| Animaniacs | November 20, 2020 | Hulu | 102 |
| Animanimals | October 12, 2013 | — | — |
| Animated Classics of Japanese Literature | April 25, 1986 | — | 32 |
| Animation Kikō: Marco Polo no Bōken | April 7, 1979 | NHK General TV | — |
| Animation x Paralympic | November 10, 2017 | — | — |
| Animator vs. Animation | June 3, 2006 | YouTube, Newgrounds, Atom.com | 14 |
| Anime Ai no Awa Awa Hour | August 1, 1999 | — | 12 |
| Anime Club | — | — | — |
| Anime Document: München e no Michi | April 23, 1972 | TBS Television | 16 |
| Anime Ganbare Goemon | October 4, 1997 | — | — |
| Anime Himitsu no Hanazono | April 19, 1991 | NHK General TV | 39 |
| Anime Kapibara-san | October 9, 2020 | — | 24 |
| Anime Shūkan DX! Mi-Pha-Pu | February 14, 1998 | TV Asahi | — |
| Anime-Gatari | — | — | — |
| Animentary: Ketsudan | April 3, 1971 | Nippon Television | 26 |
| Animerama | — | — | — |
| Anisava | — | — | — |
| Anmitsu Hime | October 5, 1986 | — | 51 |
| Anna's Tales | — | — | — |
| Anne Happy | April 7, 2016 | — | 12 |
| Anne of Green Gables | January 7, 1979 | Fuji Television | 50 |
| Anne of Green Gables: The Animated Series | September 2, 2001 | TVOKids | 26 |
| Anne Shirley | April 5, 2025 | NHK Educational TV | 24 |
| Anohana | April 14, 2011 | — | 11 |
| Anonymous Noise | April 11, 2017 | — | 12 |
| Another | January 10, 2012 | — | 12 |
| Anoyo no Subete wa, Obake-gumi! | April 7, 2020 | Chiba Television Broadcasting | 34 |
| Ant-Man | June 10, 2017 | — | 6 |
| Anti-Magic Academy: The 35th Test Platoon | October 7, 2015 | — | 12 |
| Antique Bakery | July 3, 2008 | Fuji Television | 12 |
| Any Malu Show | May 4, 2020 | Cartoon Network | — |
| Anyamaru Tantei Kiruminzuu | October 5, 2009 | TV Tokyo | 50 |
| Anyway!Anpanman | October 3, 1988 | Nippon Television | — |
| Anyway, I'm Falling in Love with You | January 10, 2025 | — | 24 |
| Ao Haru Ride | July 7, 2014 | — | 12 |
| Ao Haru Ride | August 25, 2014 | — | 2 |
| Ao Oni: The Animation | October 3, 2016 | — | — |
| Ao-chan Can't Study! | April 5, 2019 | — | 12 |
| Aoashi | April 9, 2022 | NHK Educational TV | 24 |
| Aoharu × Machinegun | July 3, 2015 | TBS Television | 12 |
| Aoi Bungaku | October 11, 2009 | — | 12 |
| Aoi Umi no Tristia | — | — | 2 |
| Aokana: Four Rhythm Across the Blue | January 12, 2016 | TV Tokyo | 12 |
| Aotu World | — | — | 112 |
| Apache Yakyūgun | October 6, 1971 | — | — |
| Ape Escape | August 3, 2008 | Nicktoons | 19 |
| Ape Escape | April 2002 | — | 76 |
| Apocalypse Bringer Mynoghra | July 6, 2025 | — | 13 |
| Apocalypse Hotel | April 9, 2025 | — | 12 |
| Apocalypse Zero | 1996 | — | — |
| Apollo Gauntlet | July 9, 2017 | Adult Swim | 6 |
| Apollo's Tall Tales | — | — | — |
| Apotheosis | November 4, 2022 | — | 156 |
| Appare-Ranman! | April 2020 | — | — |
| Apparently, Disillusioned Adventurers Will Save the World | January 10, 2023 | — | 12 |
| Apple & Onion | February 23, 2018 | Cartoon Network | 76 |
| April Showers Bring May Flowers | July 4, 2025 | — | 13 |
| Apukunapa Kutimuynin | — | — | — |
| Aqua Kids | — | — | — |
| Aqua Teen Hunger Force | December 30, 2000 | Adult Swim | 139 |