| Ah My Buddha | July 1, 2005 | — | 24 |
| Aharen-san Is Indecipherable | April 1, 2022 | — | 12 |
| Ahiru no Sora | October 2, 2019 | — | 50 |
| Aho-Girl | July 4, 2017 | — | 12 |
| Ai no Gakko Cuore Monogatari | April 3, 1981 | — | 26 |
| AI no Idenshi | July 8, 2023 | — | 12 |
| Ai no Kusabi | August 1, 1992 | — | 2 |
| Ai no Kusabi | January 18, 2012 | — | 4 |
| Ai Tenchi Muyo! | 2014 | — | — |
| Ai Yori Aoshi | April 10, 2002 | — | 36 |
| Ai-Mai-Mi | January 3, 2013 | — | 13 |
| Ai-Mai-Mi: Mousou Catastrophe | July 8, 2014 | — | 12 |
| Ai-Mai-Mi: Surgical Friends | January 3, 2017 | — | 12 |
| Aikatsu Friends! | April 5, 2018 | — | 76 |
| Aikatsu Stars! | April 7, 2016 | — | 100 |
| Aikatsu! | October 8, 2012 | TV Tokyo | 178 |
| Aim for the Ace! | October 5, 1973 | — | 26 |
| Air | January 6, 2005 | — | 13 |
| Air Gear | April 4, 2006 | TV Tokyo | 25 |
| Air Gear: Break on the Sky | November 17, 2010 | — | 3 |
| Air Master | April 2, 2003 | — | 27 |
| Aishite Knight | March 1, 1983 | TV Asahi | 42 |
| Aishiteruze Baby | April 3, 2004 | — | 26 |
| Aiura | April 10, 2013 | — | 12 |
| Ajimu: Kaigan Monogatari | June 15, 2001 | — | 4 |
| 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 Maniax | November 25, 2004 | — | 3 |
| 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 |
| Akazukin Chacha | December 6, 1995 | — | 3 |
| 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 |
| Alfred J. Kwak | December 24, 1989 | VARA | 54 |
| 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 | — |
| Alien Nine | June 25, 2001 | — | 4 |