Board Thread:General Discussion/@comment-4976518-20140808063123/@comment-28044177-20170102005553

ChibiBuu wrote: Aizen trapped countless amount of entities in his Kyoka Suigetsu without even uttering the summoning chant, which means he has achieved materialization and is presumed to have bankai.

What proof we have that Aizen released Kyouka Suigetsu without a command? I mean, it was revealed that Aizen always had KS on during the FKT fights(which made their plan of preventing him from using it fail). He clearly used a command when using KS on Baraggan. And it's unknown if he didn't use it when demonstrating it to the Gotei soldiers.