is a former Japanese football player.
Playing career
Iwai was born in Saitama Prefecture on January 31, 1967. After graduating from Tokai University, he joined All Nippon Airways (later Yokohama Flügels) in 1989. He became a regular player as center back for the first season. The club won the championship at the 1993 Emperor's Cup and 1994–95 Asian Cup Winners' Cup. In 1996, he moved to the newly promoted J1 League club, Avispa Fukuoka. He retired at the end of the 1998 season.