Toys Series Beginning with O
- [Oshi no ko]
- Odd Taxi
- Ojamajo
- Okami to Koshinryo (Wolf and Spice)
- Okasan to Issho
- Omoide no Marnie (When Marnie Was There)
- One Piece
- One Punch Man
- Onegai My Melody
- Onichan Dakedo Ai Sae Areba Kankeinaiyone
- Online Game
- Ookami kodomo no Ame to Yuki (Wolf Children)
- Ore no Imoto ga Kon nani Kawaii wake ga nai
- Osen
- Osomatsu-san
- Outlandar
- Overlord
- Oyasumi Punpun