- 1 ONE OK ROCK
- 2 Orange Caramel
- 3 OH MY GIRL
- 4 Official髭男dism
- 5 ONE N' ONLY
- 6 ONEUS
- 7 OMEGA X
- 8 ONEWE
- 9 Omoinotake
- 10 ONE LOVE ONE HEART
- 11 OnlyOneOf
- 12 ODD EYE CIRCLE
- 13 ONF
- 14 ORESAMA
- 15 Oreskaband
- 16 Orange Range
- 17 ON/OFF
- 18 Orange Pekoe
- 19 OLDCODEX
- 20 ONE☆DRAFT
- 21 OFFROAD
- 22 ODD EYE
- 23 Oneway
- 24 OKAMOTO'S
- 25 OVER ACTION
- 26 OCEANLANE
- 27 ONEPERCENTRES
- 28 OVERGROUND ACOUSTIC UNDERGROUND
- 29 Onion Project
- 30 OGRE YOU A**HOLE