Anime List O
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List of Anime Titles beginning with the letter O
- Obey Me!
- Obey Me! Season 2
- Obey Me!: Makai Dai Ryokou!
- Occultic;Nine
- Ochibi-san
- Ochikobore Fruit Tart
- Oda Cinnamon Nobunaga
- Oda Nobuna no Yabou
- Odd Taxi
- Ojamajo Doremi
- Ojisan to Marshmallow
- Ojou to Banken-kun
- Okashi na Tensei
- Okoshiyasu, Chitose-chan
- Okusama ga Seitokaichou!
- Okusama ga Seitokaichou!+!
- Okusama wa Joshikousei (TV)
- Omae wa Mada Gunma wo Shiranai
- Omamori Himari
- Omiai Aite wa Oshiego, Tsuyoki na, Mondaiji.
- One Outs
- One Piece
- One Piece 3D2Y: Ace no shi wo Koete! Luffy Nakama Tono Chikai
- One Piece Film: Red
- One Piece Live Action
- One Piece: Dai Gekisen Tokushuu! Mugiwara no Ichimi vs. Tobi Roppou
- One Piece: Episode of Luffy – Hand Island no Bouken
- One Piece: Episode of Nami – Koukaishi no Namida to Nakama no Kizuna
- One Piece: Episode of Sorajima
- One Piece: Heart of Gold
- One Punch Man
- One Punch Man 2nd Season
- One Punch Man 2nd Season Commemorative Special
- One Punch Man 2nd Season Specials
- One Punch Man Specials
- One Punch Man: Road to Hero
- One Room
- One Room Second Season
- One Room Third Season
- Oneechan ga Kita
- Onegai☆Teacher
- Onegai☆Twins
- Ongaku Shoujo
- Onihei
- Oniichan dakedo Ai sae Areba Kankeinai yo ne!
- Oniichan no Koto nanka Zenzen Suki ja Nai n da kara ne!!
- Oniichan wa Oshimai!
- Onipan!
- Ookami Shoujo to Kuro Ouji
- Ookami Shoujo to Kuro Ouji: Gishinanki – Happening Kiss
- Ookami to Koushinryou
- Ookami to Koushinryou II
- Ookami-san to Shichinin no Nakama-tachi
- Ookamikakushi
- Ookiku Furikabutte
- Ookiku Furikabutte: Natsu no Taikai-hen
- Ooyasan wa Shishunki!
- Ooyukiumi no Kaina
- Orange
- Ore dake Haireru Kakushi Dungeon
- Ore ga Ojousama Gakkou ni “Shomin Sample” Toshite Gets♥Sareta Ken
- Ore ga Ojousama Gakkou ni “Shomin Sample” Toshite Gets♥Sareta Ken Specials
- Ore ga Suki nano wa Imouto dakedo Imouto ja Nai
- Ore Monogatari!!
- Ore no Imouto ga Konnani Kawaii Wake ga Nai
- Ore no Imouto ga Konnani Kawaii Wake ga Nai.
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteiru
- Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteiru OVA
- Ore wo Suki nano wa Omae dake ka yo
- Ore wo Suki nano wa Omae dake ka yo: Ore wa Teinei ni Susumeru
- Ore, Twintail ni Narimasu.
- Oretachi ni Tsubasa wa Nai: Under the Innocent Sky.
- Orient
- Orient: Awajishima Gekitou-hen
- Osake wa Fuufu ni Natte kara
- Osananajimi ga Zettai ni Makenai Love Comedy
- Oshi ga Budoukan Ittekuretara Shinu
- Oshiete! Galko-chan
- Osomatsu-san
- Osomatsu-san 2nd Season
- Osomatsu-san 3rd Season
- Otogi Story Tenshi no Shippo
- Otogi Story Tenshi no Shippo Specials
- Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta…
- Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei shiteshimatta… X
- Otome Game Sekai wa Mob ni Kibishii Sekai desu
- Otome wa Boku ni Koishiteru
- Otome wa Boku ni Koishiteru: Futari no Elder The Animation
- Otome Youkai Zakuro
- Otona no Bouguya-san
- Otona no Bouguya-san (Rimen)
- Otonari ni Ginga
- Otonari no Tenshi-sama ni Itsunomanika Dame Ningen ni Sareteita Ken
- Ou Dorobou Jing
- Ouran Koukou Host Club
- Ousama Game The Animation
- Ousama Ranking
- Ousama Ranking: Yuuki no Takarabako
- Oushitsu Kyoushi Heine
- Outbreak Company
- Over Drive
- Overlord
- Overlord II
- Overlord III
- Overlord IV
- Overlord: Ple Ple Pleiades
- Overlord: Ple Ple Pleiades 2
- Overlord: Ple Ple Pleiades 3
- Overtake!
- Owari no Seraph
- Owari no Seraph: Nagoya Kessen-hen
- Owarimonogatari
- Owarimonogatari 2nd Season
- Ozma
- Ozmafia!!
