- 1 ONE OK ROCK
- 2 Official髭男dism
- 3 OH MY GIRL
- 4 Orange Caramel
- 5 ONEUS
- 6 ONEWE
- 7 OMEGA X
- 8 Omoinotake
- 9 OxT
- 10 OnlyOneOf
- 11 ONF
- 12 ONE N' ONLY
- 13 ONE OR EIGHT
- 14 Orange Range
- 15 OuiOui
- 16 ONE PACT
- 17 offonoff
- 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 ONEPERCENTRES
- 30 OVERGROUND ACOUSTIC UNDERGROUND