manga said he tried to use it on fugaku (sasukes dad) before danzo stole his eye. So may be shishui used ka on fugaku then danzo broke fugaku out of it then while shishui could not use ka he snatched it with help from his henchmen (oro and that other guy)
"Can You Still Dance" - Madara Uchiha to Might Gai
Re: is Danzo > Shuisui Uchiha?
Are you kidding me, shisui is an uchiha, not just that apperently bee during the battle of edo nagato and edo itachi called him "shisui the teleporter" he might have a special just as well or the kamui will just have to see it coming or something