is bleach episode 324 filler?

In his underground training hall, Kisuke Urahara has assembled Captains Tōshirō Hitsugaya, Byakuya Kuchiki, and Sajin Komamura. He apologizes for taking too long, informing them that the adjustments are nearly finished.

Hitsugaya asks him whether they will be able to pass through the Dangai, as Komamura wonders if it is under the complete control of Inaba. However, Kisuke speculates that Inaba cannot control the Kōtotsu, claiming that it appeared frequently in that time period.