Moriyama was born in Gifu on May 1, 1969. After graduating from Juntendo University, he joined J1 League club Nagoya Grampus Eight in 1992. The club won the champions at 1995 Emperor's Cup. In Asia, the club won the 2nd place at 1996–97 Asian Cup Winners' Cup. From the late 1990s, he moved to many clubs on loan, Bellmare Hiratsuka (1998), HIT Gorica (1998-99), Sanfrecce Hiroshima (1999), Kawasaki Frontale (2000) and Consadole Sapporo (2002-03). 