User blog comment:Godisme/Everything But The Rain/@comment-28861328-20130307061758/@comment-28861328-20130307063454

You still cant waste away chapter 398. Aizen is no fool. Ichigo is a Shinigami. Period. The first page of that chapter all but outright says it. Also, I read your link, and all it says is that Isshin abandoned the form of a Shinigami. Nothing there suggests he lost his powers. Just that he gave up being a Shinigami.