- Okusama wa Mahou Shoujo
- Oneechan ga Kita
- One Piece: Dai Tokushuu! Momonosuke no Mei Shougun e no Michi
- Onegai My Melody
- Okashi na Tensei
- One Piece 3D2Y: Ace no shi wo Koete! Luffy Nakama Tono Chikai
- One Punch Man 2nd Season Commemorative Special
- Omamori Himari
- One Piece: Dai Tannou Kikaku! "Shi no Gekai" Trafalgar Law
- One Piece Movie 06: Omatsuri Danshaku to Himitsu no Shima
- One Punch Man Specials
- One Piece Movie 04: Dead End no Bouken
- One Piece: Taose! Kaizoku Ganzack
- One Piece Movie 08: Episode of Alabasta - Sabaku no Oujo to Kaizoku-tachi
- One Piece: Dai Tettei Kaibou! Gekitou! 5-nin no Shin Sedai
- One Punch Man: Road to Hero
- One Outs
- One Piece Film: Red
- One Room Special
- One Off
- Okusama ga Seitokaichou!
- Omae wa Mada Gunma wo Shiranai
- One Piece: Episode of Merry - Mou Hitori no Nakama no Monogatari
- One Piece: Dai Gekisen Tokushuu! Mugiwara no Ichimi vs. Tobi Roppou
- One Piece: Episode of Nami - Koukaishi no Namida to Nakama no Kizuna
- One Piece Movie 07: Karakuri-jou no Mecha Kyohei
- One Punch Man
- One Piece: Episode of Sabo - 3 Kyoudai no Kizuna Kiseki no Saikai to Uketsugareru Ishi
- Onara Gorou
- One Piece Film: Strong World
- Omoi no Kakera
- One Piece 3D: Mugiwara Chase
- Ongaku Shoujo
- Onna Senshi Efe & Jira: Gude no Monshou
- One Room: Third Season
- Onsen Yousei Hakone-chan
- Oniichan dakedo Ai sae Areba Kankeinai yo ne! Specials
- Onmyou Taisenki
- Ookami to Koushinryou II: Ookami to Kohakuiro no Yuuutsu
- Omoide Poroporo
- Onegai☆Teacher
- Oomuro-ke: Dear Sisters
- Onigiri
- Ookiku Furikabutte
- Ontama!
- Ookami Shoujo to Kuro Ouji: Gishinanki – Happening Kiss
- Ongaku Shoujo (TV)
- Onipan!
- Onyankopon
- Oniichan no Koto nanka Zenzen Suki ja Nai n da kara ne!!
