Biography
Ranma is the name of more than one artist:
1) Italian trance
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2) hip-hop
It may also be the case of an incorrect artist tag for an anime soundtrack. If so please update your tags. The assorted theme songs are composed by a slew of cutesy J-pop bands. Most notable is DoCo, a play on the original band CoCo. They're usually drawn as the main girlie characters of Ranma: Shampoo, Akane, Girlie Ranma, and sometimes the other Tendou sisters.
Biography text from Last.fm, available under CC BY-SA.