After retirement, Ikeya became a coach at Hitachi (later Kashiwa Reysol) from 1992. In 2004, he became a manager. However, in July, he was sacked and he left the club. In 2005, he signed with Roasso Kumamoto and managed until 2008. In 2012, he became a Chairman at the club. He also managed in 2013 and 2017. In 2017 season, the club finished at the 21st place of 22 clubs and he resigned as a manager and left the club end of the season.