Kim Jae-sung (, born 3 October 1983) is a South Korean former professional footballer who played as a midfielder.
Kim previously played for Bucheon SK and Jeju United.
Kim graduated from the same Football Academy College as Park Ji-sung. He has said that he used to train with Ji Sung Park as a teenager at the college.
He has also had recent international duty call backs and was influential in the 3âÂÂ1 victory over Japan in the 2010 East Asian Football Championship.
On 9 January 2010, Kim made his first international cap for South Korea at the friendly match against Zambia.