Talk:Ken Kaneki/@comment-31851209-20170722113311/@comment-74.4.242.241-20170723190539

Other complete kakujas shown have had two things in common:

1) Control over psyche. Kaneki definitely has this after his breakthrough against Arima. However, we've seen other incomplete kakuja have control over themselves, with the first example that comes to mind being Kurona.

2) Complete body coverage. EVERY full kakuja we've seen has covered the entire body. Kaneki's covered his upper torso.

That's speaking in-canon. Even without that, it would just make sense for Ishida to keep Kaneki's full, true kakuja in the pocket for the big finale where he overexerts himself like his mom and dies saving everyone.