After graduating and earning a doctorate with highest honors at the Tokyo National University of Fine Arts and Music, Yasko Sato completed her training in Italy with Raina Kabaivanska. She was awarded prizes in several international competitions including the XLI “Toti Dal Monte” Competition for the role of Cio-Cio-San (Madama Butterfly), the IX Concurso Internacional de Cant “Jaume Aragall” (1st prize and special prize Amics de l’opera de Sabadell), the Music Competition of Japan in Tokyo (1st prize and Audience Award). She made her début in 2005 in Japan singing Leonora in Oberto Conte di San Bonifacio by Verdi while on tour for the Teatro Lirico Sperimentale di Spoleto; the same theatre subsequently invited her to sing Mimì in La Bohème, Leonora in Il Trovatore and for a concert with Leo Nucci in the 40th anniversary of his début. She later appeared as Donna Elvira in Don Giovanni at the Tokyo National Theatre, as Fiordiligi in Così fan tutte, and as Mimì in La Bohème; she also performed the latter role at the Teatro Vittorio Emanuele of Messina. She deepened her knowledge of the role of Cio-Cio San in Madama Butterfly publishing in Japan a work entitled “Madama Butterfly: evolution of a woman”; analyzing the evolution of the character in the different revisions of the work, she investigates the composer’s ultimate intentions. With her début in the title role of Madama Butterfly in Sabadell she obtained great success and vast appreciation of the critics, accompanied by enthusiastic reviews in major Spanish newspapers. She later had the opportunity to sing the same role at the Teatro del Maggio Musicale Fiorentino in Florence, Teatro Regio in Parma, Teatro Petruzzelli in Bari, Tokyo National Theatre, Theatre Megaron in Athens, Slovene National Theatre in Ljubljana, Teatro Pergolesi in Jesi, Teatro Verdi in Brindisi, Teatro Sociale in Rovigo, and Teatro Mario Del Monaco in Treviso. In 2016 she made her début in the title role of Tosca at the Tokyo Bunka Kaikan. Future engagements include Madama Butterfly at Seattle Opera, Tosca in Kanagawa, Pagliacci.