Ratman (ラットマン Rattoman) is a Japanese shōnen manga written and illustrated by Sekihiko Inui. The series follows the story of Shuto Katsuragi, a wanna be hero, who tries to save his friend, but ends up becoming the "villain" Ratman. Ratman was serialized in the Japanese magazine Shōnen Ace, published by Kadokawa Shoten from August 2007 to June 2013. Kadokawa Shoten compiled its chapters into twelve tankōbon bound volumes. Ratman was published in America by Tokyopop, but production ceased after volume 4.