Saotome Ranma and his father, Genma, fell into cursed springs during a journey to China. As a result, whenever Ranma comes into contact with cold water, he turns into a girl; when the same thing happens to Genma, he becomes a panda. Wheneven that happens, they stay in their alternative form until the process is reversed by hot water. And if that wasn't bad enough, Ranma has a bigger problem to deal with: his father and Tendou Souun decide to marry Ranma to the youngest daughter of the Tendou household, Akane, so that the two can eventually take over her family's dojo. Meanwhile, the youngsters are less than thrilled about this forced engagement...

Note: Ranma 1/2 was canceled due to poor ratings, and was taken off the air to be retooled. It was relaunched as Ranma 1/2 Nettou Hen with some changes in staff. Furthermore, the US release shuffled the episodes around to bring it more in line with the manga.
Note 2: The aired timeline differs from the timeline that was originally intended for this and Ranma 1/2 Nettou Hen. The intended order for the episodes to be viewed is: Ranma 1/2 1-13, Ranma 1/2 Nettou Hen 7-9, Ranma 1/2 14-18, Ranma 1/2 Nettou Hen 1-6, Ranma 1/2 Nettou Hen 10-End

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Sequel: Ranma 1/2 Nettou Hen
Other: It's a Rumic World: 50th Anniversary Weekly-Shonen Sunday