Episode 509

"Contact! The Great Swordsman Mihawk - Zoro's Struggle of Willpower" is the 509th episode of One Piece.

Anime and Manga Differences

 * The anime shows that some of the humandrills have learned Zoro's Santoryu.
 * In the manga, Zoro has his entire conversation with Mihawk outside the castle. In this episode, part of the conversation happens inside the castle.
 * The anime shows Brook playing music for the cultists.
 * The anime also shows how the Longarms grab Brook.