Kobayashi was born in São Paulo, Brazil on November 29, 1947. He moved to Japan and joined Japan Soccer League club Yanmar Diesel in 1971. The club won the league champions in 1971, 1974 and 1975. The club also won 1974 Emperor's Cup. He retired in 1976. He played 92 games and scored 7 goals in the league. He was selected Best Eleven in 1974 and 1975.