Kuwata was born in Hiroshima on June 26, 1941. After graduating from Waseda University, he joined his local club Toyo Industries in 1965. The club won Japan Soccer League champions for 4 years in a row (1965-1968). The club also won 1965, 1967 and 1969 Emperor's Cup. He retired in 1969. He played 62 games and scored 34 goals in the league. He was selected Best Eleven in 1966 and 1967.