| Kaeloo | June 6, 2010 | — | 202 |
| Kagaku Bōkentai Tansar 5 | July 27, 1979 | — | 34 |
| Kagaku Manga Survival | October 6, 2024 | NHK Educational TV | — |
| Kage Kara Mamoru! | January 7, 2006 | — | 12 |
| Kageki Shojo!! | July 4, 2021 | — | 13 |
| Kagewani | October 2, 2015 | — | 13 |
| Kagihime Monogatari Eikyū Alice Rondo | January 3, 2006 | — | 13 |
| Kaginado | October 12, 2021 | Tokyo MX | 24 |
| Kagurabachi | April 2027 | — | — |
| Kaguya-sama: Love is War | January 12, 2019 | — | 37 |
| Kaiba | April 11, 2008 | WOWOW | 12 |
| Kaibutsu-kun | April 21, 1968 | TBS Television | 49 |
| Kaidan Restaurant | — | — | — |
| Kaiji | October 3, 2007 | — | 51 |
| Kaiju Girl Caramelise | July 3, 2026 | — | 12 |
| Kaiju Girls | — | — | — |
| Kaiju No. 8 | April 13, 2024 | — | — |
| Kaijudo | June 2, 2012 | — | 52 |
| Kaiketsu Zorori | February 1, 2004 | — | 52 |
| Kaina of the Great Snow Sea | January 12, 2023 | Fuji Television | 11 |
| Kaitō Tenshi Twin Angel | September 18, 2008 | — | 2 |
| Kakegurui | July 1, 2017 | — | 24 |
| Kakegurui Twin | August 4, 2022 | Netflix | 6 |
| Kakuriyo: Bed & Breakfast for Spirits | April 2, 2018 | — | 26 |
| Kakushigoto | April 2, 2020 | — | 12 |
| Kakyuusei 2 | — | — | — |
| Kakyūsei | July 2, 1999 | — | 13 |
| Kakyūsei 2 | October 2, 2004 | — | 13 |
| Kaleido Star | April 4, 2003 | TV Tokyo | 51 |
| Kalles klätterträd | December 25, 1975 | SVT2 | — |
| Kambu | — | — | 52 |
| Kamen no Maid Guy | April 5, 2008 | — | 12 |
| Kamen no Ninja Akakage | October 13, 1987 | Nippon Television | 23 |
| Kamichama Karin | April 6, 2007 | TV Tokyo | 26 |
| Kamichu! | June 29, 2005 | TV Asahi | — |
| KamiErabi GOD.app | October 5, 2023 | — | — |
| Kamigami no Asobi | April 5, 2014 | — | 12 |
| KamiKatsu | April 6, 2023 | — | 12 |
| Kamisama Dolls | July 6, 2011 | — | 13 |
| Kamisama Kazoku | May 18, 2006 | — | 13 |
| Kamisama Kiss | October 1, 2012 | — | 25 |
| Kamisama Minarai: Himitsu no Cocotama | October 1, 2015 | — | — |
| Kamitsubaki City Under Construction | July 3, 2025 | — | 13 |
| Kamp Koral: SpongeBob's Under Years | March 4, 2021 | Nickelodeon | 26 |
| Kamui the Ninja | April 6, 1969 | Fuji Television | 26 |
| Kamui: He's Behind You | July 4, 2026 | — | 12 |
| Kanamemo | June 5, 2009 | TV Tokyo | 13 |
| Kandagawa Jet Girls | October 8, 2019 | AT-X | 12 |
| Kangaroo Creek Gang | April 1, 2002 | Nine Network | 26 |
| Kangetsu Ittō: Akuryō-Giri | October 5, 1989 | — | 2 |
| Kangoo | 1996 | TF1 | 65 |
| Kangoo Juniors | — | TF1 | 104 |
| Kannagi: Crazy Shrine Maidens | October 4, 2008 | — | 13 |
| Kannazuki no Miko | October 1, 2004 | — | 12 |
| Kanojo no Tomodachi | October 5, 2026 | — | — |
| Kanokon | April 5, 2008 | AT-X | 12 |
| Kanokon: Manatsu no Daishanikusai | October 4, 2009 | — | 2 |
| Kanon | 2002 | Fuji Television | 13 |
| Kanon | October 5, 2006 | TBS Television | 24 |
| Kantai Collection | January 8, 2015 | Tokyo MX, Kyoto Broadcasting System | 20 |