Eiichiro Oda, the renowned creator of the global phenomenon 'One Piece', has commemorated a significant milestone for the series—over 600 million copies in circulation—by revealing the secret of the treasure. In a symbolic act, Oda wrote down the answer to the long-asked question, 'What is the One Piece?', and then submerged the document in the sea, further engaging fans with the lore of the series. This event not only cements his commitment to the narrative but also stirs excitement among fans who have speculated about the treasure since the series began in 1997.

'One Piece' has achieved staggering success, with over 450 million copies sold in Japan and an impressive 150 million abroad, making it one of the best-selling manga franchises in history. As part of the promotional efforts marking the 600 million milestone, Oda's unique approach of blending storytelling with an actual treasure hunt has reignited discussions among readers about the fate of the main character, Monkey D. Luffy, and the legendary treasure he seeks. The mystery surrounding 'One Piece' has captivated audiences for years, and Oda's decision to write down the secret signifies an engagement not only with the story but also with the fans who have followed it for decades.

Oda's act of writing the secret and sinking it serves as a reminder of the enduring impact of 'One Piece' on popular culture. As fans await the conclusion of Luffy's journey, this symbolic gesture enhances their emotional investment in the story and underscores the importance of community among fans. It invites speculation and excitement, ensuring that the legacy of 'One Piece' will continue to thrive well beyond the pages of the manga itself, as readers ponder the content of the document hidden beneath the waves.