- Oda Nobuna no Yabou
- Omamori Himari Uncesured
- One Piece
- One Piece Special Edition
- Onegai Teacher
- Onegai Twins
- Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne!
- Oniichan no Koto Nanka Zenzen Suki Janain dakara ne!!
- Oniichan no Koto Nanka Zenzen Suki Janain dakara ne!!(BLU-RAY)
- Onmyou Taisenki
- Ookami kakushi
- Ookami-san to Shichinin no Nakama-tachi
- Ookiku Furikabutte
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai
- Ore no Imouto ga Konna ni Kawaii Wake ga Nai (BLU-RAY)
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Ore-tachi ni Tsubasa wa Nai
- Otogizoushi
- Otome Youkai Zakuro
- Ouran High School Host Club
- Over Drive
- Overman King Gainer
- Ozma