- 1 ONE OK ROCK
- 2 OH MY GIRL
- 3 Official髭男dism
- 4 ONEUS
- 5 Orange Caramel
- 6 OMEGA X
- 7 ONEWE
- 8 Orange Range
- 9 ONF
- 10 OxT
- 11 Omoinotake
- 12 ORESAMA
- 13 OnlyOneOf
- 14 ODD YOUTH
- 15 OuiOui
- 16 Obroject
- 17 OCTPATH
- 18 OH MY GIRL BANHANA
- 19 ONE☆DRAFT
- 20 ON/OFF
- 21 Orange Pekoe
- 22 Oreskaband
- 23 OLDCODEX
- 24 OFFROAD
- 25 ODD EYE
- 26 Oneway
- 27 OKAMOTO'S
- 28 OVER ACTION
- 29 OCEANLANE
- 30 ONEPERCENTRES