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| Name | Alternative/Original Name | Tags |
|---|---|---|
| Oasis | English, Rock, Band | |
| OLIVIA | OLIVIA inspi' REIRA (TRAPNEST) | Female, J-Rock, Japanese |
| ONE OK ROCK | J-Rock, Band, Japanese | |
| Onmyouza | 陰陽座 | Metal, Band, Japanese |
| ORANGE RANGE | J-Rock, Band, Japanese |