| Monster Eater | April 3, 2026 | — | 12 |
| Monster Farm | 1998 | — | — |
| Monster Girl Doctor | July 12, 2020 | — | 12 |
| Monster Girl Quest | — | — | — |
| Monster High | May 5, 2010 | YouTube | 182 |
| Monster High | October 6, 2022 | Nickelodeon | 33 |
| Monster Hunter Stories: Ride On | October 2, 2016 | Fuji Television | 75 |
| Monster List | — | Bilibili, IQIYI, Tencent Video | — |
| Monster Mania | September 11, 1995 | Broadcast syndication, CITV | 26 |
| Monster Math Squad | May 7, 2012 | CBC Kids | 50 |
| Monster Musume | July 7, 2015 | — | 12 |
| Monster Rancher | April 17, 1999 | — | 73 |
| Monster Shaker | July 8, 2024 | Gulli, Clan | 51 |
| Monster Strike | — | — | — |
| Monster Strike: Deadverse Reloaded | October 21, 2025 | — | 10 |
| Monster Top | — | KBS 2TV | — |
| Monsters & Pirates | 2009 | — | — |
| Monsters at Work | 2021 | Disney+ | 20 |
| Monsters vs. Aliens | March 23, 2013 | Nickelodeon | 26 |
| Monsuno | February 23, 2012 | Nicktoons | 65 |
| Montana Jones | April 2, 1994 | NHK General TV | 52 |
| Monthly Girls' Nozaki-kun | July 7, 2014 | TV Tokyo | 12 |
| MooBoo Cops | — | Kaku Children's Television | — |
| Moomin | October 5, 1969 | — | 65 |
| Moomin | April 12, 1990 | TV Tokyo | 104 |
| Moominvalley | 2019 | Yle | 26 |
| Moon Girl and Devil Dinosaur | February 10, 2023 | Disney Channel | 30 |
| Moonbeam City | September 16, 2015 | Comedy Central | 10 |
| Moonlight Mile | February 4, 2007 | WOWOW | 26 |
| Moonrise | — | Netflix | 18 |
| Moonzy | September 1, 2006 | Russia-1, Russia-K, Carousel, Mult | 572 |
| Moral Orel | December 13, 2005 | Adult Swim | 43 |
| More Than a Married Couple, But Not Lovers | October 9, 2022 | — | 12 |
| Moriarty the Patriot | October 11, 2020 | — | 24 |
| Moribito: Guardian of the Spirit | April 7, 2007 | NHK Satellite 2 Television | 26 |
| Moriki-Doriki | 2018 | — | 26 |
| Morita-san wa Mukuchi | July 6, 2011 | — | 26 |
| Morizo to Kikkoro | — | NHK Educational TV | — |
| Mork & Mindy/Laverne & Shirley/Fonz Hour | September 25, 1982 | American Broadcasting Company | 27 |
| Mort and Phil | January 14, 1995 | Antena 3 | 26 |
| Mortal Kombat: Defenders of the Realm | September 21, 1996 | USA Network | 13 |
| Moshidora | April 25, 2011 | NHK General TV | 10 |
| Mot | May 30, 1995 | Canal+, France 3 | 26 |
| Motel Transylvania | 2025 | Netflix | — |
| Mother Goose and Grimm | September 14, 1991 | CBS | 10 |
| Mother of the Goddess' Dormitory | July 14, 2021 | — | 10 |
| Motorcity | April 30, 2012 | Disney XD | 20 |
| Motown Magic | November 20, 2018 | Netflix | 25 |
| Motto! Majime ni Fumajime Kaiketsu Zorori | April 5, 2020 | NHK Educational TV | — |
| Motu Patlu | October 16, 2012 | Nickelodeon India | 1,296 |
| Mouk | September 19, 2011 | France 5 | 104 |
| Mountain of Gems | 2005 | — | 71 |
| Mouse | January 6, 2003 | Chiba Television Broadcasting | 12 |
| Mouseterpiece Theater | April 18, 1983 | Disney Channel | 60 |
| Mouss & Boubidi | June 29, 2009 | ICI Radio-Canada Télé, France 3, France Ô | 52 |
| Moville Mysteries | September 7, 2002 | Nickelodeon | 26 |
| Moyasimon: Tales of Agriculture | October 12, 2007 | Fuji Television | 22 |
| Mr Benn | January 7, 1971 | — | 14 |
| Mr Love: Queen's Choice | July 16, 2020 | Tokyo MX | 12 |
| Mr. Baby | May 3, 2009 | France 3 | 48 |