| Aquaman | September 9, 1967 | CBS | 36 |
| Aquaman: King of Atlantis | 2021 | — | 3 |
| Aquarian Age: Sign for Evolution | January 4, 2002 | — | 13 |
| Aquarion Evol | January 8, 2012 | — | 26 |
| Aquarion Logos | July 2, 2015 | — | 26 |
| Aquarion: Myth of Emotions | January 10, 2025 | — | 12 |
| Arabian Knights | September 7, 1968 | NBC | 18 |
| Arabian Nights: Sinbad's Adventures | October 1, 1975 | Fuji Television | 52 |
| Araiguma Calcal-dan | April 4, 2025 | — | 12 |
| Arakawa Under the Bridge | April 4, 2010 | — | 26 |
| Arashi no Yoru ni: Himitsu no Tomodachi | April 4, 2012 | TV Tokyo | 26 |
| Arata: The Legend | April 8, 2013 | TV Tokyo | 12 |
| Arc the Lad | April 5, 1999 | WOWOW | 26 |
| Arcade Gamer Fubuki | February 25, 2002 | — | 4 |
| Arcadia of My Youth: Endless Orbit SSX | October 13, 1982 | TBS Television | — |
| Arcanadea | — | — | — |
| Arcane | November 6, 2021 | Netflix, Tencent Video | 18 |
| Archer | September 17, 2009 | FX | 145 |
| Archibald le Magi-chien | 1980 | Broadcast syndication | 46 |
| Archibald the Koala | September 4, 1998 | ITV | 52 |
| Archibald's Next Big Thing | September 6, 2019 | Netflix | 26 |
| Archie's Weird Mysteries | October 2, 1999 | Ion Television | 40 |
| Are You a Landmine, Chihara-san? | January 7, 2027 | — | — |
| Are You Lost? | July 2, 2019 | — | 12 |
| Area 88 | February 5, 1985 | — | 3 |
| Area 88 | January 8, 2004 | — | 12 |
| Argai: The Prophecy | April 15, 2001 | TF1 | 26 |
| Argento Soma | October 6, 2000 | TV Tokyo | 25 |
| Aria the Animation | October 5, 2005 | — | 13 |
| Aria the Avvenire | — | — | 3 |
| Aria the Natural | April 2, 2006 | — | 26 |
| Aria the Origination | January 8, 2008 | — | 13 |
| Aria the Scarlet Ammo | April 15, 2011 | — | 12 |
| Aria the Scarlet Ammo AA | October 6, 2015 | — | 12 |
| Ariel | June 27, 2024 | Disney Jr. | 30 |
| Ariel Deluxe | January 21, 1991 | — | 2 |
| Ariel Visual | July 21, 1989 | — | 2 |
| Arifureta | July 8, 2019 | — | 25 |
| Ariol | — | — | 137 |
| Arjun - Prince of Bali | — | — | — |
| Ark: The Animated Series | — | — | — |
| Arknights | October 28, 2022 | — | 26 |
| Armed Girl's Machiavellism | April 5, 2017 | — | 12 |
| Armitage III | 1995 | — | — |
| Armor Hunter Mellowlink | November 21, 1988 | — | 12 |
| Armor Monster | — | Youman Cartoon Television | 40 |
| Armored Adventure | — | — | — |
| Armored Fleet Dairugger XV | March 3, 1982 | TV Tokyo | 52 |
| Armored Police Metal Jack | April 8, 1991 | — | 37 |
| Armored Trooper VOTOMS | April 1, 1983 | TV Tokyo | 52 |
| Armored Trooper Votoms: Pailsen Files | October 26, 2007 | — | — |
| Around the World in 79 Days | September 6, 1969 | — | 17 |
| Around the World in 80 Days | September 9, 1972 | NBC, ABC Entertains | 16 |
| Around the World with Willy Fog | January 8, 1984 | La 1 | 26 |
| ARP Backstage Pass | January 13, 2020 | — | — |
| Arpeggio of Blue Steel -Ars Nova- | October 8, 2013 | — | 12 |
| Arrow Emblem: Hawk of the Grand Prix | September 22, 1977 | Fuji Television | 44 |
| Art Odyssey | — | Korea Educational Broadcasting System | 52 |
| Arte | April 4, 2020 | — | 12 |
| Arthur | October 7, 1996 | PBS | 253 |