| Kyūmei Senshi Nanosaver | — | — | — |
| Kämpfer | October 2, 2009 | TBS Television | 12 |
| Kämpfer für die Liebe | April 8, 2011 | — | 2 |
| Kōchū Ōja Mushiking: Mori no Tami no Densetsu | April 6, 2005 | — | — |
| Kōpen-chan | April 6, 2025 | — | — |
| Kōtetsu Sangokushi | April 5, 2007 | TV Tokyo | 25 |
| Kōtetsushin Jeeg | April 5, 2007 | WOWOW | 13 |
| Kōya no Shōnen Isamu | April 4, 1973 | Fuji Television | 52 |
| Kūchū Buranko | October 16, 2009 | Fuji Television | — |
| L/R: Licensed by Royalty | January 9, 2003 | — | 12 |
| La Corda d'Oro | October 1, 2006 | TV Tokyo, Nippon Television | 25 |
| La Seine no Hoshi | April 4, 1975 | Fuji Television | 39 |
| La storia della Arcana Famiglia | July 1, 2012 | — | 12 |
| Ladies versus Butlers! | January 5, 2010 | AT-X | 12 |
| Lady Georgie | April 9, 1983 | — | 45 |
| Lady Jewelpet | April 5, 2009 | — | 52 |
| Lady Lady!! | October 21, 1987 | TBS Television | 21 |
| Ladyspo | April 10, 2018 | — | — |
| Lagrange: The Flower of Rin-ne | January 8, 2012 | — | 24 |
| Laid-Back Camp | January 4, 2018 | — | 37 |
| Lalabel, the Magical Girl | February 15, 1980 | — | 49 |
| Lamune | October 11, 2005 | — | 12 |
| Lance N' Masques | October 1, 2015 | — | 12 |
| Land of the Lustrous | October 7, 2017 | — | 12 |
| Lapis Re:Lights | July 4, 2020 | — | 12 |
| Last Exile | April 8, 2003 | TV Tokyo | 26 |
| Last Exile: Fam, the Silver Wing | October 15, 2011 | — | 21 |
| Last Hope | April 4, 2018 | — | — |
| Last Period | April 12, 2018 | — | 12 |
| Laughing Under the Clouds | October 4, 2014 | — | 12 |
| Laura, The Prairie Girl | October 7, 1975 | TBS Television | 26 |
| Layton Mystery Detective Agency: Kat's Mystery-Solving Files | April 8, 2018 | Fuji Television | 50 |
| Lazarus | April 6, 2025 | Animax, TV Tokyo, TX Network | 13 |
| Le Chevalier D'Eon | August 19, 2006 | WOWOW | 24 |
| Legend of Basara | April 2, 1998 | Sun Television | 13 |
| Legend of DUO | October 27, 2004 | — | 12 |
| Legend of Heavenly Sphere Shurato | April 6, 1989 | — | 38 |
| Legend of Himiko | January 7, 1999 | TV Tokyo | 12 |
| Legend of Mana: The Teardrop Crystal | October 8, 2022 | — | 12 |
| Legend of the Galactic Heroes: Die Neue These | March 31, 2018 | — | — |
| Legendary Gambler Tetsuya | October 7, 2000 | TV Asahi | 20 |
| Legends of the Dark King | October 10, 2008 | — | 13 |
| Legendz | April 4, 2004 | Fuji Television | — |
| Lemon Angel Project | March 31, 2006 | — | 13 |
| Les Misérables: Shōjo Cosette | January 7, 2007 | — | 52 |
| Let This Grieving Soul Retire! | October 2, 2024 | — | 13 |
| Let's Dance with Papa | July 6, 1999 | TBS Television | 16 |
| Let's Go Kaikigumi | July 5, 2026 | — | 12 |
| Let's Go Karaoke! | July 24, 2025 | — | — |
| Let's Make a Mug Too | April 3, 2021 | — | 24 |
| Let's Nupu Nupu | October 7, 1998 | TBS Television | 16 |
| Let's Play | October 2, 2025 | — | 12 |
| Let’s Go Quintuplets! | April 14, 2001 | TBS Television | 50 |
| Level 1 Demon Lord and One Room Hero | July 3, 2023 | — | 12 |
| Level E | January 11, 2011 | — | 13 |
| Leviathan: The Last Defense | April 6, 2013 | — | 13 |
| Levius | November 28, 2019 | — | — |
| Li'l Miss Vampire Can't Suck Right | October 12, 2025 | — | 12 |
| Liar Game | April 7, 2026 | — | 26 |
| Liar Liar | July 8, 2023 | — | 12 |