User blog comment:Xilinoc/Ch. 637 - BABY, HOLD YOUR HAND/@comment-3536902-20150803044821/@comment-11293956-20150803171549

Its probably because its seems like everyone went up to the Royal Palace wihout him. For all we know, he's still in the seireitei. Then again, they could have brought him up and he's just been off screen this whole time.