Installment 640 - The Legacy of the Pirate Ruler! Luffy's Vow to Tomorrow

Episode 640
The Pirate King’s Legacy! Luffy’s Promise to the Future
Japanese: 海賊王の遺産！ルフィの未来への約束
Kaizoku-Ō no Isan! Rufi no Mirai e no Yakusoku

The World Government launches a full-scale assault against the Straw Hat Pirates, determined to capture them and obtain the treasure’s power. Luffy and his crew are forced to fight against overwhelming odds as they defend the island and its secrets. As the battle reaches its peak, the crew uncovers the truth about the treasure's origin.