Toshihiko Sahashi
Victor Entertainment released two maxi singles that served as theme music for "Simoun" anime series. The opening theme, , performed by Chiaki Ishikawa, was released on April 4, 2006. The ending theme, , performed by Savage Genius, was released on April 19, 2006. Two original soundtracks were released across two albums titled "Simoun Original Soundtrack 1" and "Simoun Original Soundtrack 2", released by Victor Entertainment on June 21, 2006 and August 30, 2006. All 52 tracks except the opening and ending theme were composed by Toshihiko Sahashi.