古河電気工業
Miyamoto was born in Hitachi on July 4, 1938. After graduating from Waseda University, he joined Furukawa Electric in 1961. He won 1961 and 1964 Emperor's Cup. In 1965, Furukawa Electric joined new league Japan Soccer League. He retired in 1974. He played 103 games and scored 19 goals in the league. He was selected Best Eleven in 1966, 1967 and 1968.