Oban Star Racers
Occult Academy
Oda Nobuna no Yabou
Oh! Edo Rocket
Ojamajo Doremi
Ojamajo Doremi Sharp
Ojamajo Doremi Na-i-sho
Ojamajo Doremi Dokka~n!
Okane Ga Nai / No Money
Omamori Himari
One Outs
One Piece
Onegai Teacher
Onegai Twins
ONIAI
Oniichan no Koto Nanka Zenzen Suki Janain Dakara ne—!!
Onmyou Taisenki
Ookami Kakushi
Ookami-san to Shichinin no Nakama-tachi
Ookiku Furikabutte
Ookiku Furikabutte ~Natsu no Taikai Hen~
Ore no Kanojo to Osananajimi ga Shuraba Sugiru
Oreimo
Oreimo 2
Orphen
Orphen: The Revenge
Otogi Zoshi
Otome wa Boku ni Koishiteru
Otome wa Boku ni Koishiteru: Futari no Elder
Otome Youkai Zakuro
Ouran High School Host Club
Outlaw Star
Overdrive
Ozuma
