lit. "Alchemical Weapons"The manga has been adapted into an anime television series, which was produced by Xebec and was broadcast on Japanese television network TV Tokyo from 2006 to 2007. In December 2007, the anime was announced for North American DVD release by Viz Media. In 2009, the series made its American television debut on the Funimation Channel, with American broadcast rights acquired by Funimation from Viz Media. The series has also spawned two drama CDs, two light novels, a PlayStation 2 video game, and many types of Buso Renkin-themed merchandise.
In Japan, the Buso Renkin manga has sold over 3 million volumes and was nominated for a Seiun Award. It received a mixed reception from manga and anime publications. Watsuki's art received the most positive comments from reviewers, while other aspects of the manga, such as its action and characters, have divided critics' opinions. The anime, which critics described as a generic shōnen fighting series, received a mostly negative reception.follows Kazuki Muto, who saves Tokiko Tsumura and is killed by an alchemical monster known as a homunculus. Tokiko, an alchemist warrior, feels responsible and revives him by replacing his destroyed heart with a kakugane (核鉄). The kakugane is an alchemical device which, when activated, takes a weapon form based on its user's personality, forming a buso renkin—the only thing that can destroy a homunculus. Kazuki creates his own buso renkin and joins Tokiko in the fight against the homunculi and their master, Koushaku Chouno. Chouno, who has renamed himself "Papillon", is killed by Kazuki, but is later resurrected by the L.X.E., a humanoid homunculi group led by Chouno's great-great-grandfather Bakushaku Chouno, now calling himself Dr. Butterfly. In various battles, Kazuki, Tokiko and Captain Bravo (their team leader) destroy most of the L.X.E.'s members. After learning that Dr. Butterfly believes him to be weak and useless, Papillon rebels against the L.X.E. and kills Dr. But