In America, the manga is translated and published by Dark Horse Comics, which has released 37 volumes so far, the first of which was published in October 22, 2003. As with other Dark Horse manga releases such as Hellsing or Trigun Maximum, the Japanese reading format (from right to left) is preserved in the English release. Moreover, the sound effects are left untranslated in the earlier releases, but are translated in later books starting from volume 12. The company has also started incorporating references to fantasy films, such as Army of Darkness and Lord of the Rings, into the dialogue. However, the content in general remains untouched.