Talk:Akira/@comment-28805742-20160824085620/@comment-3359777-20160831014151

I don't think it's ever disclosed whether Akira retained his calculation ability after the tumour was removed, or even how much of his abilities were directly the result of the tumour's effects. I've re-read (well, skimmed) through the whole series just to check, but it doesn't go into detail.