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Eiichiro Oda will serve as executive producer for the series alongside Tomorrow Studios' CEO Marty Adelstein and President Becky Clements. Steven Maeda is the series' showrunner and, along with Matt Owens, an executive producer and writer.
The series was first announced on July 21, 2017 by Weekly Shonen Jump editor-in-chief Hiroyuki Nakano to commemorate the manga's 20th anniversary. In January 2020, it was announced that the first season will consist of ten episodes, with the plot starting at the East Blue Saga.
With the series's announcement, Oda commented that "the first condition [he] presented is that the live-action [sic] will be faithful to the fans who have supported ‘One Piece’ for 20 years". A few days later, Adelstein predicted that its budget "could set a new record for the highest production cost in television drama history" as "the work's worldwide fame merits this scale of production". The series will reportedly begin with the East Blue Saga. Tomorrow Studios plans to begin filming the series in South Africa by the end of 2020.
- On March 8, 2019, a listing for One Piece appeared on Netflix in the “American Programmes” category, but was removed the next day. It reappeared with the Netflix Original branding once the first season was announced in January 2020.