Tsunami was born in Setagaya, Tokyo on August 14, 1961. He joined Yomiuri (later "Verdy Kawasaki") from their youth team in 1980. The club won the champions in Japan Soccer League 5 times, JSL Cup 3 times and Emperor's Cup 3 times. This was golden era in club history. He was also selected Best Eleven 3 times (1982, 1983 and 1984). In 1992, Japan Soccer League was folded and founded new league J1 League. However he lost opportunity to play after that. Toward the end of his career, he played for Avispa Fukuoka (1996–1997) and Bellmare Hiratsuka (1997–1998). He retired in 1998. He played 267 games and scored 5 goals in the league.