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