Oenoki worked as a coach atShimizu S-Pulse in 2003 and he was the manager ofWaseda University between 2004 and 2007. Under his guidance, Waseda was promoted from the Tokyo Prefectural University League to the Kanto League Div 2 in 2004, and then to Div 1 in 2005. The club finished runners-up in the national intercollegiate championship in 2006. He acquired the S-Class coaching license that is a prerequisite to manage a J.League club in 2007. In 2008, he returned to Shimizu S-Pulse and became a manager for youth team. In July 2014, he became a manager for top team asAfshin Ghotbi successor. However the club performance is bad he resigned in July 2015.