- Okamoto Island
- 岡本麻弥
- 岡本真夜
- 岡本奈穂子
- 岡本玲
- Okamoto's
- 岡村孝子
- Okamura & Takkyu
- 岡村靖幸
- O.K.AN
- Okan Ersan
- Okan Iloro
- Okan Ilu
- Okan Murat Öztürk
- Okano
- Okano Hironori
- Okapi Guitars
- Okara/Mothman
- Okari Kerschbaumer
- OKATCH BIGGY
- Okavango
- Okay
- Okay Cuba
- Okay Jazz
- Okay Paddy
- Okay Samurai
- Okay Temiz
- Okay Temiz Magnetic Band
- Okay Temiz & The Zurma Project
- Okay Temiz & The Zurna Project
- Okay Thursday
- Okayama
- Okay.com
- Okayplayer
- 岡崎律子
- 岡崎友紀
- Okean Elzy
- Okean Lubiy
- Okeanas