Japanese footballer and manager
 is a former Japanese football player and manager, He is the currently assistant manager of J2 League side Tochigi SC. 
Playing career.
Nagashima was born in Kanagawa Prefecture on March 22, 1967. After graduating from Nihon University, he played for Fujita Industries from 1989 to 1991.
Coaching career.
After playing for two seasons with Fujita Industries, Nagashima became a manager. He spent two seasons with Otsuka Pharmaceutical (later "Tokushima Vortis") U-15, then he moved back to Tokyo, where he was assigned first to U-15, then U-18: under his guidance, many players had their debut with FC Tokyo.
Nagashima then worked with Montedio Yamagata before coming back to Tokushima Vortis, where he inherited Shinji Kobayashi's job in 2016 after having been his second for three seasons. He resigned end of 2016 season.
References.
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