エピソード287 - 最終段階！ルフィと仲間たちが最大の敵に立ち向かう

Episode 287
The Final Stage! Luffy and the Crew Confront Their Greatest Foes
Japanese: 最終決戦！ルフィと仲間たち、最大の敵と対決
Saishū Kessen! Rufi to Nakama-tachi, Saidai no Teki to Taiketsu

The crew learns that the treasure is linked to a powerful ancient artifact, which holds the key to unlocking even greater mysteries of the Grand Line. The episode delves deeper into the world of ancient powers, and the Straw Hats must decide whether to continue searching for the artifact or leave it behind to avoid the impending danger.