  | Ochikobore Fruit Tart | 2020 | Anime | 0.0 |
 | Odd Taxi | 2021 | Anime | 4.8 |
 | One Room 3 | 2020 | Anime | 5.0 |
 | Oniichan wa Oshimai! | 2023 | Anime | 0.0 |
 | Ore dake Haireru Kakushi Dungeon | 2021 | Anime | 4.5 |
 | Orient | 2022 | Anime | 5.0 |
 | Osananajimi ga Zettai ni Makenai Love Come | 2021 | Anime | 3.8 |
 | Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta… X | 2021 | Anime | 5.0 |
 | Otome Game Sekai wa Mob ni Kibishii Sekai desu | 2022 | Anime | 4.3 |
 | Otona no Bouguya-san 2 | 2021 | Anime | 0.0 |
 | Otonari no Tenshi-sama ni Itsunomanika Dame Ningen ni Sareteita Ken | 2023 | Anime | 4.7 |
 | Overlord IV | 2022 | Anime | 5.0 |
  | Oda Cinnamon Nobunaga | 2020 | Anime | 0.0 |
 | One Piece | 1999 | Anime | 4.3 |
 TV | One Piece Stampede | 2019 | Película | 3.9 |
 | One punch man | 2015 | Anime | 5.0 |
 | One Punch Man 2 | 2019 | Anime | 5.0 |
 | Ongaku Shoujo | 2018 | Anime | 0.0 |
 | Ore ga Suki nano wa Imouto dakedo Imouto ja Nai + Ovas | 2018 | Anime | 5.0 |
 | Ore wo Suki nano wa Omae dake ka yo | 2019 | Anime | 5.0 |
 TV | Ore wo Suki nano wa Omae dake ka yo: Oretachi no Game Set | 2020 | OVA | 4.3 |
 | Oshi ga Budoukan Ittekuretara Shinu | 2020 | Anime | 5.0 |
 | Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta | 2020 | Anime | 5.0 |
 | Otona no Bouguya-san | 2018 | Anime | 5.0 |
