Kenji Kawai
Mamoru Oshii has worked extensively with Production I.G. Every animated film he has made since "" (1989) has been produced under the studio. He also worked closely with screenwriter Kazunori Itō; they made five films together, beginning with "The Red Spectacles" and ending with "Avalon". His closest colleague, however, is music composer Kenji Kawai. Kawai has composed most of the music in Oshii's work, including ten of his feature films. According to Oshii, "Kenji Kawai's music is responsible for 50 percent of [his] films' successes" and he "can't do anything without [Kenji Kawai]."