In 1983, Jo left SNU in order to study at the Conservatorio Santa Cecilia in Rome. Among her teachers were Carlo Bergonzi and Giannella Borelli. While Jo studied in Italy, she was frequently heard in concert in Italian cities and on national radio broadcasts and telecasts. It was during this time when Jo began to use "Sumi" as her stage name in order to make her name more friendly to European language speakers who often found it difficult to pronounce Su-gyeong. She graduated in 1985 with concentrations in keyboard and voice.