There Are At Least 3 Artists Known As Mayu 1 真優 A Japanese Electronica Singer Full Name Mayu Kawata. 2 An American Born Singer/songwriter Who Writes Songs In Both English And Japanese. 3 MAYU A Japanese VOCALOID Developed And Distributed By EXIT TUNES Released In December 2012 For The VOCALOID3 Engine. Her Voice Provider Has Never Been Revealed.