Series
- Onago Series
- Ori Sta
- Orient
- Orix Buffaloes
- Olympia Cuculus
- Olympic
- Orustak Pictures
- Alternative Girls
- Hortensia Saga
- Orthros no Inu
- Ore no Koto Sukidesho
- Orenchi no Furo Jijyo
- Orange Page
- On Air Dekinai!
- ONGEKI
- Onnamichi
- Online Game
- Only Mercedes
- Oh! My Girl!!
- Ooi! Tombo
- Audio Technica
- Overtake!
- Overman King-Gainer
- Overlord
- Orphan Black
- All In
- Oh! Mickey
- Oh! Super MILK Chan
- Omo ni Naiteimasu
- 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
- Otoyome Gatari
- Otokomeshi
- 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
- Where Have My Skirts Gone?
- Ore no Imoto ga Kon nani Kawaii wake ga nai
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Ore no Sora Series
- Ore no nonai sentakushi ga gakuen Love comedy wo Zenryoku de Jyama Shiteiru
- Ore no Hanashi wa Nagai
- Ore ha Subete wo <Parry> suru
- Ore o Suki nano wa Omae dake kayo
- Ore monogatari!!
- Okami San Ha Taberaretai
- Otona no Oshare Techo
- Otona No Nurie
- Otona no Kagaku Magazine
- Oh-oku / Ooku
- Oh-oku ( Danjo Gyakuten)
- Ooya-san wa Shishunki !
- Ohoka Echizen
- Oedo Rocket
- Oyuki Umi no Kina
- Tenkuu Shinpan
- Husband's lover
- Okusama wa Toriatsukaichui
- Okusama wa Maho Shojo
- Onna Kudoki Meshi
- Onna no Sono no Hoshi
- Onna no ko to Misshitsu ni itara XX shichau kamoshirenai.
- Onna wa sore wo yurusanai
- Onna Keiji Mizuki
- Onosaka, Konishi no O+K(OTASUKE)
- Osananajimi ga zettai ni makenai love-come
- Omoi, Omoware, Furi, Furare
- Omoide no Marnie (When Marnie Was There)
- The Foolish Angel Dances with Demons
- Okitegami Kyoko Series
- Oshi ga Budokan Ittekuretara Shinu
- My fave merchandise
- Gekkan Otokomae Zukan
- Ouran Koko Host Club
- Onsen he Go!
- Onsen Musume
- Onsen Yosei Hakone-Chan
- Okami to Koshinryo (Wolf and Spice)
- KING OF BANDIT JING
- Oji No Hommei Ha Akuyaku Reijo
- Ojisama (warai) Series
- The Royal Tutor (Oshitsu Kyoshi Haine)
- Osama Game
- Osama Ranking
- Royal Space Force - The Wings of Honneamise
- Otokotachi no Yamato
- Otoko wa Tsuraiyo
- Seraph of the End
- Oda Shinamon Nobunaga
- Oda Nobuna no Yabou
- Oishinbo
- OMISHI MAGICAL THEATER: RISKY & SAFETY