 The musical score for "Opoona" was composed by Hitoshi Sakimoto and five fellow members of his Basiscape sound company.Sakimoto arranged the score in an orthodox manner with "futuristic" sounds as he had done with many of his past compositions by combining orchestral music with a synthesizer.However, his work on "Opoona" involved composing the songs through the characters' perspective to somehow lend the player their sympathy.