
Ranma ½ (Japanese: らんま 1/2 Hepburn: Ranma Nibun-no-Ichi?, pronounced Ranma One-Half) is a Japanese manga series written and illustrated by Rumiko Takahashi. It was serialized in Weekly Shōnen Sunday from September 1987 to March 1996, with the chapters collected into 38 tankōbon volumes by Shogakukan. The story revolves around a teenage boy named Ranma Saotome who has trained in martial arts since early childhood. As a result of an accident during a training journey, he is cursed to become a girl when splashed with cold water, while hot water changes him back into a boy. Throughout the series Ranma seeks out a way to rid himself of his curse, while his friends, enemies and many fiancées constantly hinder and interfere.
Ranma ½ has a comedic formula and a sex-changing main character, who often willfully transforms into a girl to advance his goals. The series also contains many other characters, whose intricate relationships with each other, unusual characteristics, and eccentric personalities drive most of the stories. Although the characters and their relationships are complicated, they rarely change once they are firmly introduced and settled into the series.
The manga has been adapted into two anime series created by Studio Deen: Ranma ½ and Ranma ½ Nettōhen (らんま½ 熱闘編), which together were broadcast on Fuji Television from 1989 to 1992. In addition, they developed 12 original video animations and three films. In 2011, a live-action television special was produced and aired on Nippon Television. The manga and anime series were licensed by Viz Media for English-language releases in North America. Madman Entertainment released the manga, part of the anime series and the first two movies in Australasia, while MVM Films released the first two movies in the United Kingdom. The Ranma ½ manga has over 53 million copies in print in Japan. Both the manga and anime are cited as some of the first of their mediums to have become popular in the United States.
An anime television series was created by Studio Deen and aired weekly between April 15, 1989 and September 16, 1989 on Fuji TV for 18 episodes, before being canceled due to low ratings. The series was then reworked by most of the same staff, retitled Ranma ½ Nettōhen (らんま½ 熱闘編) and launched in a different time slot, running for 143 episodes from October 20, 1989 to September 25, 1992. The anime stays true to the original manga but does differ by keeping Ranma's sex transformation a secret from the high school students, at least throughout most of its length. It also does not introduce Hikaru Gosunkugi until very late in the series, instead, Sasuke Sarugakure, the diminutive ninja retainer of the Kuno family fills a number of Gosunkugi's roles in early storylines but is a major character in his own right. The anime also alters the placement of many story arcs and contains numerous original episodes and characters not adapted from the manga.
Viz Media licensed both anime series in 1993, making Ranma ½ one of the very first anime titles licensed by Viz. The English dub produced for the series was recorded by The Ocean Group in Vancouver, British Columbia. They released the series on VHS from their own Viz Video label, and on DVD a few years later in association with Pioneer Home Entertainment. Their releases collected both anime series as one, separated episodes into what they call "seasons", and changed the ordering of many of the episodes. Viz themselves re-released it on DVD in 2007 using their own DVD production company. At Otakon 2013, Viz announced that they re-acquired the TV series for Blu-ray and DVD release in 2014. The show is streamed on their anime channel service Neon Alley since Autumn 2013. Madman Entertainment licensed some of the series for release in Australasia, although their rights expired after releasing only the first four "seasons" as one series..