Talk:Arata Kirishima/@comment-86.185.7.17-20150203064455/@comment-10733658-20150321181359

^ Interesting points, but it seems that the Kakuhou transplant is handled as a traditional organ transplant surgery. The Kakuhou is a complex organ, and Dr. Kanou mentioned having an incredibly small success rate even with making sure to match AB blood type. (We also saw Kaneki taking medication right up until the Aogiri Arc.)

Plasma donation is far more flexible than blood or tissue donations. We already know the kakuhou transplant is super-high risk, so I doubt Urie got his Kakuhou from Arata. On the other hand, Arata being A means that if they ever did use him for a transplant......they've got a large pool to draw from since A is the most common blood type in Japan.

(I've theorized Yoshimura is probably O, meaning Kanou has a much larger pool to draw from since that's the universal donor.)