- OLヴィジュアル系
- OL進化論
- OVER TIME
- Over Drive
- OPEN SESAME
- OH!MYコンブ
- OH!ぱにっくBOY
- OPERATIONG.G.
- ORANGE
- ONE OUTS
- ONE PIECE
- ONE×3
- Ordinary±梟-オウル-
- OUT (二ノ宮知子)
- OUT (みずたまこと)
- OUT PITCH
- O/A
- OLですが、キャバ嬢はじめました
- OH!サンシャイン
- OH!スーパーミルクチャン
- Ordinary±
- Oh!透明人間
- OVERMANキングゲイナー
- Oh・パンタクBOY
- OH!!ミスター
- OH!離婚家族
- Occultic;Nine -オカルティック・ナイン-
- OZ (岩井恭平・刻夜セイゴ)
- OZ (樹なつみ)
- ODAIBAラブサバイバル
- Odds -オッズ-
- OhiMesama
- Only You-翔べない翼-
- Only You ビバ!キャバクラ
- Out of Galaxy 銀のコーシカ
- Only Sense Online
- ORIGIN
- Odds VS!
- OSAMU GOODS CATALOG
- OREN'S
- OUT
- Over The Rainbow!
- ONE PIECE FILM GOLD アニメコミックス
- ONE PIECE RED
- orange
- Op-オプ- 夜明至の色のない日々
- OLマンガ家の帰宅めし
- ONE PIECE DOORS!
- OldWest
- ONE PIECE コビー似の小日山～ウリふたつなぎの大秘宝～
- OSの魔法使い
- OLさんと猫のはなし
- ONE PIECE学園
- ON AIR'S
- ONE PIECE 500 QUIZ BOOK
- OL、ラッコを飼う。
- OH MY DOG! まっすぐにいこう。
- OL -Office Love-
- OH MY DOG! まっすぐにいこう。～キキの場合～
- Obey Me! The Comic
- orange complete BOX
- OBSOLETE ハナブサレポート
- OH!MYコンブ ミドル
- OMEGA ONE
- ONE PIECE episode A
- Outsiders
- OLと人魚
- ONE PIECE BLUE GRAND ATA FILE SIMPLE VERSION
- ONE PIECE ODYSSEY 冒険記録
- OHMYGOD
- ONE PIECE 第四部 EP10 BOX・ワノ国
- ONE PIECE FILM RED
- OL Vtuberと推しJKちゃん
- ONE FOR ALL
- OCTOPATH TRAVELER 大陸の覇者 ～The story of Bargello family～
- Odds VS!外伝 HANA×HANA
- OMORI
- Oh My Goddess!
- Oh, mia dea!
- One-pound Gospel
- Oishinbo
- Oishimbo
- Ogon Bat
- Ouran High School Host Club
- OL Shinkaron
- Ooku - Le stanze proibite
- Over Drive
- Over Rev!
- Open Sesame
- Okami-san
- Okusama wa 18-sai
- Oku-sama wa Joshi Kōsei
- Okusama wa Joshikousei
- Ozanari Dungeon
- Ojamajo Doremi
- Osomatsu-kun
- Otaku no Musume-san
- Ocha Nigosu
- Otoko Ippiki Gaki Daisho
- Otome wa boku ni koishiteru
- Otomen
- Oniisama e...
- Onegai Teacher
- Obake no Q-Tarō
- Obake no Q-Taro
- Obatarian
- Ohayō! Spank
- Ohayo! Spank
- Offside
- Obocchamakun
- Omamori Himari
- Omishi Magical Theater: Risky Safety
- Omega Tribe
- Orpheus - La finestra di Orfeo
- Oresama Teacher
- Our Field of Dreams
- Oreimo
- Ore no imōto ga konna ni kawaii wake ga nai
- Oreshura
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Orochi: Blood
- Orochi
- Onmyōji
- Orange Road
- Occhi di gatto
- Ode to Kirihito
- O-Parts Hunter
- Orion
- Onward Towards Our Noble Deaths
- Otaku girls
- Okko's Inn
- Okko et les Fantômes
- Okko y los fantasmas
- One Outs
- One-Punch Man
- One Piece
- One Piece. Большой куш
- Otaku Otaku
- Outbreak Company
- Outbreak Company: Moeru Shinryakusha
- Outlanders
- One Week Friends
- One Piece Wanted!
- Our Little Sister - Diario di Kamakura
- Ouroboros
- Oiran Girl
- Oumagadoki Zoo
- Oumagadoki Doubutsuen
- Oi! Ryoma
- Oh! Edo Rocket
- OL开始当女公关
- Okami Kakushi
- Ookami Shounen Ken
- Osaka Hamlet
- Odin Sphere
- Overman King Gainer
- Ooya-san wa Shishunki!
- Occultic;Nine
- Occultic;Nine -오컬틱 나인-
- Okitsune-sama de Chu
- Okusama ga Seito Kaichō!
