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