One Piece episode 523 English Subbed Episode Description: At the Sabaody Archipelago, Caribou has his men bury the Fake Straw Hats and departs to find the real Straw Hats. Rayleigh remembers that Luffy's Straw Hat actually belonged to Roger when they first met decades earlier. Meanwhile, the Straw Hats explore the vast regions of the deep ocean. Nami reveals that if too many holes are created, the coating will burst and destroy the ship. Franky reveals that Hatchan was taken to Fishman Island, as he was seriously injured when the Marines tried to claim the Thousand Sunny. It is also revealed that Kuma informed Rayleigh that he sent them away to help the Straw Hats, as he is a revolutionary. Kuma was eventually reprogrammed to protect the Thousand Sunny until the Straw Hats' arrival at Sabaody. The Straw Hats soon realize that they are being followed by Caribou. Using Mohmoo, the sea cow that used to belong to Arlong, as a steed, Caribou and his men prepare to launch a preemptive strike.