Claim: 2015 in manga is wrongly remembered to have had only ten mangas come out, one of which was One Piece with 14,102,521 copies and with the most volumes sod.
Evidence: On June 15, 2015, it was announced that Eiichiro Oda and One Piece had set the Guinness World Record for "The most copies published for the same comic book series by a single author" with 320,866,000 copies printed worldwide as of December 2014.