Kusaki was born in Kyoto Prefecture on April 12, 1962. After graduating from Rakunan High School, he joined Japan Soccer League club Yanmar Diesel in 1981. The club won 1983 and 1984 JSL Cup. He played 156 matches and scored 33 goals for the club until 1992. He moved to Gamba Osaka in 1992. He moved to his local club Kyoto Purple Sanga in 1994. He retired in 1994.