is bleach episode 178 filler?

Ichigo once again finds himself trapped in Hanza's Bakkōtō. Ichigo sees an image of his younger self and remembers his mother and her death.

From the outside, Hanza watches and reveals that his Bakkōtō's true power is hypnosis. Hanza states that he will have Ichigo suffer the worst nightmares he has ever had, before dying.

On the inside, Ichigo suffers through his mother's death, however Masaki returns. Masaki turns on Ichigo and slightly hurts him.

Ichigo begins to remember that his mother died many years ago. He starts to realize this isn't real.

Masaki begins to strangle him, and Ichigo lacks the resolve to resist.