is bleach episode 177 filler?

Rukia and Jinnai Dōko continue their fight. Rukia uses her surroundings to gain the upperhand, but Jinnai continues to sink his Reiryoku into his Bakkōtō as he devours another piece, once again forcing Rukia on the defensive.

Jinnai once again decides to target Rurichiyo Kasumiōji. Jinnai tosses Kenryū aside, but Enryū shields her from Jinnai's attack.

Rukia realizes that as long as he keeps getting stronger, they can't win. However, she comes up with a plan and attacks Jinnai with Kidō, then counters his attack with her Zanpakutō.

Rukia seems to be successful, as Jinnai is frozen solid. Jinnai breaks free, however, and frantically begins eating his Bakkōtō, which spells his demise.