Dorohedoro is a Japanese manga series written and illustrated by Q Hayashida. It tells the story of the amnesiac reptilian-headed Caiman, working together with his friend Nikaido to recover his memories and survive in a strange and violent world. The manga was first serialized in Shogakukan's seinen magazine Monthly Ikki from November 2000 until September 2014, when the magazine ceased publication. It was then serialized in Hibana from March 2015 to August 2017, when Hibana ceased publication as well. Dorohedoro was then transferred to Monthly Shōnen Sunday in November 2017 and finished in September 2018. Shogakukan collected its chapters in 23 tankōbon volumes.