Series
- Onna Matsuri Series
- ALL OUT!!
- Always 3 chome no Yuhi
- Obey Me!
- Occultic;Nine
- Oceanic Moon
- OCTOPATH TRAVELER
- Oh, My Dad!!
- Ol Nippon
- OmniSheep
- on BLUE Series
- OPERA Series
- Opus.COLORs
- orange
- Otacool
- Otakara File
- Otome continue
- otona MUSE
- Over 30
- Over Drive
- OZMAFIA!!
- [Oshi no ko]
- Oishii Gohan
- Oishii Coffee no Irekata
- Oishi Propose
- Okami Kakushi
- Ookami kodomo no Ame to Yuki (Wolf Children)
- Okiku Furikabutte
- Okasan to Issho
- Okaeri Mone
- Treat of Reincarnation
- Okusama ga Seito Kaicho!
- Okoshiyasu Chitose Chan
- Curious George
- Touch Detective Mushroom Garden
- Please Tell Me! Galko-chan
- Oshiri Tantei
- Ojiisan Sensei
- Ojisan to Marshmallow
- Ojisan Ha Kawai I Mono Ga Osuki.
- Ojarumaru
- Osen
- Osomatsu-san
- Ochikobore Fruits Tarte
- Ochoyan
- Ossan's Love
- Odekake Kozame
- Otogi Jushi Akazukin
- Otona no Natsuyasumi
- Otona no Boguya-san
- A Galaxy Next Door
- Otome Yokai Zakuro
- Onipan!
- Onegai Twins
- Onegai Teacher (Please Teacher!)
- Onegai My Melody
- Opanchu Usagi
- Ohisama
- Ohitori sama
- Omae Umasodana
- Omamori Himari
- Omiyasan
- Only Yesterday
- Oyasumi Punpun
- Ontama!
- Onna Joshu Naotora
- Ojamajo
- Otome-San
- Oi! Hanimaru
- Oshigoto Danshi
- Onichan Dakedo Ai Sae Areba Kankeinaiyone
- Oni-Chan no Koto Nanka Zenzen Sukijanaindakarane!!
- Onimai: I'm Now Your Sister!
- Omae wa mada Gunma wo shiranai
- Otenki One-san
- Otenki Sentai How Weather
- Oneechan ga Kita
- My Fair Lady
- A Girl & Her Guard Dog
- Oka-san Musume wo Yameteiidesuka?
- Owarai Danshiko
- Otosan to Yobasete
- Omukaedesu.
- Osake wa Fufu ni Nattekara
- Okane ga Nai!
- The Angel Next Door Spoils Me Rotten
- Okami San Ha Taberaretai
- Ookami-san Series
- Okami Shojo to Kuro Oji
- Octave
- Ojisama Senka
- Ozuma
- The Diary of Ochibi-san
- Odd Taxi
- Otoca Doll
- Otoko no Kosodate
- Otona na Kanojo.
- Otona Anime
- Otona Joshi
- Otona Koukou