User blog comment:Xilinoc/Ch. 545 - Blue Stripes/@comment-6904925-20130709150928

What really interested me was Shunsui showing up to Ichigo friends and announcing about them "parting ways", something like this was mentioned before back 518 when Kūkaku Shiba saying they had let him go even if it meant making their Uncle (Isshin) sad, they could be connected to what Shunsui said, also in 529 Ōetsu Nimaiya chat with Renji when he said that Renji didn't stand up for Ichigo, hinting he knows about his origin, as Ōetsu claims he knows the exact position of all the Zanpakutō that he has ever created, no matter how the wielder attained it or who the wielder is I think the every captain, vice captain and every soul that Ichigo has come across, all know about his origin.