No doubt Koyoharu Gotōge’s dark fantasy adventure series Demon Slayer: Kimetsu no Yaiba has become a smash hit. The series has overtaken Bleach in sales by the 17th volume, selling more than 20 million copies by November. Bleach achieved 18 million copies its 17th volume in 2005. Naruto had sold 24 million copies in 2003 and One Piece, the top selling manga, is nearly untouchable.
Shueisha confirmed today that a combined print run of Aya Yajima’s two novel books inspired by Koyoharu Gotouge’s Demon Slayer: Kimetsu no Yaiba dark fantasy manga series, “Shiawase no Hana” (Flower of Happiness) and “Katahane no Cho” (One-Winged Butterfly), will reach 700,000 copies by additional printing on December 10, which is the fastest pace in the publisher’s JUMP j BOOKS label.
The reason for the surge in sales is due to fans who are looking for a break from the seriousness of the main story.
Source: Shueisha Press Release