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