Episode 315 - The Final Mission of the Straw Hat Buccaneers! Luffy's Vow to His Companions

Episode 315
The Straw Hat Pirates’ Last Quest! Luffy’s Promise to His Crew
Japanese: 麦わらの一味、最後の冒険！ルフィの仲間への約束
Mugiwara no Ichimi, Saigo no Bōken! Rufi no Nakama e no Yakusoku

As the revolution intensifies, the crew becomes entangled in the struggle between the oppressed islanders and the ruling power. Luffy and his friends must choose their side in the conflict, and the episode delves into the personal stakes each crew member has in fighting for justice.