| Kiba | April 2, 2006 | TV Tokyo | 51 |
| Kill la Kill | October 4, 2013 | — | 24 |
| King's Proposal | 2027 | — | — |
| Kino's Journey | April 8, 2003 | WOWOW | 13 |
| Kino's Journey: The Beautiful World - The Animated Series | October 6, 2017 | — | 12 |
| Kirby: Right Back at Ya! | October 6, 2001 | CBC Television Co. | 100 |
| Knight's & Magic | July 2, 2017 | — | 13 |
| Koi suru Tenshi Angelique | July 8, 2006 | — | — |
| KonoSuba | January 13, 2016 | Tokyo MX | 31 |
| KonoSuba: An Explosion on This Wonderful World! | April 6, 2023 | — | 12 |
| Kuma Kuma Kuma Bear | October 7, 2020 | — | 24 |
| Kunon the Sorcerer Can See | January 4, 2026 | — | 13 |
| Kurokami: The Animation | January 8, 2009 | TV Asahi | 23 |
| Kuromajo-san ga Toru!! | April 4, 2012 | NHK Educational TV | 60 |
| Kyo Kara Maoh! | April 3, 2004 | NHK Satellite 2 Television | 117 |
| Kyousougiga | October 2, 2013 | — | 10 |
| Kōchū Ōja Mushiking: Mori no Tami no Densetsu | April 6, 2005 | — | — |
| Kōtetsu Sangokushi | April 5, 2007 | TV Tokyo | 25 |
| Lady Jewelpet | April 5, 2009 | — | 52 |
| Lance N' Masques | October 1, 2015 | — | 12 |
| Land of the Lustrous | October 7, 2017 | — | 12 |
| Last Exile | April 8, 2003 | TV Tokyo | 26 |
| Legend of Himiko | January 7, 1999 | TV Tokyo | 12 |
| Legends of the Dark King | October 10, 2008 | — | 13 |
| Legendz | April 4, 2004 | Fuji Television | — |
| Let This Grieving Soul Retire! | October 2, 2024 | — | 13 |
| Let’s Go Quintuplets! | April 14, 2001 | TBS Television | 50 |
| Level 1 Demon Lord and One Room Hero | July 3, 2023 | — | 12 |
| Leviathan: The Last Defense | April 6, 2013 | — | 13 |
| Life with an Ordinary Guy Who Reincarnated into a Total Fantasy Knockout | January 12, 2022 | — | 12 |
| Lilpri | April 4, 2010 | TV Tokyo | 51 |
| Little Busters! | October 6, 2012 | — | 39 |
| Little Memole | March 3, 1984 | TV Asahi | 50 |
| Little Pollon | May 8, 1982 | Fuji Television | 46 |
| Living for the Day After Tomorrow | October 5, 2006 | — | 12 |
| Loner Life in Another World | October 4, 2024 | — | 12 |
| Lord Marksman and Vanadis | October 4, 2014 | — | 13 |
| Lucifer and the Biscuit Hammer | July 9, 2022 | — | 24 |
| Maburaho | October 14, 2003 | WOWOW | 24 |
| Made in Abyss | July 7, 2017 | — | 13 |
| Magi: The Labyrinth of Magic | October 6, 2012 | — | 50 |
| Magic Knight Rayearth | October 17, 1994 | Yomiuri Telecasting Corporation | 49 |
| Magical Circle Guru Guru | July 11, 2017 | — | 24 |
| Magical Circle Guru Guru | October 13, 1994 | — | 45 |
| Magical Girl Lyrical Nanoha Strikers | — | — | — |
| Magical Girl Ore | April 2, 2018 | — | 12 |
| Magical Meow Meow Taruto | July 5, 2001 | — | 12 |
| Magical Play | November 16, 2001 | — | 24 |
| Magical Shopping Arcade Abenobashi | April 4, 2002 | — | 13 |
| Magical Taluluto | September 2, 1990 | — | 87 |
| Magical Warfare | January 9, 2014 | — | 12 |
| Magician's Academy | October 6, 2008 | — | 12 |
| Magikano | January 3, 2006 | — | 13 |
| Magimoji Rurumo | July 9, 2014 | Tokyo MX | 12 |
| Maiden Blood | 2027 | — | — |
| Majutsu o Kiwamete Tabi ni Deta Tensei Elf, Moteamashita Jumyō de Ikeru Densetsu to Naru | January 2027 | — | — |
| Makai Senki Disgaea | April 4, 2006 | — | — |
| Malevolent Spirits | January 10, 2023 | — | — |
| Mama is Just a Fourth Grade Pupil | January 10, 1992 | Nippon Television | 51 |
| Mami the Psychic | April 7, 1987 | TV Asahi | 119 |