is one piece episode 926 filler?

Most of the Big Mom Pirates survive the attack from King unharmed, but they are separated from Big Mom, who is sinking to the bottom of the sea. Meanwhile, Komurasaki finishes her song on her shamisen.

Robin is confronted by the Orochi Oniwabanshu, who offers her a quick and painless death if she told them the truth. Robin attempts to lie to get out, but the ninjas detect this and attack her.

Robin attempts to escape but one of the ninjas captures her with a grappling hook on a rope. Another ninja attacks her with shurikens.