Groups
- okkinoko 5
- ole 5
- omaru bokujou 5
- omega circuit 5
- omoshiro usagi 5
- onaka ga suita 5
- onishima no gogo 5
- onsen ninja 5
- ontama bukkake 5
- onyanko hamehame 5
- oppai click 5
- orange 5
- orange pekoe 5
- ore jon 5
- orenge dice 5
- origami farm 5
- origotoh 5
- orukaniumu-labo 5
- osajindou 5
- osakana planet 5
- osaru-san panic 5
- osiris pictures 5
- osyonsyo 5
- otete 5
- otinpop 5
- otofubarricade 5
- ougi production 5
- ousama no guntai 5
- over flows 5
- overpants 5
- owanko club 5
- oyoyo 5
- pabisshu 5
- paiguil 5
- panchira kick 5
- panjandrum 5
- pannomimi 5
- pants 5
- paon 5
- pascal kikaku 5
- paschara-mode 5
- passing shower 5
- pastel color 5
- peacecorps201 5
- peach breeze 5
- pearl soft 5
- pen to mahou 5
- peneya 5
- perinpo 5
- peso gin 5