Yasushi Ishii (石井 妥師 Ishii Yasushi, born 10 March 1970) is a Japanese composer and voice actor from Utsunomiya, Tochigi Prefecture, Japan. 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 Hellsing anime, with the music released as two separate soundtracks. He also was the voice for the Intelligencer in the video game Chaos Legion.