After graduating from Iolani, Hamada earned a teaching degree from
Emporia State University, returning to Iolani to teach and coach in 1959. The following year he became head football coach, and in 1963 he became the school's athletic director. Under Hamada's coaching, Iolani won three
ILH football championships, in 1968, 1972, and 1980. In 1988, Hamada retired from coaching. Three years later, in 1991, he retired as athletic director. That same year, Iolani named its athletic field after him. ==Awards and honors==