Talk:Ken Kaneki/@comment-216.150.107.46-20150130101755/@comment-10733658-20150130103000

He has amnesia, though it hasn't been explained exactly how much is psychological (from his breakdown) and how much as a result of the injuries Arima inflicted on him.

Basically, the end of the series when the two Kanekis are like "let's rest for a bit" that is essentially when he started to become Haise.

He hallucinates or dreams about what is basically Centipede/Dream!Rize, all the negative trauma trying to get him to remember.