Character Goods Series
- ALL OUT!!
- Always 3 chome no Yuhi
- Obey Me!
- Occultic;Nine
- OCTOPATH TRAVELER
- Opus.COLORs
- orange
- OZMAFIA!!
- [Oshi no ko]
- Okami Kakushi
- Ookami kodomo no Ame to Yuki (Wolf Children)
- Okiku Furikabutte
- Okasan to Issho
- Treat of Reincarnation
- Curious George
- Touch Detective Mushroom Garden
- Please Tell Me! Galko-chan
- Oshiri Tantei
- Ojisan Ha Kawai I Mono Ga Osuki.
- Ojarumaru
- Osomatsu-san
- Ochikobore Fruits Tarte
- Odekake Kozame
- A Galaxy Next Door
- Otome Yokai Zakuro
- Onipan!
- Onegai Twins
- Onegai Teacher (Please Teacher!)
- Onegai My Melody
- Opanchu Usagi
- Ohitori sama
- Omamori Himari
- Only Yesterday
- Oyasumi Punpun
- Ojamajo
- Onichan Dakedo Ai Sae Areba Kankeinaiyone
- Onimai: I'm Now Your Sister!
- Omae wa mada Gunma wo shiranai
- Otenki Sentai How Weather
- A Girl & Her Guard Dog
- The Angel Next Door Spoils Me Rotten
- Ookami-san Series
- Okami Shojo to Kuro Oji
- Ozuma
- The Diary of Ochibi-san
- Odd Taxi
- Orient
- Orix Buffaloes
- Olympia Cuculus
- Hortensia Saga
- Orenchi no Furo Jijyo
- ONGEKI
- Online Game
- Overtake!
- Overlord
- Otome wa Boku ni Koishiteru
- My Next Life as a Villainess: All Routes Lead to Doom!
- Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs
- Otobun
- Ore, Tsushima
- Ore, Twintail ni Narimasu.
- Shomin Sample
- Ore Ga Sukina No Ha Imotodakedo Imoto Janai
- Oretachin ni Tsubasa wa Nai
- Oretachi no Moe Sleeve
- Oretachi Majikou Destroy
- Solo Leveling
- Special training in the Secret Dungeon
- Ore no Imoto ga Kon nani Kawaii wake ga nai
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Ore no nonai sentakushi ga gakuen Love comedy wo Zenryoku de Jyama Shiteiru
- Ore o Suki nano wa Omae dake kayo
- Ore monogatari!!
- Ooya-san wa Shishunki !
- Oyuki Umi no Kina
- Onna no ko to Misshitsu ni itara XX shichau kamoshirenai.
- Osananajimi ga zettai ni makenai love-come
- Omoide no Marnie (When Marnie Was There)
- The Foolish Angel Dances with Demons
- Okitegami Kyoko Series
- Oshi ga Budokan Ittekuretara Shinu
- My fave merchandise
- Ouran Koko Host Club
- Onsen Musume
- Onsen Yosei Hakone-Chan
- Okami to Koshinryo (Wolf and Spice)
- The Royal Tutor (Oshitsu Kyoshi Haine)
- Osama Ranking
- Royal Space Force - The Wings of Honneamise
- Seraph of the End
- Oda Shinamon Nobunaga
- Oda Nobuna no Yabou
- Oishinbo
- Ongaku Shojo
- Onigiri