Keiki Kobayashi (????) is a Japanese composer and probably most famous for his music he has written for the Ace Combat Series, made by Namco Bandai. His works for Ace Combat first appeared on Ace Combat 04: Shattered Skies. Including Ace Combat Zero. (Ace Combat Zero: The Belkan War was made after Ace Combat 5: The Unsung War as a back story.) His latest works for the Ace Combat Series is from Ace Combat: Assault Horizon, where he was not only the sound director, but also a composer a few tracks like "Rebirth," "Horizon," "Release," "Infiltrator," "Deja vu," "His Repose," & "Refrain.
Other composers such as, Tetsukazu Nakanishi Hiroshi Okubo, and Rio Hamamoto also took part in making the soundtrack.