Claymore (Japanese: クレイモア Hepburn: Kureimoa) is a Japanese dark fantasy manga series written and illustrated by Norihiro Yagi. It premiered in the May 2001 issue of Monthly Shōnen Jump, where it continued until the magazine was shut down in June 2007. At which point the series was temporarily moved to Weekly Shōnen Jump, until transferring to the newly launched Jump Square in November 2007, where it continued until its conclusion in December 2014. The individual chapters were collected into 27 tankōbon volumes by Shueisha between January 2002 and December 2014. Two pieces of theme music are used for the episodes: one opening theme and one ending theme. The opening theme is “Raison d’être” (レゾンデートル?, lit. Reason for being) by Nightmare. The ending theme is J-pop singer Riyu Kosaka’s single, “Danzai no Hana~Guilty Sky” (断罪の花 ~Guilty Sky~?, lit. Flower of Conviction~Guilty Sky). A single for “Danzai no Hana~Guilty Sky” was released on May 30, 2007, and the single for “Raison d’être” was released on June 6, 2007.