Board Thread:Questions and Answers/@comment-108.201.54.226-20151027001921/@comment-25047329-20151104021152

Ninja Of War wrote: Does a ghoul's ability to regenerate depend on the condition of the kagune?, during Kaneki vs Yamori, it was implied that consuming Yamori's kagune would stop him from regenerating. It looks like the kakuhou is what a ghoul mainly relies on to regenerate. It's been a while since I read that part of the manga, but from what I recall, as a kakuja, Yamori had several kakuhou. Kaneki ate a few of them slowing down his regeneration, but he was able to recuperate a little before Juuzou got there. Just not enough to fully recover in time and defend himself.

Nashiro was also dying because Juuzou had damaged her kakuhou too much and Shirazu temporarily couldn't summon his kagune when Kanae stabbed him in the kakuhou.