is one piece episode 965 filler?

Orochi became Oden's proxy as he was at sea, but the other daimyos suspected him because he was a member of the Kurozumi Family. Orochi's past is revealed.

In his childhood, he and his family became hunted because of what his grandfather did. Orochi hid away in the forest and found a desolate cabin.

Inside there was an old man and woman, Semimaru and Higurashi. Higurashi explained the truth about Orochi's grandfather.

Since the Kouzuki shogun was infertile, daimyos from the Shimotsuki, Kurozumi, Uzuki, Amatsuki, and Fugetsu Families all fought to be the next heir.