Biography
There are at least 3 artists known as Mayu:
1) 真優, a Japanese electronica singer, full name Mayu Kawata.
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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.
Biography text from Last.fm, available under CC BY-SA.