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