is bleach episode 297 filler?

Isshin and Aizen begin battling each other, but Aizen is able to dodge all of Isshin's blows. Aizen eventually finds an opening and hits Isshin with Hadō #63 Raikōhō.

As this happens, Gin remarks that it's been a long time since he and Ichigo last battled, and he asks Ichigo if he remembers that battle. However, Ichigo states he doesn't and Gin asks if he's trying to provoke him.

Ichigo explains that he is not saying that he does not remember his sword, but rather his heart. Ichigo further explains his philosophy on battle.