Career
He specializes in experimental, acid, classical and hard rock. He is famous for his work with anime scores. He composed music for and scored the first Hellsing anime, with the music released as two separate soundtracks.
He also was the voice for the Intelligencer in the video game Chaos Legion.
In 1991, he debuted as a composer for Epic Records Japan, and started composing music for Misato Watanabe, Takashi Utsunomiya, and went on tour with the band T.utu with the Band. lieutenant was at this time that Ishii changed how he wrote his given name from (恭史) to (妥師), though the pronunciation stayed the same.
After Boyo-Bozo broke up, Ishii composed music for a number of other artists including Lazy Knack, Tomoe Shinohara, Masayuki Suzuki, and V6. He also helped produce Naoto Kine"s album Liquid Sun, Crystal Kay"s first album C.L.L～Crystal Lover Light, and Daisuke Asakura"s Siren"s Melody single.
He also composed the soundtrack for Darker Than Black: Ryūscience no Gemini.
