Lista e anime: O

• Obake no Holly
• Obake no Q-Taro (1965)
• Obake no Q-Taro (1971)
• Obake no Q-Taro (1985)
• Ōban Star Racers
• Obocchama-kun
• Ocha-ken ~Chokotto no Gatari~ (2003)
• Ocha-ken ~Ri Kotto no Gatari~ (2006)
• Occhi di Gatto (early episodes)
• Occhi di Gatto (later episodes)
• Occhio ai fantasmi!
• Ochamegami Monogatari Kolokolo Polon
• Ochame-na Futago -Clare Gakuin Monogatari-
• O Czym Szumia Wierzby
• Odysseus 31
• Offside
• Ogon Bat
• Ogon Senshi Gold Lightan
• Ogon Yuusha Goldran
• Ohayo! Spank
• Oh Dorobo Jing
• Oh! Family
• Oh! My Kosobu
• Oh! My Goddess (1998)
• Oh! My Goddess (2005)
• Oh My Goddess!
• Oh! Super Milk-chan
• Oideyo! Henamon Sekai Kasumin (2001)
• Oideyo! Henamon Sekai Kasumin (2002)
• Oi! Ryoma
• Oishinbo
• Oja-majo Doremi (1999)
• Oja-majo Doremi # (2000)
• Oja-majo Doremi Dokkaan (2002)
• Ojamajo Doremi Na-i-sho (2004)
• Ojamanga Yamada-kun
• Ojarumaru (1998)
• Ojarumaru (1999)
• Ojarumaru (2000)
• Ojarumaru (2001)
• Ojarumaru (2002)
• Ojarumaru (2003)
• Ojarumaru (2004)
• Ojarumaru (2005)
• Okami Shonen Ken
• Okawari Boy Starzan-S
• Okusama wa Joshikôsei
• Okusama wa Mahou Shoujo
• Olive et Tom
• Omakase Scrappers
• Omishi Mahou Gekijou Risky Safety
• Onbu Obake
• Onegai My Melody
• Onegai My Melody ~Kuru Kuru Shuffle!~
• Onegai Samia Don
• Onegai Teacher
• Onegai Twins
• One Piece
• Oniisama E ...
• Only You Viva! Kabakura
• Onmyou Taisenki
• Opowiesci z Palmowego Miasteczka
• Oraa Guzura Dado (1967)
• Oraa Guzura Dado (1987)
• Ordy et les Grandes Découvertes
• Ore wa Chokkaku
• Ore wa Teppei
• Orguss
• Oroshitate Musical Nerima Daikon Brothers
• Oruchuban Ebichu
• Osomatsu-kun (1966)
• Osomatsu-kun (1988)
• Otogi Jushi Akazukin
• Otogi Manga Calendar
• Otogi Story Tenshi no Shippo
• Otogi Zoushi
• Otoko do Aho! Koshien
• Otoko Ippiki Gakidaisho
• Otome wa Boku ni Koishiteru
• Ouran Koukou Host Club
• Ouran High School Host Club
• Outlaw Star
• OVERMAN King Gainer
• Ox Tales
• Oyayubi Hime Monogatari
• Oyoneko Bunyan
• Oz no Mahoutsukai
• Oz no Uchu Daiboken