Groups
- nishimaa 6
- niwanihaniwa 6
- no reset club 6
- noir 6
- noizy sweet 6
- nokko otsu 6
- norakurari. 6
- norinori seika 6
- novelize 6
- nowloading 6
- ns 6
- nt robo 6
- nukarumi 6
- nuku nuku dou 6
- null poplus 6
- nw-project 6
- nyaamen fork 6
- nyan nyan 6
- nyannyan 6
- nyoroman shouji 6
- o-mega 6
- o-yukikeihou 6
- ochichio 6
- ofuzake tale 6
- oishii ko 6
- ojou no yokushitsu 6
- okiraku rakuchintei 6
- oko-san 6
- okosamastar company 6
- oltos 6
- om 6
- omoide pokke 6
- onakin data land 6
- one week holiday 6
- oniku ga tabetai gozen niji 6
- oniyuri 6
- onnanoko payapaya 6
- oppai brothers 6
- oppai mochi 6
- orange crown 6
- orange hip 6
- orange house 6
- orange mimosa 6
- orange peel 6
- orz commushoz 6
- osakana koujou 6
- oscilloscope 6
- oshiro merry 6
- oso 6
- osoushiki 6