- Oku-sama wa Mahō Shōjo: Bewitched Agnes
- Oku-sama wa Maho Shojo
- Oku-san
- Octave
- Oshiete! Galko-chan
- Oshizamurai Kiichihōgan
- Ojisan and Marshmallow
- Ojisan to Marshmallow
- Ojamanga Yamada-kun
- Ojarumaru
- Osomatsu-san
- Oda Nobuna no yabō
- Ochikobore Fruit Tart
- Ochikobore Furūtsu Taruto
- Ochibi-san
- Otouto Catcher Ore Pitcher De!
- Otōto no Otto
- Otogi-Jūshi Akazukin
- Otogi-Juushi Akazukin
- Otogi no Machi no Rena
- Otogi Matsuri: Dark Offering
- Otogi Matsuri
- Otogimoyou Ayanishiki
- Otoko zaka
- Otoko no Isshō
- Otona ni Narumon!
- Otometeki Koi Kakumei Love Revo!!
- Otome Yōkai Zakuro
- Otome Youkai Zakuro
- Otoyomegatari
- Onaji Tsuki o Miteiru
- OniAi
- Oniichan dakedo ai sae areba kankeinai yo ne!
- Oniichan no koto nanka zenzen suki janain dakara ne!!
- Oniichan no hanabi
- Onidere
- Onihime VS
- Onihei Hankachō
- Oneechan ga Kita
- Onegai Twins
- Onegai☆Twins
- Ohime-sama Navigation
- Omae wa Mada Gunma o Shiranai
- Omukae desu
- Only Yesterday
- Omo ni naitemasu
- Oyasumi Punpun
- Oraa Guzura Dado
- Oruchuban Ebichu
- Orfina
- Ore ore
- Ore ga ojō-sama gakkō ni "shomin sample" toshite rachirareta ken
- Oretachi ni Asu wa Naissu
- Oretachi ni Tsubasa wa Nai
- Ore wa Teppei
- Ore wa mada honki dashitenai dake
- Ore Monogatari!!
- Orange Planet
- Orenchi no furo jijō
- Owari no Seraph
- Onsen Yōsei Hakone-chan
- Onmyō Taisenki
- On'yado Kawasemi
- Otherworld Barbara
- Occhio di Falco
- Ojo de Halcón
- Oh, poveri noi! - Tutti a casa Kawai
- Ossa - Stand by Me, My Dear
- Otakus in Love
- Okashina Okashina Anoko
- Occult Academy
- Outlaw Star
- Oscuri Vendicatori
- Oscuri X-Men
- Over Drive Girl 1/6
- Otaku Teacher
- Ossu! Kaette kita Son Gokū to nakamatachi!!
- Ogni nostro venerdì
- Our Home's Fox Deity
- Osake wa Fūfu ni Natte kara
- Overlord
- Oroka na Tenshi wa Akuma to Odoru
- Oi! Tonbo
- Outburst Dreamer Boys
- Our Precious Conversations
- O Maidens in Your Savage Season
- Oda Cinnamon Nobunaga
- Oshi ga Budōkan Ittekuretara Shinu
- Okoshiyasu, Chitose-chan
- One Room of Happiness
- Oresuki
- Ore o suki na no wa omae dake ka yo
- Oresuki: Are You The Only One Who Loves Me?
- Ore wo Suki Nano wa Omae Dake ka yo
- Our Dreams at Dusk
- Oltre le onde - Shimanami tasogare
- Ojisama to neko
- Otome Game no Hametsu Flag Shika Nai Akuyaku Reijō ni Tensei Shiteshimatta…
- Onimai
- Onii-chan wa oshimai!
- Onimai: I'm Now Your Sister!
- Olympia Kyklos
- Ore ga Suki nano wa Imōto dakedo Imōto ja nai
- Otherside Picnic
- Orient
- ORIENT 東方少年
- Orient - Samurai Quest
- Okashi na Tensei
- Otto no chinpo ga hairanai
- Oblivion Battery
- Our Last Crusade or the Rise of a New World
- Ore dake Haireru Kakushi Dungeon: Kossori Kitaete Sekai Saikyou
- Onsen Musume
- Ossan's Love
- Ojō to Banken-kun
- Ojo to Banken-kun
- Otome Game Sekai wa Mob ni Kibishii Sekai desu
- Otomegē Sekai wa Mobu ni Kibishii Sekai Desu
- One Night Morning
- Otaku Elf
- Otonanajimi
- Oh, Suddenly Egyptian God
- Osamake
- Osananajimi ga Zettai ni Makenai Love Comedy
- Okinawa de Suki ni Natta Ko ga Hōgen Sugite Tsurasugiru
- Okaeri Alice
- Oshi no Ko
- Oshi no ko - My Star
- Otonari ni Ginga
- Orb: On the Movements of the Earth
- Odd Taxi
- Onna no Sono no Hoshi
- One Room, Hi Atari Futsū, Tenshi Tsuki.
- Ore, Tsushima
- Otonari no Tenshi-sama ni Itsu no Ma ni ka Dame Ningen ni Sareteita Ken
- Our Dating Story: The Experienced You and The Inexperienced Me
- One Piece Film: Red
- Once upon a Crime