Kentaro Sakai (栄井 健太郎, Sakai Kentaro, born May 19, 1975) is a former Japanese football player.
After graduating from Kansai University, he joined his local club Avispa Fukuoka in 1998.
He played many matches as defensive midfielder in first season.
However his opportunity to play decreased in 1999 and retired end of 1999 season.
This biographical article related to a Japanese association football midfielder born in the 1970s is a stub.