Monster (モンスタ, Monsutā?), also known as Naoki Urasawa's Monster, is a seinen manga series written and illustrated by Naoki Urasawa, published by Shogakukan in Big Comic Original from December 5, 1994 to December 20, 2001, containing 162 chapters in 18 tankōbon volumes.
Urasawa later wrote and illustrated the novel Another Monster, a story detailing the events of the manga from an investigative reporter's point of view. It was published by Shogakukan in 2002.
