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| Key | Song | Notes | Artist |
|---|---|---|---|
| 1011 | Chiksilog | Kamikazee | |
| 31059 | Circle of Life | Lion King OST | Elton John |
| 62189 | COLORS | Code Geass OP1 | FLOW |
| 61348 | COLORS | Hikaru Utada | |
| 62230 | Colors of the Heart | Blood+ OP3 | UVERworld |
| 30021 | Come Together | The Beatles | |
| 30822 | Complicated | Avril Lavigne | |
| 62228 | COPPELIA no Hitsugi (コッペリアの柩) | Noir OP | ALI PROJECT |
| 62190 | COUNTDOWN | hyde | |
| 30734 | Crazy | Aerosmith | |
| 31043 | Crazy in Love | Beyoncé feat. Jay Z | |
| 62804 | Crazy Moon ~Kimi wa Muteki~ (Crazy Moon～キミ・ハ・ムテキ～) | Arashi | |
| 30544 | Creep | Radiohead | |
| 62933 | Crow Song | Angel Beats Insert Song (marina vocals) | Girls Dead Monster |
| 30830 | Cry | Mandy Moore |