Board Thread:General Discussion/@comment-10786787-20130613005503/@comment-11051098-20140608122044

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:
 * "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"