Morishima was born in Hiroshima on April 30, 1972. After graduating from Tokai University Daiichi High School, he joined Japan Soccer League club Yanmar Diesel (later "Cerezo Osaka") in 1991. In 1992, Japan Soccer League was folded and the club joined new league Japan Football League. The club won the champions in 1994 and was promoted to J1 League. The club won the 2nd place at 2001 and 2003 Emperor's Cup. His opportunity to play decreased from 2007 and he retired end of 2008 season. He played 456 games and scored 140 goals for the club.