User blog comment:Godisme/THE LOST/@comment-919115-20111208042603/@comment-1268838-20111208155518

I had assumed the same thing. The chapter that Ginjo first mentioned Ichigo learning Fullbring was the same one in which he mentioned that all Fullbringers had parents attacked by Hollows. He stated that Ichigo should know the burden of possessing Hollow powers - that connection has always been the only logical cause of Ichigo's ability to use Fullbring.

It should be noted that Ginjo did not seek Ichigo out until his reiatsu began to return, as Orihime and Uryu noticed. Since Ginjo knew that Ichigo had Hollow powers, that could have been the opportunity he was waiting for. Of course, Ichigo's powerlessness was a vital component in Ginjo's plan.