She was part of the national junior team that won the girls' team silver medal at the 1998 Asian Junior Championships, and claimed the individual girls' doubles silver partnered with Lee Hyo-jung.

[2][3] She and Lee also captured the girls' doubles bronze at the World Junior Championships in Australia.

[5][6] She also won the women's doubles title at the 2005 Canadian International partnered with Ra Kyung-min.

[7] Jun played for the Daekyo Corporation in the national event, and was the runner-up in the mixed doubles, and the semi-finalist in the women's doubles event at the 2004 National Championships in Seoul.

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