"[To BG9] And you thought I would leave it that way forever? After my battle with Yoruichi-sama, I honed my Shunkō to completion And since then, I have pushed my ability to the limits, taking the technique further still. My Shunkō is "wind". I have perfected a method of causing the Reiatsu I release to flow like a vortex around my body indefinitely. As such, once I have activated my Shunkō, I am now able to maintain it for as long as proves necessary. You have my thanks. If you had not stolen my Bankai, I may never have honed my Shunkō to this level of mastery."