| 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 |
- |
| Otaku no Musume-San |
2006 |
5+ |
- |
| Otaku Otaku |
2014 |
5+ |
- |
| Otenki Onesan |
1992 |
8 |
- |
| Othello |
2002 |
1 |
- |
| Othello |
2001 |
7 |
- |
| Othello (Otsu Hiyori) |
2011 |
1 |
- |
| Otogi no Machi no Rena |
2002 |
7 |
- |
| Otogi Rôkan |
2008 |
2 |
- |
| Otogi Taisen Fantasma |
2013 |
3 |
- |
| Otogizôshi |
2004 |
2 |
- |
| Otoko no Ko Dakara ne |
2003 |
1 |
- |
| Otoko Zaka |
1984 |
8+ |
- |
| Otokomae! Beads Club |
2004 |
1 |
- |
| Otome Game |
2017 |
7+ |
- |
| Otome Ni Nante Naremasen |
2014 |
1 |
- |
| Otome No Teikoku |
2010 |
14+ |
- |
| Otome Ôji |
2008 |
1 |
- |
| Otome Sensô |
2013 |
12 |
- |
| Otome wa Boku ni Koishiteru: Futari no Elder |
2010 |
3 |
- |
| Otome Yôkai Zakuro |
2006 |
4+ |
- |
| Otomege Sekai wa Mob ni Kibishii Sekai Desu |
2018 |
7+ |
- |
| Otomegokoro |
2008 |
2 |
- |
| Otomen |
2007 |
18 |
- |
| Otona no Mondai |
1997 |
1 |
- |
| Otonohako |
2008 |
1 |
- |
| Ottori Sôsa |
1996 |
10 |
- |
| Ou To Sokkin |
2011 |
1 |
- |
| Oudoumon |
2003 |
2 |
- |
| Ouji To Houkago |
2010 |
1 |
- |
| Our Colorful Days |
2018 |
1+ |
- |
| Our Little Secret |
2015 |
8 |
- |
| Our Summer Love |
2016 |
1 |
- |
| Ouroboros |
2009 |
15+ |
- |
| Out (Mizuta Makoto) |
2012 |
15+ |
- |
| Outbreak Company: Moeru Shinryakusha |
2012 |
1+ |
- |
| Outlanders |
1986 |
8 |
- |
| Outlaw Players |
2016 |
1+ |
- |
| Outlaw Star |
1997 |
3 |
- |
| Outsiders |
2019 |
1+ |
- |
| Over Drive |
2005 |
1+ |
- |
| Over Time |
2006 |
3 |
- |
| Overlord |
2014 |
5+ |
- |
