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