https://www.animenewsnetwork.com/news/2010-11-30/top-selling-manga-in-japan-by-volume/2010-part-1
Top-Selling Manga in Japan by Volume: 2010 (Part 1) - News - Anime News Network
One Piece takes top 5 spots; Fullmetal Alchemist, Nodame, Naruto in top 10
top selling manga
https://www.animenewsnetwork.com/news/2013-12-01/top-selling-manga-in-japan-by-series/2013
Top-Selling Manga in Japan by Series: 2013 - News - Anime News Network
One Piece leads with 18 million, followed by Attack on Titan, Kuroko's Basketball, Magi, Naruto
top selling mangaby series2013 newsjapan