Nonaka, originally from Woodbridge, Virginia, began shooting at age 3 and attended the U.S. Shooting Academy when she was 12, after which she became a competitive shooter. In 2011, a 15-year-old Nonaka was joining the Team Glock Shooting Squad. Since, she has competed in various disciplines including USPSA, SSCA, IPSC, IDPA, Bianchi and GSSF. In October, 2011, Nonaka was a member of the gold medal winning USA Ladies Standard Team at the IPSC World Shoot XVI in Rhodes, Greece.