Mayu Watanabe (渡辺 麻友, Watanabe Mayu, born March 26, 1994) is a Japanese former idol, singer, actress, and former member of the Japanese idol girl group AKB48 under Team B. In the annual AKB48 General Elections event, she had consistently been voted by fans to rank among the group's top members. She has released five solo singles, many of which have peaked in the top ten in the Oricon charts, and one solo album. She left the group on the last day of 2017 and on the first day of 2018 and pursued as an acting career until her retirement from the entertainment industry in June 2020.