A record for the manga Fire Force (Enen no Shouboutai). According to reports, the work has already surpassed 17 million copies in circulation.
Therefore, volume 31 will be released on October 15th of this year in Japan.
Synopsis:
Shinra Kusakabe is a sinister-looking boy with a dark past who generates fire from his feet and dreams of being a hero. He joins other firefighters who also have the power to control fire!
Finally, Fire Force is a Japanese manga series written and illustrated by Atsushi Ohkubo. Its chapters began serialization in the weekly magazine Weekly Shōnen Magazine on September 23, 2015.