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