| A.T.O.M. | August 27, 2005 | Jetix | 52 |
| A3! | January 13, 2020 | — | — |
| Aaahh!!! Real Monsters | October 29, 1994 | Nickelodeon | 52 |
| Aah! Harimanada | April 23, 1992 | — | 23 |
| Abby Hatcher | December 25, 2018 | Nickelodeon | 52 |
| ABC with Kenny G | — | — | — |
| ABCiee Working Diary | January 7, 2021 | Asahi Television Broadcasting Corporation | — |
| Abominable and the Invisible City | — | — | — |
| About Dima | — | — | — |
| Abraca | December 19, 2019 | Okoo | 26 |
| Absolute Boy | May 21, 2005 | NHK Satellite 2 Television | 26 |
| Absolute Duo | January 4, 2015 | — | 12 |
| ACCA: 13-Territory Inspection Dept. | January 10, 2017 | — | 12 |
| Accel World | April 7, 2012 | — | 24 |
| Ace Attorney | April 2, 2016 | Nippon Television Keiretsu | 47 |
| Ace o Nerae! 2 | July 25, 1988 | — | 13 |
| Ace o Nerae! Final Stage | October 23, 1989 | — | 12 |
| Ace of Diamond | October 6, 2013 | TV Tokyo | 126 |
| Ace of Diamond Act II | April 2, 2019 | TV Tokyo | 52 |
| Ace Ventura: Pet Detective | December 9, 1995 | CBS | 39 |
| Achille Talon | 1963 | — | — |
| Acro Trip | October 2, 2024 | — | 12 |
| Acrobunch | May 5, 1982 | Nippon Television | 24 |
| Action Heroine Cheer Fruits | July 7, 2017 | — | 12 |
| Action League Now! | October 14, 1995 | Nickelodeon | 65 |
| Action Monster Big Movie | April 24, 2026 | Bilibili | — |
| Action Pack | January 4, 2022 | Netflix | 17 |
| Active Raid | January 7, 2016 | — | 24 |
| Actors: Songs Connection | October 6, 2019 | — | 12 |
| Ada Twist, Scientist | September 28, 2021 | Netflix | 41 |
| Adachi and Shimamura | October 9, 2020 | — | 12 |
| Adiboo Adventure : Inside the Human Body | — | France 5 | 40 |
| Adit Sopo Jarwo | — | GTV, Trans TV, MNCTV | 40 |
| Adrian | January 21, 2019 | Canale 5 | 9 |
| Adventure Kid | — | — | — |
| Adventure Time | April 5, 2010 | Nicktoons, Cartoon Network, Cartoon Network | 278 |
| Adventure Time: Fionna and Cake | August 31, 2023 | HBO Max | 20 |
| Adventure Time: Side Quests | June 29, 2026 | Hulu, Disney+ | — |
| Adventurer Carly | — | Golden Eagle Cartoon | 104 |
| Adventurer Carly: Ancient Kingdom | — | — | 52 |
| Adventurers: Masters of Time | 2003 | — | 26 |
| Adventures from the Book of Virtues | September 2, 1996 | PBS Kids | 39 |
| Adventures in Wonder Park | 2025 | Nickelodeon | 20 |
| Adventures of Captain Vrungel | — | Soviet Central Television | 13 |
| Adventures of Kotetsu | December 13, 1996 | — | 2 |
| Adventures of Peter and the Wolf | 2020 | — | — |
| Adventures of Pow Wow | January 30, 1949 | — | — |
| Adventures of Sonic the Hedgehog | December 3, 1993 | Broadcast syndication | 66 |
| Adventures of the Blue Knight | — | — | 13 |
| Adventures of the Little Koala | October 4, 1984 | — | 26 |
| Adventures of the Little Mermaid | 1991 | — | 26 |
| Aerover | — | MBC TV | — |
| Aesop World | April 5, 1999 | TV Tokyo | 26 |
| Aesthetica of a Rogue Hero | July 6, 2012 | — | 12 |
| African Office Worker | October 7, 2019 | — | 12 |
| Afro Samurai | January 4, 2007 | — | — |
| After School Dice Club | October 2, 2019 | — | 12 |
| After School Treasure Hunt | — | Tooniverse | — |
| After the Rain | January 12, 2018 | Fuji Television | 12 |
| After War Gundam X | April 5, 1996 | — | 39 |