- 1 ONE OK ROCK
- 2 OH MY GIRL
- 3 Orange Caramel
- 4 Official髭男dism
- 5 ONEUS
- 6 ONEWE
- 7 OMEGA X
- 8 Orange Range
- 9 Omoinotake
- 10 OnlyOneOf
- 11 ONE N' ONLY
- 12 OxT
- 13 ODD EYE CIRCLE
- 14 ONF
- 15 offonoff
- 16 ON/OFF
- 17 Orange Pekoe
- 18 Oreskaband
- 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