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