Board Thread:General Discussion/@comment-5398287-20130625202043/@comment-6007020-20140516221104

We've covered that, Kamikaze.

I think the reason Hisagi doesn't have Bankai is that he refuses to speak to his Zanpakuto anymore than call on his Shikai. It's already established he hates the form of his Shikai, so I wouldn't be suprised that he'd be slightly afraid of what his Bankai would be.