Board Thread:General Discussion/@comment-12301089-20131211070550/@comment-44061-20131212173918

Firstly "It usually takes 10 years or more to achieve, plus the experience needed to master it." - Chapter 127. Secondly "Ichigo and Urahara used a special device created by Urahara, which forcibly materializes a Zanpakutō spirit (thus bypassing a large portion of the training), they attained their Bankai within three days instead of the normal hundreds of years." - Chapter 120. Thirdly Renji had already been training to achieve bankai for some time and happened to achieve it around the same time ichigo got his, though proven by his fight against byakuya having a bankai and the type he has which he hasnt mastered meant nothing. You wanna know why it is impossible for Kenpachi, for all his strength the one thing that even newbies at the academy are capable of (zanpakuto communication) he was never capable of until recently. Strength is not how one gains zanpakuto advancement this isnt DBZ.