Talk:Ken Kaneki/@comment-186.81.176.124-20150610173357/@comment-25047329-20150610181500

I think it was just good old fashioned bad luck. The reason why Kanou let Kaneki run around freely was because he was only a prototype that was stitched together on the fly to see if the transplant would be successful enough to work on others. From his lab, we can assume that Kanou retried the experiment dozens of times and only had three successes. Kaneki, the twins, and Rize all have the same blood type, but after multiple failurs, Kanou deduced that success of the transplant probably wasn't blood related.

Kaneki was never expected to evolve as far as he did, so it wasn't planned.