- One Way or Another
- Okitsura: Fell in Love with an Okinawan Girl, but I Just Wish I Know What She's Saying
- One Piece Film: Red
- One Piece: Episode of Skypiea
- One Piece: Dr. Chopper's Adventure Checkup - The Ballad of a Father and Daughter
- Operation Han-Gyaku-Sei Million Arthur
- One-Million Year Trip: Bander Book
- Ogre Slayer
- Oshi No Ko Season 2
- Obsolete
- Oda Cinnamon Nobunaga
- Oban Star-Racers
- Ogami Matsugorou
- Obey Me!
- Ohayou! Spank (Movie)
- Odd Taxi Movie: In the Woods
- Obey Me! 2nd Season
- Oam Monogatari: Sono Natsu, Watashi ga Shitta koto
- Occultic;Nine
- Ore no Sora Keiji-hen
- Odd Taxi
- Obake Zukan
- Oedo wa Nemurenai!
- Ocha-ken: Hotto Monogatari
