Groups
- ones pace 1
- ongire 11
- ongr 4
- oni 69dan 16
- oni kizoku 81
- oni puni 1
- onibi kuudan 3
- onichan-doctor 1
- onichiku-ya 1
- onichikusyou 11
- onigiri 2
- onigiri manmosu shoukai 1
- onigiri to okazu 10
- onigiriz 9
- onii 2
- oniichan club 1
- oniichan no imouto shutchoujo 2
- onikibitou 3
- oniku 1
- oniku ga tabetai gozen niji 6
- onikushop 4
- oninoe 36
- onion and soup 1
- onion software 3
- onion works 1
- onisake 11
- onishima no gogo 5
- oniyamadou 1
- oniyamanchi 2
- oniyuri 6
- onizukachris 18
- onkin yuugi 4
- online superheroes 33
- onna kishi no shiro 141
- onna ni yoru onna e no ryoujoku 108
- onnanoko himitsu seisan koujou 11
- onnanoko mix 10
- onnanoko payapaya 6
- onock tei 1
- onoderasanchi 8
- onoe network 38
- onokanata tengoku 1
- onoko ya honpo 10
- onomatope 39
- onomatopoeia 27
- onomimono. 1
- onoppoka 2
- onpemen 2
- onpuman 4
- onpuri 2