Board Thread:Questions and Answers/@comment-173.2.124.30-20141107051715/@comment-70.179.7.220-20141113030900

His death is heavily implied, but not necessarily confirmed.

Arima stabbed Kaneki, but he isn't necessarily dead. The end with the "Erased" could mean a variety of things, one of which is him being brainwashed into being a dove named Haise Sasaki.

I'd like to think it's all a red herring to lead us to believe Kaneki is dead, especially since there's also a lot that points toward Sasaki being Kaneki, but Ishida could very well be trolling us.