| Aishite Knight | March 1, 1983 | TV Asahi | 42 |
| Aishiteruze Baby | April 3, 2004 | — | 26 |
| Aiura | April 10, 2013 | — | 12 |
| Ajin | January 16, 2016 | — | 26 |
| Akadō Suzunosuke | April 5, 1972 | — | 52 |
| Akagi | October 4, 2005 | Nippon Television | 26 |
| Akahori Gedou Hour Rabuge | July 5, 2005 | — | 13 |
| Akakichi no Eleven | April 13, 1970 | Nippon Television | 52 |
| Akame ga Kill! | July 7, 2014 | — | 24 |
| Akane-banashi | April 4, 2026 | — | — |
| Akane-chan | April 4, 1968 | Fuji Television | 26 |
| Akaneiro ni Somaru Saka | October 2, 2008 | — | 12 |
| Akashic Records of Bastard Magical Instructor | April 4, 2017 | — | — |
| Akazukin Chacha | January 7, 1994 | TV Tokyo | 74 |
| AKB0048 | April 29, 2012 | — | 26 |
| Akebi's Sailor Uniform | January 9, 2022 | — | 12 |
| Akiba Maid War | October 7, 2022 | — | 12 |
| Akiba's Trip: The Animation | January 4, 2017 | — | 13 |
| Akiba-chan | July 25, 2008 | Kids Station | 10 |
| Akikan! | January 3, 2009 | — | 12 |
| Akindo Sei no Little Peso | April 3, 2017 | — | — |
| Akubi-chan | December 11, 2001 | — | 26 |
| Akubi-chan | April 2, 2006 | — | 26 |
| Akudama Drive | October 8, 2020 | — | 12 |
| Akuma kun | November 9, 2023 | — | — |
| Akuyaku Reijō no Naka no Hito | 2027 | — | — |
| Akū Daisakusen Srungle | January 21, 1983 | — | 53 |
| Alderamin on the Sky | July 9, 2016 | — | 13 |
| Aldnoah.Zero | July 6, 2014 | — | 24 |
| Alice & Zoroku | April 2, 2017 | — | 12 |
| Alice Gear Aegis Expansion | April 4, 2023 | — | 12 |
| Alice or Alice | April 4, 2018 | Tokyo MX | 12 |
| Alice SOS | April 6, 1998 | NHK Educational TV | 14 |
| Alice Tanteikyoku | April 5, 1995 | NHK Educational TV | — |
| All Out!! | October 7, 2016 | — | 25 |
| All Purpose Cultural Cat Girl Nuku Nuku | January 7, 1998 | — | 12 |
| Allison & Lillia | April 3, 2008 | NHK Satellite 2 Television | 26 |
| Alma-chan Wants to Be a Family! | October 5, 2025 | AT-X | 11 |
| Alpen Rose | April 6, 1985 | Fuji Television | 20 |
| Altair: A Record of Battles | July 7, 2017 | — | 24 |
| Always a Catch! | April 2, 2026 | — | 12 |
| Always! Super Radical Gag Family | July 6, 2014 | Tokyo MX, Sun Television, Niconico Channel | 24 |
| Alya Sometimes Hides Her Feelings in Russian | July 3, 2024 | — | 12 |
| AM Driver | April 5, 2004 | — | 51 |
| Am I Actually the Strongest? | July 2, 2023 | — | 12 |
| Amagami SS | 2010 | — | 26 |
| Amagi Brilliant Park | October 7, 2014 | Tulip Television, Tohoku Broadcasting Company, RKB Mainichi Broadcasting, BS-TBS, MBS, TBS Television, TBS Channel, CBC Television Co. | 14 |
| Amaim Warrior at the Borderline | October 5, 2021 | — | 25 |
| Amanchu! | July 8, 2016 | — | 24 |
| Amatsuki | April 4, 2008 | — | 13 |
| Ameku M.D.: Doctor Detective | January 2, 2025 | — | 12 |
| Amnesia | January 7, 2013 | — | 12 |
| An Adventurer's Daily Grind at Age 29 | January 7, 2026 | — | 12 |
| An Archdemon's Dilemma: How to Love Your Elf Bride | April 5, 2024 | — | 12 |
| An Observation Log of My Fiancée Who Calls Herself a Villainess | April 3, 2026 | — | 12 |
| And Yet The Town Moves | October 8, 2010 | — | 12 |
| And You Thought There Is Never a Girl Online? | April 7, 2016 | — | 12 |
| Andersen Monogatari | January 3, 1971 | — | — |
| Android Ana Maico 2010 | April 6, 1998 | WOWOW | 24 |
| Android Kikaider | October 16, 2000 | Kids Station | — |