Kenji Eno was a Japanese musician and video game designer. He gained a reputation as a maverick during the mid-1990s for creating unorthodox games like Real Sound and is perhaps best remembered today for his rebellious marketing techniques. Outside of his homeland he was best known for his survival horror video games, D and Enemy Zero. Apart from creating video games, Eno was also a well-regarded electronic musician and he created the scores for several of his games. Eno founded the video game development companies EIM, Warp, and From Yellow to Orange. He also worked in a variety of fields apart from video games and music including the automotive, cellphone, tobacco, and hotel industries. Eno died on February 20, 2013, due to heart failure brought on by hypertension.

Real Sound: Kaze no Regret, is an adventure audio game developed and published by Warp. The game was first released for the Saturn in July 1997, and later for the Dreamcast in March 1999. Real Sound was intended to provide equal access to sighted and blind players. The subtitle Kaze no Regret means "The wind's regret" or "The Wind(s) of Regret".