One Piece Tops 600 Million Copies, Oda Sinks Treasure Secret

One Piece, the long-running manga series by Eiichiro Oda, has surpassed 600 million copies in circulation worldwide, marking it as the best-selling manga of all time. To celebrate the milestone, Oda revealed in a special video that he has written down the long-hidden truth about the series' titular treasure and sealed it in a miniature chest, which was then sunk to the ocean floor at a depth of 651 meters.

The video, released on the official One Piece YouTube channel, shows a silhouetted figure, believed to be Oda, writing on a piece of paper before tearing off a section and placing it inside the chest along with small items. The chest is enclosed in a pressure-resistant glass sphere resembling a Log Pose, a navigational device from the series, and lowered into the sea by a team including Japanese coast guard personnel. The project was conducted in collaboration with the Japan Agency for Marine-Earth Science and Technology and the Cross-ministerial Strategic Innovation Promotion Program, ensuring safe deployment and filming. Officials plan to retrieve the chest once the series concludes, preserving the secret until then.

Oda has long guarded the nature of the One Piece, the...