is bleach: thousand-year blood war (bleach: sennen kessen-hen) episode 11 filler?

Outside the Hōōden in the Soul King Palace, Ōetsu Nimaiya infers that 6th Division Lieutenant Renji Abarai also noticed it would be pointless for Ichigo Kurosaki to continue battling the Asauchi. With Renji looking away, Nimaiya reveals that he knows the location of every Asauchi he has ever forged and details how Shinigami transform them into personalized Zanpakutō through continuous training, which is the foundation of the relationship between the two and an absolute truth.