Titles
Titles - O
- Ōban Star-Racers (TV)
- Odin (movie)
- Ogenki Clinic (OVA)
- Ogre Slayer (OVA)
- Oh My Goddess! (OVA)
- Oldboy (live action)
- Once Upon a Time (movie)
- One Missed Call (live action)
- Oni-Tensei (OVA)
- Orchid Emblem (OVA)
- Orguss (TV)
- Orguss 02 (OVA)
- Origin: Spirits of the Past (movie)
- Original Dirty Pair (OVA)
- Original Dirty Pair: Affair of Nolandia (OVA)
- Original Dirty Pair: Flight 005 Conspiracy (OVA)
- Original Dirty Pair: Project EDEN (movie)
- Orphen (TV)
- Orphen: Revenge (TV)
- Orphen: Scion of Sorcery (VG)
- Otaku no Video (OVA)
- Otogizoshi (TV)
- Ouran High School Host Club (TV)
- Outlanders (OVA)
- Outlanders (OVA)
- Outlaw Star (TV)
- Overman King Gainer (TV)
- Ox Tales (TV)