Japan's Best Selling Manga of 2015!
Top 10 Best Selling Manga Series 2015
1 – One Piece (14,102,521 copies). 2 – Nanatsu no Taizai (10,304,112 copies). 3 – Shingeki no Kyojin (8,778,048 copies). 4 – Assasination Classroom (8,605,861 copies). 5 – Kingdom (8,569,215 copies). 6 – Haikyû!! (6,531,508 copies). 7 – Shokugeki no Souma (4,321,830 copies). 8 – Terra Formars (4,188,158 copies). 9 – Prison School (4,058,119 copies). 10 – Tokyo Ghoul:re (3,758,541 copies).
Top 10 Highest Selling Manga Volumes 2015
1 – One Piece 76 (3,185,018 copies) 2 – One Piece 77 (3,020,137 copies) 3 – One Piece 78 (2,977,466 copies) 4 – One Piece 79 (2,810,583 copies) 5 – Shingeki no Kyojin 15 (2,000,137) copies) 6 – Shingeki no Kyojin 16 (1,920,780 copies) 7 – Shingeki no Kyojin 17 (1,807,155 copies) 8 – Naruto 72 (1,324,693 copies) 9 – Tokyo Ghoul:re 01 (1,017,871 copies) 10 – Assassination Classroom 12 (1,012,500 copies)
Source: http://opforum.net/threads/top-selling-manga-2015-in-japan.25031/