Claim: 2015 in manga had only ten mangas come out, one of which was One Piece with 14,102,521 copies.
Evidence: 1 One Piece 14,102,521 2 The Seven Deadly Sins 3 Attack on Titan 4 Assassination Classroom 5 Kingdom 6 Haikyu!! 7 Food Wars: Shokugeki no Soma 8 Terra Formars 9 Prison School 10 Tokyo Ghoul:re