is one piece episode 954 filler?

Zoro chases Gyukimaru, but he goes into an run-down doorway and disappears. Hiyori and Kawamatsu decide to walk together, but are attacked by another wave of bandits.

Kawamatsu fights them off, and explains what happened after he lost Hiyori. Thirteen years ago, after Hiyori ran away, he decided to leave to Ringo.

Ringo was a region that was previously ruled by the daimyo Shimotsuki Ushimaru, who was with the company of a fox, Onimaru. However, when Orochi overthrew Oden, Ushimaru was killed and Ringo fell.

Kawamatsu found a mass burial site with Eternal Graves.