| Jewelpet | April 5, 2009 | TV Tokyo | 52 |
| Jing: King of Bandits | May 15, 2002 | NHK Satellite 2 Television | 16 |
| Jinsei | July 6, 2014 | — | 13 |
| Joshiraku | July 5, 2012 | — | 13 |
| Jubei-chan: The Ninja Girl | April 5, 1999 | TV Tokyo | 13 |
| Juden Chan | June 25, 2009 | — | 12 |
| Jungle de Ikou! | — | — | — |
| Juuni Senshi Bakuretsu Eto Ranger | April 7, 1995 | NHK Satellite 2 Television | 39 |
| K-On! | April 3, 2009 | TBS Television | — |
| K.O. Beast | — | — | 7 |
| Kage Kara Mamoru! | January 7, 2006 | — | 12 |
| Kakushigoto | April 2, 2020 | — | 12 |
| Kamen no Maid Guy | April 5, 2008 | — | 12 |
| Kamisama Kazoku | May 18, 2006 | — | 13 |
| Kamisama Kiss | October 1, 2012 | — | 25 |
| Kamui: He's Behind You | July 4, 2026 | — | 12 |
| Kanamemo | June 5, 2009 | TV Tokyo | 13 |
| Kappa no Kaikata | October 4, 2004 | — | 26 |
| Kappamaki | March 31, 2003 | — | 130 |
| Karneval | April 3, 2013 | — | 13 |
| Katanagatari | January 26, 2010 | — | 12 |
| Kekkaishi | October 16, 2006 | Cartoon Network, Nippon Television | 52 |
| Kemono Michi: Rise Up | October 2, 2019 | — | 12 |
| Kenichi: The Mightiest Disciple | October 8, 2006 | TV Tokyo | 50 |
| Kenichi: The Mightiest Disciple – The Attack of Darkness | March 14, 2012 | — | 11 |
| Kenyū Densetsu Yaiba | April 9, 1993 | TV Tokyo | 52 |
| Kiko-chan's Smile | October 5, 1996 | TBS Television | 51 |
| Kill Blue | April 11, 2026 | — | 12 |
| Kill la Kill | October 4, 2013 | — | 24 |
| Kill Me Baby | January 5, 2012 | TBS Television | 13 |
| Kimi to Boku | October 4, 2011 | TV Tokyo | 26 |
| Kin-iro Mosaic | July 6, 2013 | — | 24 |
| Kirby: Right Back at Ya! | October 6, 2001 | CBC Television Co. | 100 |
| Kobo, the Li'l Rascal | October 19, 1992 | Nippon Television | 63 |
| Kocchi Muite! Miiko | February 14, 1998 | TV Asahi | 42 |
| Koihime Musō | July 9, 2008 | — | — |
| Koisuru One Piece | — | — | — |
| KonoSuba | January 13, 2016 | Tokyo MX | 31 |
| KonoSuba: An Explosion on This Wonderful World! | April 6, 2023 | — | 12 |
| Kotaro Lives Alone | March 10, 2022 | Netflix | 10 |
| Kuma Miko: Girl Meets Bear | April 3, 2016 | — | 12 |
| Kuromajo-san ga Toru!! | April 4, 2012 | NHK Educational TV | 60 |
| Kyō no Go no Ni | March 24, 2006 | — | 4 |
| Kyō no Go no Ni | October 5, 2008 | TV Tokyo | 13 |
| Kyōfu! Zombie Neko | October 2, 2015 | — | 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 |
| Level 1 Demon Lord and One Room Hero | July 3, 2023 | — | 12 |
| Li'l Miss Vampire Can't Suck Right | October 12, 2025 | — | 12 |
| Life Lessons with Uramichi Oniisan | July 6, 2021 | — | 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 Pollon | May 8, 1982 | Fuji Television | 46 |
| Little Wansa | April 2, 1973 | — | 26 |
| Locodol | July 4, 2014 | TBS Television | 12 |
| Lost Universe | April 3, 1998 | TV Tokyo | 26 |
| Love Live! School Idol Project | 2013 | Tokyo MX | 26 |
| Lucifer and the Biscuit Hammer | July 9, 2022 | — | 24 |
| Lunatic Night | September 21, 1996 | — | 3 |