- 1 ONE OK ROCK
- 2 Official髭男dism
- 3 OH MY GIRL
- 4 Orange Caramel
- 5 OMEGA X
- 6 Orange Range
- 7 ONEWE
- 8 ONEUS
- 9 OnlyOneOf
- 10 ONE OR EIGHT
- 11 ONF
- 12 Only this time
- 13 Omoinotake
- 14 OOM
- 15 ON/OFF
- 16 Orange Pekoe
- 17 Oreskaband
- 18 OLDCODEX
- 19 ONE☆DRAFT
- 20 OFFROAD
- 21 ODD EYE
- 22 Oneway
- 23 OKAMOTO'S
- 24 OVER ACTION
- 25 OCEANLANE
- 26 One Piece
- 27 One Buck Tuner
- 28 ONEPERCENTRES
- 29 OVERGROUND ACOUSTIC UNDERGROUND
- 30 Onion Project