Nakaoka was born in Amagasaki on February 15, 1985. In 1997, she was 12 years old, she debuted in Nadeshiko League at Takarazuka Bunnys. While she was a Honjo Daiichi High School student, she left the league. After graduating from high school, she joined Tasaki Perule FC in 2003. However, the club was disbanded in 2008 due to financial strain. She moved to Speranza FC Takatsuki. In 2012, she moved to Albirex Niigata and retired end of season.