is one piece episode 993 filler?

On the top of the castle, Law and Bepo break away from the group to achieve their own goals. However, the remaining samurai are attacked by headless samurai on horseback, deducing they are drawings made by Kanjuro.

Kanjuro comes out of the castle door and confronts them, revealing what happened to Momonosuke. Momonosuke attempted to escape by cutting his ropes using a knife.

Although he managed to cut Kanjuro's hand, he was brutally beaten unconscious and taken to Orochi. Kanjuro finishes by announcing Momonosuke's public execution at the party.