Board Thread:General Discussion/@comment-10786787-20130613005503/@comment-5693502-20140608152851

Sternritter M wrote: Sorry, what I meant to say was that being able to cut through anything is his Shikai's ability, according to Kenpachi himself.

Chapter 573, page 16: Well that doesn't explicitly say, "My shikai ability has the power of absolute cut" that just sounds like Kenpachi trash talking like he usually does. Reminds me a lot of the time Kenpachi was fighting Nnoitra: "You can't cut me !!" and then the Arrancar ends up bisected.
 * "I'll slash you the same way I'd be cutting steel"
 * "With your imagination, you can't create anything I can't cut through"

Apart from the obvious boost he gets from being able to communicate with his shikai I don't think Nozarashi offers him any special ability or special technique(s).