別冊少年マガジン
"Animal Land", written and illustrated by Makoto Raiku, was first published in Kodansha's "Weekly Shōnen Magazine" on September 9, 2009 as a one-shot titled "Episode 0". It served as a prologue to the regular serialization that was done in "Bessatsu Shōnen Magazine" from October 9, 2009 to February 9, 2014. Kodansha compiled its chapters into fourteen "tankōbon" (collected volumes) and released them from March 17, 2010 to March 7, 2014. Additionally, 28 authors wrote a "yonkoma" version of "Animal Land" for "Bessatsu Shōnen Magazine"s six-month anniversary, and two one-shots were also published in "Weekly Shōnen Magazine" on March 17, and August 18, 2010.