Board Thread:General Discussion/@comment-4957813-20131130185522/@comment-11051098-20140605163732

Chapter 109, page 17

http://www.mangapanda.com/94-563-16/bleach/chapter-109.html

On a side-note:

Kenpachi couldn't communicate with Nozarashi, he couldn't know for sure if it was sealed or released. Considering his immense reiatsu, he could have had a sealed Zanpakutô for all these years, thinking it was released. He's so powerful that it's possible he could have been this strong all the time and still only had a sealed Zanpakutô.