All songs of Kou
- A, Kuma. [Oh! A Bear!]
- Adam no Hidari Te [Adam's Left Hand]
- Atashi World
- Binea no Meikyuu [Labyrinth of Binua]
- Dante no Buki [Dante Dances Like A Demon]
- Eloise
- Eme no Enpitsu
- HappY EnD
- Namida Nokoshi
- Nante [What a Beautiful Flower]
- Neko Kissa [Cat Cafe]
- Neko Yuukaku
- Olga no Juubi [Olga and Ten Tailed Fox]
- otodama [Sound Ghost]
- Paladin
- REFRAIN
- Reku no Kuusou [Reku Runs in the Sky]
- Rohi no Kodoku
- Saishi
- SUPERBIA
- Twi
- Zoukama [Artificial Lover]