is bleach episode 59 filler?

While running up the stars along the backside of Sōkyoku Hill alongside the other Ryoka, Ganju Shiba comments on the intense Reiatsu they are senses that only gets heavier as they get nearer to the top and questions if it really belongs to Ichigo Kurosaki, though Uryū Ishida admits that he cannot be certain. Upon reaching the top of the stairs, the Ryoka find themselves before a copse of dead trees and realize that Ichigo's battle is taking place on the other side, which they cannot see.