- 1 ONE OK ROCK
- 2 Official髭男dism
- 3 OH MY GIRL
- 4 OMEGA X
- 5 Orange Caramel
- 6 OnlyOneOf
- 7 ONEUS
- 8 ONEWE
- 9 Omoinotake
- 10 Orange Range
- 11 ONF
- 12 ONE OR EIGHT
- 13 OOM
- 14 Only this time
- 15 Obroject
- 16 Organic Stereo
- 17 OT
- 18 OWV
- 19 OCTPATH
- 20 ONE PACT
- 21 ODD EYE CIRCLE
- 22 ONE N' ONLY
- 23 OKAMOTO'S
- 24 Oreskaband
- 25 ONE LOVE ONE HEART
- 26 ONE☆DRAFT
- 27 OLDCODEX
- 28 OxT
- 29 One Off Them
- 30 ON/OFF