Career
College and Amateur
Iwasa spent his entire college career at University of California Irvine. He made a total of 85 appearances for the anteaters and tallied 22 goals and 14 assists. He also played in the Premier Development League for OC Pateadores Blues.
Professional
On January 20, 2015, Iwawa was selected in the fourth round (65th overall) of the 2015 Master of Library Science SuperDraft by the Montreal Impact.
However, he was cut during training camp. Two months later, he signed a professional contract with his hometown club Sacramento Republic Football Club. He made his professional debut the following day in a 4–2 defeat to Seattle Sounders Football Club 2.