0 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| Okusama wa Maho Shoujo (TV) | |
| Omamori Himari (Manga) | |
| One Litre of Tears~~Ichi Rittoru no Namida (JDrama) | |
| One Piece (TV) | |
| One Piece Movie 1 - The Great Gold Pirate (Movie) | |
| One Piece Movie 2 - Clockwork Island Adventure (Movie) | |
| One Piece Movie 3 - Chopper Kingdom of Strange Animal Island (Movie) | |
| One Piece Movie 4 - Dead End no Bouken (Movie) | |
| One Piece Movie 5 - Norowareta Seiken (Movie) | |
| One Piece Movie 6 - Omatsuri Danshaku to Himitsu no Shima (Movie) | |
| One Piece Movie 7 - Karakuri Shiro no Mecha Kyohei (Movie) | |
| One Piece Movie 8 - Episode of Alabaster - Sabaku no Ojou to Kaizoku Tachi (Movie) | |
| One Piece Movie 9 - Episode of Chopper Plus - Fuyu ni Saku, Kiseki no Sakura (Movie) | |
| Onegai Twins (TV) | |
| Onidere (Manga) | |
| Only Yesterday (Movie) | |
| Origin Spirits Of the Past (Movie) | |
| Orphen (TV) | |
| Orphen Revenge (TV) | |
| Oruchuban Ebichu (TV) | |
| Otogi-Jushi Akazukin (TV) | |
| Otogi-Jushi Akazukin OVA (OVA) | |
| Otogizoushi (TV) | |
| Otome Wa Boku Ni Koishiteru (TV) | |
| Ouran High School Host Club (TV) | |
| Outlaw Star (TV) | |
| Overdrive (TV) |
