Hanyu was born in Chiba on December 22, 1979. After graduating from University of Tsukuba, he joined his local club JEF United Ichihara (later "JEF United Chiba") in 2002. He immediately broke into the first team and played in the opening league match against Kyoto Purple Sanga on March 3, 2002. He eventually played 22 games and scored 2 goals in his first professional season. He played many matches as offensive midfielder from first season. The club won the champions 2005 and 2006 J.League Cup. He moved to FC Tokyo in 2008. The club won 2009 J.League Cup. The club was relegated to J2 League end of 2010 season. In 2011, the club won the champions J2 League and Emperor's Cup. His opportunity to play decreased for injury from 2012 and he moved to Ventforet Kofu on loan in 2013. He returned to FC Tokyo in 2014. He moved to his first club JEF United Chiba in 2017. He played the club for the first time in 10 years and retired end of the 2017 season.