User blog comment:Xilinoc/Ch. 571 (Yachiru's gonna wreck it)/@comment-11446176-20140305130913/@comment-11446176-20140305140050

Kenpachi doesn't have a constant release though... To be released in the first place, you need to be able to know the name of the Zanpakutou...

There was mention by him of it being "constant release", but its also debatable that its also not him understanding what a "constant release" is...