Nakazawa was born in Yoshikawa on February 25, 1978. After graduating from Misato Technical High School, he moved to Brazil in 1996. In 1998, he returned to Japan and signed with J1 League club Verdy Kawasaki (later "Tokyo Verdy") as a trainee. He signed professional contract in 1999. In 1999, he became a regular center back and was selected "Rookie of the Year award" and Best Eleven. In 2002, he moved to Yokohama F. Marinos. The club won the champions in the 2003 and 2004 J1 League. He was also selected "MVP award" and "Japanese Footballer of the Year" in 2004 season. He played as regular center back for long time. He retired end of the 2018 season at the age of 40.