| Jokebook | April 23, 1982 | NBC | 7 |
| Joker Game | April 5, 2016 | — | — |
| Joker: Laugh Riot | — | — | — |
| Jokie | — | RTL Telekids | 52 |
| Jonny Quest | September 18, 1964 | American Broadcasting Company | 39 |
| Joobi the Fantastic Fox | — | SBS TV | 26 |
| Joodyssey | — | KBS 1TV | — |
| Joran: The Princess of Snow and Blood | April 7, 2021 | — | 12 |
| Josephina the Whale | April 9, 1979 | — | — |
| Joshi Kausei | April 6, 2019 | — | — |
| Joshiraku | July 5, 2012 | — | 13 |
| Josie and the Pussycats | September 12, 1970 | CBS | 16 |
| José Totoy | — | — | 50 |
| Journal with Witch | January 4, 2026 | — | 13 |
| Journey of Long | — | KBS 1TV | — |
| Jubei-chan 2: The Counterattack of Siberia Yagyu | January 7, 2004 | — | 13 |
| Jubei-chan: The Ninja Girl | April 5, 1999 | TV Tokyo | 13 |
| Juden Chan | June 25, 2009 | — | 12 |
| Judo Boy | April 2, 1969 | Fuji Television | 26 |
| Judo Sanka | April 1, 1974 | — | 27 |
| Jujutsu Kaisen | October 3, 2020 | TBS Television | 59 |
| Julius Jr. | September 29, 2013 | Disney Jr. | 52 |
| Jumanji | September 8, 1996 | UPN Kids, Bohbot Kids Network | 40 |
| Jungle Box | — | Tooniverse | — |
| Jungle Cubs | October 5, 1996 | American Broadcasting Company | 21 |
| Jungle de Ikou! | — | — | — |
| Jungle Junction | October 5, 2009 | Disney Jr. | 46 |
| Jungle King Tar-chan | October 14, 1993 | TV Tokyo | — |
| Jungle Kurobe | March 2, 1973 | TV Asahi | 31 |
| Jungledyret Hugo | October 4, 2003 | TV 2 Danmark | 13 |
| Junji Ito Collection | January 5, 2018 | — | 12 |
| Junji Ito Crimson | — | — | — |
| Junji Ito Maniac: Japanese Tales of the Macabre | January 19, 2023 | Netflix | 6 |
| Junjō Romantica | April 10, 2008 | — | 36 |
| Junket Bank | — | TV Tokyo | — |
| Jura Tripper | April 2, 1995 | TV Tokyo | 39 |
| Jurassic War | — | MBC TV | 26 |
| Jurassic World Camp Cretaceous | September 18, 2020 | — | 49 |
| Jurassic World: Chaos Theory | May 24, 2024 | — | 39 |
| Jushin Liger | March 11, 1989 | TV Asahi, Nagoya Broadcasting Network | 43 |
| Just Because! | October 5, 2017 | — | 12 |
| Justice League | November 17, 2001 | Cartoon Network | 52 |
| Justice League Action | December 16, 2016 | Cartoon Network | 52 |
| Justice League Action Shorts | June 29, 2017 | YouTube | 22 |
| Justice League Unlimited | July 31, 2004 | Cartoon Network, Toonami | 39 |
| Justin Time | September 22, 2011 | PBS, UniMás, NBC Kids, Qubo, Sprout | 26 |
| Juuni Senshi Bakuretsu Eto Ranger | April 7, 1995 | NHK Satellite 2 Television | 39 |
| Juuni Taisen | October 2, 2017 | — | — |
| Jyu-Oh-Sei | April 13, 2006 | — | 11 |
| Jája and Pája | — | — | 26 |
| Jómadarak | — | — | — |
| J⇔M | — | — | — |
| K | October 5, 2012 | — | 13 |
| K-On! | April 3, 2009 | TBS Television | — |
| K.O. Beast | — | — | 7 |
| Kabaneri of the Iron Fortress | April 8, 2016 | Fuji Television | — |
| KaBlam! | October 1, 1996 | Nickelodeon | 47 |
| Kabukibu! | April 6, 2017 | TBS Television | 12 |
| Kabuto Borg | December 5, 2006 | BS TV Tokyo | 52 |
| Kado: The Right Answer | April 7, 2017 | — | — |