| Oneira - L'enfant Cauchemar |
2022 |
4 |
- |
| Oneman Army Gatse |
2008 |
1 |
- |
| Oni |
1997 |
1 |
- |
| Onidere |
2008 |
4+ |
- |
| Onihei Crime Reports in Edo |
1993 |
1 |
- |
| Onihime |
1972 |
1 |
- |
| Onihime VS |
2010 |
4 |
6 (1) |
| Onii-Chan Control |
2009 |
5 |
- |
| Onii-chan wa Oshimai! |
2017 |
1 |
- |
| Onikirimaru |
1991 |
20 |
- |
| Oninagi |
2007 |
4 |
- |
| Online - The Comic |
2013 |
10+ |
- |
| Only Love |
2009 |
1 |
- |
| Only One |
2012 |
1 |
- |
| Only You - Tobenai Tsubasa |
1997 |
8 |
- |
| Onmyô Taisenki |
2004 |
3 |
- |
| Onmyôji |
1994 |
13 |
- |
| Onna No Ie |
2012 |
2+ |
- |
| Onna No Kataki Wa Onna |
1990 |
1 |
- |
| Onna Yûsha to Shota Orc |
2019 |
1+ |
- |
| Onnanoko Atsumare! |
1970 |
1 |
- |
| Onnanoko ga Shinu Hanashi |
2013 |
1 |
- |
| Onsen Yôsei Hakone-chan |
2012 |
2+ |
- |
| Ontama |
2009 |
2 |
- |
| Onzôshi No Otehodoki |
2012 |
1 |
- |
| Oogata Shinjin No Kyouikukei |
2015 |
1 |
- |
| Ookami Heika No Hanayom |
2009 |
14+ |
- |
| Ookami Ni Kuchizuke |
2012 |
2 |
- |
| Ookami Rise |
2018 |
5 |
- |
| Ookamidomo No Shitsukekata |
2011 |
1 |
- |
| Ookiku Furikabutte |
2004 |
26+ |
- |
| Ootagawa Junjou Lovers |
2013 |
1 |
- |
| Open 24 hours a day |
2009 |
1 |
- |
| Open Sesame |
2001 |
17+ |
- |
| Opera-za de Mattete |
1990 |
1 |
- |
| Opération Mort |
1995 |
1 |
- |
| Opération Santa |
2008 |
4 |
- |
| Opérations Dans Le Pacifique |
2013 |
1 |
- |
| Opus |
2010 |
2 |
- |
| Ôran High School Host Club Anime Fan Book |
2007 |
1 |
- |
| Orange |
2006 |
1 |
5 (1) |
| Orange (Takano Ichigo) |
2012 |
6 |
- |
| Orange Bubble Gum |
2005 |
4+ |
- |
| Orange Chocolate |
2008 |
10+ |
- |
| Orange Delivery |
2004 |
4 |
- |
| Orange Lips |
2010 |
1 |
- |
| Orange Marmalade |
2011 |
8 |
- |
| Orange Yane no Chiisana Ie |
2005 |
8 |
- |
| Orange Yellow |
2010 |
1 |
- |
| Orbitaria |
2012 |
4 |
- |
| Order Wa Boku De Yoroshii Desu Ka? |
2007 |
1 |
- |
| Ore dake Haireru Kakushi Dungeon |
2017 |
5+ |
- |
| Ore ga Heroine o Tasukesugite Sekai ga Little Mokushiroku!? |
2011 |
1+ |
- |
| Ore ga Kaizoku |
1991 |
2 |
- |
| Ore Ga Ojô-Sama Gakkô Ni "Shomin Sample" Toshite Rachirareta Ken |
2012 |
9+ |
- |
| Ore ga Suki nano wa Imôto dakedo Imôto ja nai |
2017 |
1+ |
- |
| Ore ni Koi Shite Dôsunda |
2007 |
1 |
- |
| Ore no Imôto ga Konna ni Kawaii Wake ga Nai |
2008 |
2+ |
- |
| Ore no Kanojo to Osananajimi ga Shuraba Sugiru |
2011 |
7 |
- |
| Ore No Ningyohime |
2015 |
1 |
- |
| Ore no Subete ga Kimi no Mono |
2011 |
1 |
- |
| Ore Ore |
2013 |
1 |
- |
| Ore Ride!! |
2013 |
1 |
- |
| Ore Wo Suki Nano Wa Omae Dake Ka Yo |
2017 |
3+ |
- |
| Orebushi |
1991 |
9 |
- |
| Orenchi no Furo Jijō |
2011 |
8 |
- |
| Orera Kourin! |
2009 |
3 |
- |
| Oresama Ouji |
2008 |
1 |
- |
| Oretachi Ni Ai Wa Nai |
2007 |
1 |
- |
| Orette, Tenshi |
2006 |
1 |
- |
| Orfina |
1992 |
12 |
- |
| Orfina SAGA |
2005 |
8 |
- |
| Orgueil Et Préjugés |
2014 |
1 |
- |
| Orichalcum Reycal |
2008 |
3+ |
- |
| Orient - Samurai Quest |
2018 |
8+ |
- |
| Origin |
2016 |
10 |
- |
| Orion |
1991 |
2 |
- |
| Orochi |
1969 |
4 |
- |
| Oroka Na Tenshi Wa Akuma To Odoru |
2016 |
12+ |
- |
| Orpheus no Mado |
1975 |
18 |
- |
| Oruchuban Ebichu |
1997 |
9 |
- |
| Osagegami |
2012 |
1 |
- |
| Osaka Hamlet |
2006 |
3+ |
- |
| Osake Wa Fûfu Ni Natte Kara |
2015 |
6+ |
- |
| Ōsamatachi No Viking |
2013 |
19 |
- |
| Osamu Tezuka - Une Vie En Manga |
2009 |
1 |
- |
| Osananajimi ga Zettai ni Makenai LoveCome |
2019 |
2+ |
- |
| Oshare Kozô wa Hanamaru |
1988 |
10 |
- |
| Oshi ga Budôkan Ittekuretara Shin |
2015 |
6+ |
- |
| Oshi No Ko |
2020 |
10+ |
- |
| Oshiete! Galko-chan |
2014 |
1 |
- |
| Oshiire |
1997 |
1 |
- |
| Oshikiri Rensuke Gekijou Masashi!! Ushiro da!! |
2005 |
1 |
- |
| Oshioki Ôji |
2012 |
1 |
- |
| Ōshitsu Kyōshi Heine |
2013 |
5+ |
- |
| Osomatsu-kun |
1962 |
34 |
- |
| Osomatsu-san |
2016 |
10 |
- |
| Osore |
1985 |
1 |
- |
| Ossu! Mushikings!! |
2006 |
1+ |
- |
| Otaku Club |
2007 |
1 |
- |
