Episode 598 - The Straw Hat Pirates' Tradition Lives On! Luffy's Ultimate Oath

Episode 598
The Straw Hat Pirates’ Legacy Continues! Luffy’s Final Promise
Japanese: 麦わらの一味の遺産は続く！ルフィの最後の約束
Mugiwara no Ichimi no Isan wa Tsudzuku! Rufi no Saigo no Yakusoku

The crew arrives at a strange island that seems peaceful at first, but soon discovers that the inhabitants are hiding a terrifying secret. The island is cursed, and anyone who attempts to leave is trapped forever. Luffy and the crew work together to uncover the truth and find a way to escape the island’s dark magic.