 During one trip to Zurich in 1998, Mizuguchi witnessed a music festival in which he observed how people were moving toward the music and how the music, sounds, colors, and dancing would change accordingly.Mizuguchi recognized what he observed as synesthesia and decided to focus on rhythm-based music games where he created "Space Channel 5", "", and "Rez".Both "Space Channel 5" and "Rez" are referenced in modern gaming media as essential and influential to the development of the modern wave of music-rhythm games, with Harmonix Music Systems co-founder, Alex Rigopulos citing Mizuguchi as an influence in Harmonix's history.