Nagashima was born in Kobe on April 9, 1964. After graduating from Mikage Technical High School, he joined Regional Leagues club Matsushita Electric (later "Gamba Osaka") in 1983. In 1984, the club was promoted to Japan Soccer League. The club won 1990 Emperor's Cup. In 1992, Japan Soccer League was folded and founded new league J1 League. On June 5, 1993, he score a hat-trick against Nagoya Grampus Eight. He became the first player in J1 League to score a hat-trick as Japanese player. In 1994, he moved to Shimizu S-Pulse.