is bleach episode 144 filler?

, Yasutora Sado, and Uryū Ishida break into Hueco Mundo. Ichigo Kurosaki, Yasutora Sado, and Uryū Ishida break out of the Garganta they were traveling through and into Hueco Mundo in search of Orihime Inoue.

Upon landing on the floor of the building they emerged in, Ichigo is surprised by Hueco Mundo being solid instead of slimy, though Uryū cautions him to lower his voice since their entrance cannot have gone unnoticed. With Ichigo continuing to wonder if this is really Hueco Mundo, an irritated Uryū demands to know if he is listening.