User blog comment:Xilinoc/Ch. 541 - THE BLADE AND ME 2/@comment-2211792-20130617043750

I think now I know why Tensa Zangetsu looks young. Old Man has admitted he's been suppressing Ichigo's Soul Reaper powers and provided him with his own power instead. So, does that also include bankai? If it does, then I think Old Man pulled a Nel: gave a f**kton of his power to fuel Ichigo's bankai and turned younger as a result of losing that power. That being said, he was still strong enough to kick Ichigo's ass even before merging with Hichigo...