One Piece — Episode 1013: Yamato’s Past! The Man Who Came for an Emperor of the Sea!

You are watching the episode Yamato’s Past! The Man Who Came for an Emperor of the Sea! Yamato tells Momonosuke and Shinobu that he once confronted a man, who came to Onigashima looking to get Kaido’s head. His name was Ace. The two of them engaged in a fierce battle that eventually turned into an important friendship.