Ishii was born in Fukuyama on March 13, 1939. After graduating from Fukuyama Iyo High School, he joined his local club Toyo Industries in 1957. In 1965, Toyo Industries joined new league Japan Soccer League. The club won the league champions for 3 years in a row (1965-1967) and Emperor's Cup 2 times (1965 and 1967). He played 28 games in the league until 1967. In 1968, he moved to new club Towa Real Estate (later "Fujita Industries"). The club was promoted to Japan Soccer League in 1972. He retired in 1975.