The people who heard rotary engines for the first time on the race tracks of Europe, probably thought they sounded ugly. However, just twenty years after its racetrack debut, the racing rotary engine had evolved from a two- to four-rotor unit, emanating a sound as sweet as music. At the time, there were numerous people contributing to the development of Mazda racing cars, and who participated from behind the scenes. The following contents reports on those people who made significant contributions to Mazda Motorsports.