The 21 year old winger has been given international clearance and signs for Craig Levein's side until the end of the season.
"James is somebody I had as a kid at Leicester but his career has been hit by injury," added the former Foxes manager.
"For example, he has just recovered from a broken ankle but I doubt we would have been able to get him had he not been battling his way back to fitness.
"I know he is a little bit away from being fully fit but I would expect him to be ready to play, if not for the Inverness match then certainly the week after that (away to Aberdeen)."