It's taking One Piece 4 weeks to even get close to 2 million in the rankings.
Don't get me wrong, 2 million is not bad by any means, and One Piece still blows the competition away and then some, but in comparison to past volumes, it's kinda sad to see the manga's sales in decline.
(I'm sure people switching more to digital has something to do with it. Especially considering manga in general seems to be in decline in favor of buying the volumes digitally now.) but even so, it just kinda makes me a bit worried for physical releases in the future.