Fukai was born in
Fujikawa, Yamanashi on September 13, 1980. After graduating from
Komazawa University, he joined the
J1 League club
Kashima Antlers in 2003. He played many matches every season. The Antlers won second place in
2003 and in the
2006 J.League Cup. In 2007, he moved to
Albirex Niigata. In 2008, he moved to
Nagoya Grampus. However he did not play much. In August 2008, he moved to
JEF United Chiba. He played many matches as forward with
Seiichiro Maki who was a teammate at
Komazawa University. However JEF United finished in last place in the
2009 season and was relegated to the
J2 League for the first time in the club's history. Although he played often in 2012, he could not play much in 2013 due to an injury. He resigned at the end of the 2013 season. In July 2014, he joined the J2 club
V-Varen Nagasaki and played two seasons. In 2016, he moved to the
J3 League club
SC Sagamihara and played many matches. He retired at the end of the 2016 season. ==Club statistics==