Emerging as a phenomenon in the end of 2015, anime series of Attack on Titan collect many successes beyond imagination. Then, the work keeps being reprinted and surpasses output volumes of One Piece in 2013 and 2014.
Tokyo Ghoul: Re, a subsequent episode of Tokyo Ghoul, is making gradually strong impression on readers in Japan. To be set up on the basis of a fictional plot, spooky and horror details about ghouls, Tokyo Ghoul: Re is monopolizing manga market step by step with more than 1 million output volumes of the first episode.
In spite of without high evaluations in comparison with One Piece, Assassination Classroom with story of a monstrous alien teacher always becomes irreplaceable to readers.
To explain sudden increase of selling sales of nearly 1 million volumes for Assassination Classroom episode 13, it is suggested that thanks to termination of Naruto, a large number of fan turns to invest their money in possessing other favorable manga series.