is bleach episode 48 filler?

With 10th Division Captain Tōshirō Hitsugaya and his captain, Gin Ichimaru, staring each other down while exerting their Reiatsu and gripping their Zanpakutō, an intimidated 3rd Division Lieutenant Izuru Kira expresses concern for Gin, who instructs him to stay back if he does not want to die yet. However, Hitsugaya asserts that it is not enough to simply stay back and orders Izuru to run away even after he can no longer see them because he may die if he is within three ri of Hitsugaya.