User blog comment:Xilinoc/Ch. 571 (Yachiru's gonna wreck it)/@comment-11446176-20140305130913/@comment-10205398-20140305180701

All I'm saying is that at this point in the series, Kenpachi's Zanpakuto is classified as a constant-release type, and maybe Yachiru's is too. I don't know why you're debating me on this, it's been said in the manga in both chapter 109 and chapter 120 that is sword is always in it's released form. Kubo could decide to retcon this when Kenpachi comes back now that he can communicate with his sword, but as of right now, it's a constant-release type.