ACO is a Japanese singer specializing in a wide range of genres, including pop, downtempo, jazz, trip-hop, and electronica. She was born in Aichi Prefecture in 1977, and she released her breakthrough single Fuan Nano (不安なの) in 1995. The song, done in a summery pop style, was a moderate success and her debut album, Kittenish Love followed soon after in early 1996. By the end of the year, ACO was back in the studio recording her second album, NUDE, which was released exactly a year after her debut.

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