Watase Yuu (born March 5, 1970 in Osaka) is a Japanese shoujo manga artist. She received the Shogakukan Manga Award for shoujo for Ceres, Celestial Legend in 1997. Since writing her debut short story "Pajama de Ojama" ("An Intrusion in Pajamas"), Watase has created more than 80 compiled volumes of short stories and continuing series. In October 2008, Watase began her first shōnen serialization, Arata: The Legend in Weekly Shounen Sunday.