From Wikipedia entry:
Rumiko Takahashi (高橋 留美子 Takahashi Rumiko, born October 10, 1957) is a Japanese manga artist.
Takahashi is one of the wealthiest individuals, and the most affluent manga artists in Japan. The manga she creates (and its anime adaptations) are popular worldwide, where they have been translated into a variety of languages. Takahashi is also the best selling female comics artist in history; as of February 2010, over 170 million copies of her various works had been sold. She has twice won the Shogakukan Manga Award: once in 1980 for Urusei Yatsura, and again in 2001 for InuYasha.
Source: Wikipedia, "Rumiko Takahashi", available under the CC-BY-SA License.