Started playing the piano at the age of 2. At the age of 4, she sang “Nausicaa Requiem” in the movie “Nausicaa of the Valley of the Wind”.

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From the age of 6, he has been a member of NHK Tokyo Children's Chorus.

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In 2005,she began her solo career in earnest with the theme song for the Korean movie "Welcome to Tongmakkol.

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She also wrote the lyrics for the song “I will be” for the Nissan Skyline commercial in 2007.

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In 2008, she sang “Himawari no ie no rondo” for Hayao Miyazaki's “Ponyo on the Cliff,” which was included in his image album. Also, DAISHI DANCE's “the Ghibli set” released in the same year included “Kimi no ono set” sung by Mai.

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She sang the opening theme song for the movie “Harry Potter and the Deathly Hallows Part 2,” which was released worldwide in July 2011, and “Stand Alone,” the theme song for the third part of the NHK special drama “Clouds Over the Hill” in December of the same year.

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She has also written lyrics for Disney movies, including “Once Upon a Dream” for the Japanese version of “Maleficent” and “Cinderella” end song “Yume wa Hisokani (Duet version)” for the Japanese version of “Cinderella”.

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She is the Music Goodwill Ambassador of Nakano City, Nagano Prefecture. In 1996, she formed and leads a women’s chorus “Little Carols, She participated as a soloist in the “Joe Hisaishi Symphonic Concert: Music from the Films of Hayao Miyazaki” world tour that began in Paris in 2017. In 2022, she performed at Radio City Concert Hall in New York and in Seattle.