Morioka was born in Yokohama on October 7, 1975. After graduating from Toin Gakuen High School, he joined Kashima Antlers in 1994. He moved to Shimizu S-Pulse in August 1995. He played many matches as center back. The club won 1996 J.League Cup and 2001 J1 League. In Asia, the club won the champions 1999–00 Asian Cup Winners' Cup and the 3rd place 2000–01 Asian Cup Winners' Cup. However his opportunity to play decreased from 2005. He moved to J2 League club Kyoto Sanga FC in 2007. He played as captain and the club was promoted to J1 League in 2007. He retired end of 2008 season.