User blog comment:Godisme/Shades of the Bond/@comment-1752488-20111130175445/@comment-1351982-20111130195450

I think it is because Kugo absorbed his fullbring. He was able to use getsuga tensho, so why couldn't he use Ichigo's power to achieve bankai. However Kugo may have already achieved bankai in the past, so we will wait and see.