Mori was born in Fukuyama on November 24, 1943. He played for Waseda University. He won 1963 and 1966 Emperor's Cup at the university. After graduating from Waseda University, he joined Mitsubishi Motors (later "Urawa Reds") in 1967. The club won Japan Soccer League champions in 1969 and 1973. The club also won 1971 and 1973 Emperor's Cup. He retired in 1977. He played 146 games and scored 28 goals in the league. He was selected Best Eleven 5 times.