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From Wikipedia: http://en.wikipedia.org/wiki/Sound_Horizon
Sound Horizon, abbreviated by fans as Sanhora (サンホラ), is a Japanese musical group with composer Revo as the leader.
Their music is generally in omnibus style; an album contains multiple stories with different themes that create one long story. Soprano or mezzo-soprano vocals are mainly utilized. Usage of narration is not restrained. Strong anime influences and applications are apparent in their music; they have started inviting seiyū for narration since their major debut. Their lyrics are very often mysterious and metaphorical, even more so than those of other J-rock musicians, with themes varying from fantastic ones like ancient curse, legend, dreams, war, and paradise to forbidden lust, longing, obsession, crime, relationships, etc.
- Revo (レヴォ): Composition, arrangement, lyrics, guitar, keyboard, accordion, etc.
- yokoyan (よこやん): Cover illustrator. The oldest support member of SH, she/he has been involved since its establishment.
- Jimang (じまんぐ): Vocal, chorus, narration, voice. Since his debut in Lost, he has participated in all of SH's subsequent releases.
- Saitou "Jake" Shingo (斉藤"Jake"慎吾): Guitar, band master, concert master
- YUUKI (ゆうき): Vocal, chorus. Formerly a member of the group "SpringS" with Aya Hirano and Ayaka Itō
- KAORI (かおり): Vocal, chorus. Also a member of FictionJunction.
- REMI (れみ): Vocal, chorus
- MIKI (みき): Vocal, chorus
- RIKKI (りっき): Vocal, chorus
- Minami Kuribayashi (栗林みな実): Vocal, chorus
- Mari Endou (遠藤麻里): Vocal, chorus
- Takashi Utsunomiya (宇都宮隆): Vocal, chorus
- Haruka Shimotsuki (霜月はるか): Vocal, chorus, voice. Has been involved with the group since Lost.
- Joelle (ジョエル): Vocal, chorus
- Atsushi Hasegawa (長谷川淳): Bass
- Ryou Sakagami (坂上領): Flute
- Ken☆Ken (けん☆けん): Drums
- Azumi Inoue (井上あずみ): Vocal, chorus
- Eiji Kawai (河合英史): Keyboard
- Ike Nelson: Voice, narration
- Rika Fukami (深見梨加): Voice, narration
- Watanabe☆Fire (渡辺☆Fire): Saxophone
- Hirokazu Ebisu (恵比須弘和): Sound effects
- Kyouko Ishigame (石亀協子): Violin
- Machi Okabe (岡部磨知): Violin
- Mio Wakamatsu (若松美緒): Viola
- Maiko Sato (佐藤万衣子): Cello
- Tomotaka Saka (坂知学): Manipulator
- Gen Ittetsu (弦一徹): Violin (solo)
- Gen Ittetsu Strings: Strings ensemble
- Marty Friedman: Guitar
- Jun-ji: Drums
- Motoi Sakuraba (桜庭統): Keyboard
Aramary, a former member, was the first vocalist and narrator in the Japanese band Sound Horizon. Due to unknown reasons, she left Sound Horizon on March 2006.