Music Artists, Casts, Authors
- all at once
- Official HIGE DANdism
- OLDCODEX
- ORGEL
- OUI&RIO
- Over The Rainbow
- OSATO NAO
- OHTAKA SIZZLE
- おしりかじり虫
- OFUROSUKI
- Various Artists
- Orgel+
- THE ORCHESTRA JAPAN
- ALL THAT JAZZ
- Mitsuhiro Oikawa
- Mitsuhiro Oikawa
- OHARA YUIKO
- OTOMO JUN
- Takeshi Otomo
- Takeshi Otomo
- OTOMO TAKESHI & SUZUKI TSUBASA
- Ritsuko Oowada
- ANZA
- Michiru Oshima
- Michiru Oshima
- Taeko Ohshima
- OKI KOUSUKE
- Senri Ooe
- Senri Ooe
- Masayoshi Ohishi
- Kow Otani
- Ikue Otani
- OHNO KATSUO
- Katsuo Ohno
- Satoshi Ohno
- Matsuno Ohono
- Maki Ohguro
- Maki Ohguro
- Masami Okui
- Mika Okudoi
- Mika Okudoi
- KEIICHI OKU
- Tamio Okuda
- Yui Ogura
- Takashi Ohara
- Takashi Obara
- Mana Ogawa
- OZAWA KAZUTO
- OZAWA KAZUTO.URANAKA KOUICHI
- Shouichi Ozawa
- Shoichi Ozawa
- Yuki Ono
- Daisuke Ono
- Masatoshi Ono
- OKAZAKI TAIIKU
- Ritsuko Okazaki
- Nobuhiko Okamoto
- OGATA HIROMI
- Otowa Yurikagokai
- Otowa Yurikagokai
- Mayuko Omimura