When was the first volume of Monster?
Monster (manga)
30 June 1995
Written and illustrated by Naoki Urasawa, Monster was published in Big Comic Original from December 1994 to December 2001. The 162 chapters were periodically collected into 18 tankōbon volumes published by Shogakukan, the first on 30 June 1995 and the last on 28 February 2002. While writing Monster, Urasawa began the series 20th Century Boys in 1999, which would continue after Monster had finished. Monster received a nine-volume kanzenban re-release between 30 January and 29 August 2008.[2][3]