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