Futon: Rasengan is a wind-chakra rasengan with tiny blades like a Shuriken. Judging from the naming convention, i'd expect RaiKunai: A rasengan coated in a "kunai" of lightning chakra not unlike Chidori. However, i think it's well beyond Boruto's capability right now.

Wind's specialty is cutting/blasting. Lightning's specialty seems to be shocking/penetration. Earth sees to be Defense/Crush. Water seems to be blast/crush. Fire seems to be Burn (how unexpected :) ). Hence, by extrapolation:


 * Fire style: rasengan. Violently rotating mass of fire. Looks like: sun.
 * Earth Style: rasengan. Violently rotating mass of earth. looks like: spiky ball
 * Water Style: rasengan. Looks like: water balloon test.
 * Lightning style: rasengan. looks like: orb of electricity / plasma balls in glass