Proxy Shopping Series Beginning with O
- [Oshi no ko]
- My Next Life as a Villainess: All Routes Lead to Doom!
- Obey Me!
- Occultic;Nine
- OCTOPATH TRAVELER
- Odd Taxi
- Odoru Daisosasen Series
- Ojamajo
- Okaeri Mone
- Okami Kakushi
- Okami to Koshinryo (Wolf and Spice)
- Omoi, Omoware, Furi, Furare
- One Piece
- One Punch Man
- Onegai My Melody
- Onegai Teacher (Please Teacher!)
- Onimai: I'm Now Your Sister!
- Onimusha
- Online Game
- Onna Joshu Naotora
- Onosaka, Konishi no O+K(OTASUKE)
- Ooya-san wa Shishunki !
- Ore no Imoto ga Kon nani Kawaii wake ga nai
- Ore o Suki nano wa Omae dake kayo
- Orenchi no Furo Jijyo
- Oshi ga Budokan Ittekuretara Shinu
- Osomatsu-san
- Otaku Elf
- Otaku ni Koi wa Muzukashii
- Otoko wa Tsuraiyo
- Otome wa Boku ni Koishiteru
- Ouran Koko Host Club
- Overlord
- Please Tell Me! Galko-chan
- Seraph of the End