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 utai – traditional Noh recitation – 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.
She has performed with ensembles and orchestras including the Royal Concertgebouw Orchestra, the Orchestra of the Maggio Musicale Fiorentino, the Ensemble Intercontemporain, the Ensemble Musikfabrik, the Remix Ensemble, the Munich Chamber Orchestra, the Arditti Quartet, the Quatour Diotima and the Hiroshima Symphony Orchestra.