Kei YamaguchiKei Yamaguchi is a former Japanese football player.𝕏 kei_yamaguchi_Club careerYamaguchi was born in Joyo on June 11, 1983. He joined Nagoya Grampus Eight from youth team in 2002. He played many matches as defensive midfielder from first season. He became a regular player in 2006. He moved to JEF United Chiba in 2010. Although he played many matches, his opportunity to play decreased from 2012. He retired end of 2014 season.National team careerIn November 2003, Yamaguchi was selected Japan U-20 national team for 2003 World Youth Championship. At this tournament, he played 1 match.