- Ojisan and Marshmallow Episode 13: Hige-san and Marshmallow
- Ojisan in Another World
- Okaimono Panda!
- Okama Report
- Okami-San and Her Seven Companions
- Okashi na Sabaku no Suna to Manu
- Okitsura: Fell in Love with an Okinawan Girl, but I Just Wish I Know What She's Saying
- Okko's Inn
- Okko's Inn
- Okoshiyasu, Chitose-chan
- Okoshiyasu, Chitose-chan Recaps
- Okubyou na Venus
- OL Kaizou Kouza
- Omamori Himari
- Omoi no Kakera
- On A Paper Crane: Tomoko's Adventure
- On The Edge
- On The Edge Season 2
- On The Edge Season 3
- On-Gaku: Our Sound
- Onara Goro
- Once Upon A Time
- Once Upon a Witch's Death
- One Hundred Thousand Years of Qi Refining
- One Off
- One Outs
- One Piece
- One Piece - Wano Kuni SP
- One Piece 3D: Gekisou! Trap Coaster
- One Piece 3D: Strawhat Chase
- One Piece 3D2Y: 15th Anniversary
- One Piece Egghead Arc Recap
- One Piece Fan Letter
- ONE PIECE FILM GOLD 〜episode 0〜
- One Piece Film: Red
- One Piece Film: Strong World Episode 0
- One Piece Log: Fish-Man Island Saga
- One Piece Movie 1
- One Piece Movie 7: Karakuri-jou no Mecha Kyohei
- One Piece Movie 9: Episode of Chopper Plus - Fuyu ni Saku, Kiseki no Sakura
- One Piece Recap
- One Piece Special: Adventure in the Ocean's Navel
- One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream!
- One Piece Special: Protect! The Last Great Performance
- One Piece Special: The Detective Memoirs of Chief Straw Hat Luffy
- One Piece: A Comprehensive Anatomy! The Legend of Kozuki Oden!
- One Piece: A Project to Fully Enjoy! `Surgeon of Death` Trafalgar Law
- One Piece: Adventure of Nebulandia
- One Piece: Baron Omatsuri and the Secret Island
- One Piece: Barto's Secret Room
- One Piece: Chopper Kingdom of Strange Animal Island
- One Piece: Clockwork Island Adventure
- One Piece: Dead End
- One Piece: Defeat the Pirate Ganzack!
- One Piece: Django's Dance Carnival
- One Piece: Dr. Chopper's Adventure Checkup - Good Friends at a Crossroad
- One Piece: Dr. Chopper's Adventure Checkup - The Ballad of a Father and Daughter
- One Piece: Dr. Chopper's Adventure Checkup - The Proud Dream of the Giants
- One Piece: Episode of East Blue
- One Piece: Episode of Luffy - Hand Island Adventure
- One Piece: Episode of Merry - The Tale of One More Friend
- One Piece: Episode of Nami - Tears of a Navigator and the Bonds of Friends
- One Piece: Episode of Sabo - The Three Brothers' Bond
- One Piece: Episode of Skypiea
- One Piece: Glorious Island
- One Piece: Heart of Gold
- One Piece: Making History! The Turbulent Old and New Four Emperors!
- One Piece: Recapping Fierce Fights! The Countercharge Alliance vs. Big Mom
- One Piece: Recapping Fierce Fights! Zoro vs. a Lead Performer!
- One Piece: Romance Dawn Story
- One Piece: Soccer King of Dreams
- One Piece: Take Aim! The Pirate Baseball King
- One Piece: The Curse of the Sacred Sword
- One Piece: The Log of the Rivalry! The Straw Hats vs. Cipher Pol
- One Piece: The Log of the Turbulent Revolution - The Revolutionary Army Maneuvers in Secret!
- One Piece: The Movie 10 - Strong World
- One Piece: The Movie 12 - Film Z
- One Piece: The Movie 13 - Film: Gold
- One Piece: The Movie 14 - Stampede
- One Piece: The Movie 8 - Adventures in Alabasta
- One Piece: Unwavering Justice! The Navy's Proud Log!
- One Pound Gospel
- One Punch Man
- One Punch Man 2nd Season
- One Punch Man 2nd Season Commemorative Special
- One Punch Man 2nd Season Specials
- One Punch Man 3: Specials
- One Punch Man Specials
- One Punch Man: Road to Hero
- One Room
- One Room Second Season
- One Room Second Season Special
- One Room Third Season
- One Step Toward Freedom
- One Way or Another
- One Week Friends
- One-Million Year Trip: Bander Book
- One-Punch Man Season 3
- One: Kagayaku Kisetsu e
- Oneechan ga Kita
- Onegai My Melody
- Onegai My Melody Sukkiri♪
- Onegai My Melody: Kuru Kuru Shuffle!
- OniAi
- OniAi Specials
- Onigiri
- Onimai: I'm Now Your Sister!
- Onimai: I'm Now Your Sister! (Uncensored)
- Onimomomomo
- Onimusha
- Onipan!
- Only Yesterday
- Onmyo Kaiten Re:Birth Verse
- Onmyouji
- Onyankopon
- Ōoku: The Inner Chambers
- Oomuro-ke: Dear Friends
- Oomuro-ke: Dear Sisters
- Ooya-san wa Shishunki!
- Operation Han-Gyaku-Sei Million Arthur
- Operation Han-Gyaku-Sei Million Arthur 2nd Season
- Opus.COLORs
- Orange
- Orange: Mirai
- Ore ga Ojousama Gakkou ni "Shomin Sample" Toshite Gets♥Sareta Ken Specials
- Ore ga Suki nano wa Imouto dakedo Imouto ja Nai Specials
- Ore no Nounai Sentakushi ga, Gakuen Love Comedy wo Zenryoku de Jama Shiteiru OVA
- Ore no Sora Keiji-hen
- Ore wo Suki nano wa Omae dake ka yo: Oretachi no Game Set
- Oreca Battle
- Orenchi no Furo Jijou
- Oreshura
- ORESUKI Are you the only one who loves me: Game Over
- ORESUKI Are you the only one who loves me?
- Orient
- Orient Part 2
