Groups
- oshiire tanken-tai 1
- oshiri chuuou byouin shiridenbu hip ketsu geka 1
- oshiruko sentimental 1
- oshiruko-saida 1
- osio soft 1
- ostamin house 1
- osushi daisuki ojisan 1
- osushidaisuki 1
- osushiyasan 1
- osuwari 1
- ote 1
- otenkiya 1
- oteyawarakani 1
- otobokechasoba 1
- otocinq 1
- otohikoboshi 1
- otohime-dou 1
- otoko doushi 1
- otoko-jyuku 1
- otokogumo 1
- otokonoko club z 1
- otokonoko koubou 1
- otokozaka onnazaka 1
- otome half line 1
- otome rinna 1
- otona-ehon 1
- otonashi-ya 1
- otonayuenchi 1
- ototoi n 1
- otsujyo 1
- otsukimi capsule 1
- otsumami 1
- otsumami koubou 1
- ouchi jikan 1
- ouchiiro 1
- oudon torotoroya 1
- ougon no tori 1
- ouioui 1
- oukoku shineitai 1
- oukokudou 1
- oumiya 1
- out of tune 1
- out of worker 1
- outcount 1
- outdate 1
- outgrow 1
- over all 1
- over easy 1
- over heat 1
- over rice 1