Figures Series Beginning with O
- [Oshi no ko]
- My Next Life as a Villainess: All Routes Lead to Doom!
- Occultic;Nine
- Ochikobore Fruits Tarte
- Oda Nobuna no Yabou
- Odoru Daisosasen Series
- Ojamajo
- Okami to Koshinryo (Wolf and Spice)
- Okusama wa Maho Shojo
- Omamori Himari
- One Off
- One Piece
- One Punch Man
- Onegai My Melody
- Onegai Teacher (Please Teacher!)
- Onegai Twins
- ONGEKI
- Onichan Dakedo Ai Sae Areba Kankeinaiyone
- Onigamiden
- Onimai: I'm Now Your Sister!
- Online Game
- Ookami kodomo no Ame to Yuki (Wolf Children)
- Ookami-san Series
- Opanchu Usagi
- Ore no Imoto ga Kon nani Kawaii wake ga nai
- Ore no Kanojo to Osananajimi ga Shuraba Sugiru
- Ore o Suki nano wa Omae dake kayo
- Ore, Twintail ni Narimasu.
- Orix Buffaloes
- Osama Ranking
- Osananajimi ga zettai ni makenai love-come
- Oshi ga Budokan Ittekuretara Shinu
- Osomatsu-san
- Otome wa Boku ni Koishiteru
- Otome Yokai Zakuro
- Ouran Koko Host Club
- Overlord
- Overman King-Gainer
- Ozuma
- Please Tell Me! Galko-chan
- Seraph of the End
- Uncle from Another World