The chapters of the Japanese manga series Eyeshield 21 were written by Riichiro Inagaki and illustrated by Yusuke Murata and serialized in Weekly Shōnen Jump. Shueisha then collected the 333 chapters into 37 tankōbon volumes. Chapters are called Downs in Eyeshield 21 for the reason that the manga focuses on high school American football. Two unnamed pilot chapters released before started the manga. The English publisher is Viz Media. They published the new volumes every two months under the Shonen Jump Advanced title. __TOC__