Koshida was born in Kanazawa on October 19, 1960. After graduating from University of Tsukuba, he joined Japan Soccer League club Nissan Motors in 1983. The club won 1983 and 1985 Emperor's Cup. In 1988/89 season, although the club won 1988 JSL Cup and 1988 Emperor's Cup, he left the club later in the season. In 1990, he returned his local Kanazawa and joined Japanese Regional Leagues club Kanazawa SC. He retired in 1996.