[1] Joo has joined the Daekyo team when she was in the junior group age.

She was part of the Korean girls' team that competed at the 1999 and 2000 Asian Junior Championships, winning the bronze and silver medal respectively.

[2][3] She also won the bronze medal in the girls' doubles event in both competitions.

[3][4] Joo later helped the national junior mixed team won the silver medal at the 2000 World Junior Championships in Guangzhou, China.

This biographical article relating to a South Korean badminton figure is a stub.