[2] She is a member of Acrepa Sao Bernardo Sports Club, and is coached and trained by Mauricio Kobayashi.
[1] Nonaka made her official debut, as a 16-year-old, at the 2004 Summer Olympics in Athens, where she competed only in the women's doubles.
Playing with her partner Lígia Silva, Nonaka received a bye for the first round, before losing out to the Czech duo, Renáta Štrbíková and Alena Vachovcová, with a set score of 2–4.
[6][7] Four years after competing in her first Olympics, Nonaka qualified for her second Brazilian team, as a 20-year-old and a lone female table tennis player, at the 2008 Summer Olympics in Beijing, by receiving a spot from the Latin American Qualification Tournament in Santo Domingo, Dominican Republic.
[8] She lost the preliminary round match of the women's singles to Lithuania's Rūta Paškauskienė, with a unanimous set score of 0–4.