Omura was born in Matsue, Japan on September 6, 1969. After graduating from Juntendo University, he joined Yokohama Marinos (later "Yokohama F. Marinos") in 1992. In the 1990s, he played center-back with Japan national team player Masami Ihara. The club won the champions 1992 Emperor's Cup. In Asia, the club won the 1992–93 Asian Cup Winners' Cup. In 1995, the club won the J1 League. In 2000s, the club won second place at the 2000 J1 League and the champions at the 2001 J.League Cup. He moved to Vegalta Sendai in 2002 and Sanfrecce Hiroshima in 2004. In 2006, his opportunity to play decreased and he moved to J2 League club Yokohama FC in August 2006. In 2008, he moved to Japan Football League club Gainare Tottori. He retired end of 2008 season.