Education
He was educated at and played for Yokkaichi Chūō Industrial High School and Fukuoka University.
坪井 慶介
He was educated at and played for Yokkaichi Chūō Industrial High School and Fukuoka University.
He is a centre back and currently plays for the J-league team Shonan Bellmare. After graduating from the university in 2002, he joined Urawa Red Diamonds and immediately broke into the first team His first appearance came on 3 March 2002 against Yokohama F. Marinos.
He scored his first league goal on 17 May 2003 against Gamba Osaka.
Japan"s national coach Zico gave him the first cap in 2003 when he played Tsuboi on 11 June 2003 in a friendly against Paraguay at Saitama Stadium. In Japan"s first match against Australia, he suffered from cramps in his both thighs and had to be replaced by Teruyuki Moniwa in the 56th minute.
He was also in the squad for 2007 AFC Asian Cup but did not play any game in the tournament as Yuki Abe and Yuji Nakazawa were the first-choice centre backs. On 8 February 2008 he announced retirement from international football.