Ryoko Aoki holds a unique position in the field of Noh theatre as a female singer and performer. She has performed in several traditional Noh plays, historically the reserve of male actors. Above all, she is the pioneer of and inspiration for a new artistic form combining Noh with contemporary music. More than 50 works have been written for her by various composers including Peter Eötvös, Toshio Hosokawa, Stefano Gervasoni, José María Sánchez-Verdú and Oliver Schneller.
The singer and performer has made appearances in Tokyo, Kyoto, Long Beach, Paris, Rome, London, Dublin, Bilbao, Budapest, Berlin, Munich, Cologne and Karlsruhe among others, and at festivals including the Asia-Pacific Weeks Berlin, Bartok Festival Szombathely, Xenakis Festival in New York and the Takefu International Music Festival. She has performed with ensembles and orchestras including the Royal Concertgebouw Orchestra, the Arditti Quartet, the Quatour Diotima and the Munich Chamber Orchestra.