The first 129 chapters were redistributed between volumes 1 through 20 so that each volume better followed story arcs; after this reordering, the English release had 19 volumes. The fourth volume was released on October 15, 1997; volume 19, which Dark Horse numbered "19/20" and which ended on the same chapter as the Japanese volume 20, was released on January 19, 2005. After this release, they began republishing the first 20 volumes, this time following the Japanese chapter layout and using a new translation; they also continued publishing volumes from 21 on, these also followed the original Japanese chapter layout.