Eiichiro Oda's popular manga "One Piece" was recognised in Guinness World Records for "the most copies published for the same comic book series by one author."
Guinness handed an official certificate form to Yoshihisa Heishi, editor in chief of Weekly Shonen Jump. Heishi attended the ceremony in place of the author at Tokyo Tower in Minato Ward on Monday.
The number of copies of the comic book printed worldwide was 320,866,000 as of the end of December 2014.
According to Shueisha Inc., the publisher of the manga, "One Piece" started its series in the weekly magazine in 1997. Seventy-seven volumes of the comic book have been released.
The manga is read in more than 35 countries and regions.
Oda released a comment at the ceremony reading, "The numerical record tells me that the manga can connect many people. I'll continue creating pieces that will live up to this record."