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