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