Sakai was born in Nagareyama on August 2, 1975. He joined his local club Kashiwa Reysol from their youth team in 1994. He played many matches as right midfielder. The club won the champions at 1999 J.League Cup. From 2000, his opportunity to play decreased behind Mitsuteru Watanabe. He moved to Consadole Sapporo in 2002. He retired end of 2003 season.