| Momentary Lily | January 2, 2025 | — | 13 |
| Momo Kyun Sword | July 9, 2014 | — | 12 |
| Momoiro Sisters | August 26, 1998 | TBS Television | 23 |
| Momokuri | December 24, 2015 | — | 26 |
| Mon Chéri CoCo | August 27, 1972 | TBS Television | — |
| Mon Colle Knights | January 10, 2000 | TV Tokyo | 51 |
| Monarch: The Big Bear of Tallac | June 7, 1977 | TV Asahi, Asahi Broadcasting Group Holdings | 26 |
| Monchhichi | September 10, 1983 | — | — |
| Monkey Magic | — | — | 13 |
| Monkey Punch: Manga Katsudou Daishashin | July 31, 2004 | — | — |
| Monkey Turn | January 10, 2004 | — | 50 |
| Monkey Typhoon | October 1, 2002 | TV Tokyo | 52 |
| Mono | April 13, 2025 | — | 12 |
| Monochrome Factor | April 7, 2008 | — | 24 |
| Monogatari | July 3, 2009 | — | 100 |
| Mononoke | July 12, 2007 | Fuji Television | 12 |
| Monster | April 6, 2004 | Nippon Television | 74 |
| Monster Eater | April 3, 2026 | — | 12 |
| Monster Girl Doctor | July 12, 2020 | — | 12 |
| Monster Girl Quest | — | — | — |
| Monster Hunter Stories: Ride On | October 2, 2016 | Fuji Television | 75 |
| Monster Musume | July 7, 2015 | — | 12 |
| Monster Rancher | April 17, 1999 | — | 73 |
| Monster Strike: Deadverse Reloaded | October 21, 2025 | — | 10 |
| 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 |
| Moomin | October 5, 1969 | — | 65 |
| Moomin | April 12, 1990 | TV Tokyo | 104 |
| Moonlight Mile | February 4, 2007 | WOWOW | 26 |
| Moonrise | — | Netflix | 18 |
| 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 |
| Morita-san wa Mukuchi | July 6, 2011 | — | 26 |
| Morizo to Kikkoro | — | NHK Educational TV | — |
| Moshidora | April 25, 2011 | NHK General TV | 10 |
| Mother of the Goddess' Dormitory | July 14, 2021 | — | 10 |
| Motto! Majime ni Fumajime Kaiketsu Zorori | April 5, 2020 | NHK Educational TV | — |
| Mouse | January 6, 2003 | Chiba Television Broadcasting | 12 |
| Moyasimon: Tales of Agriculture | October 12, 2007 | Fuji Television | 22 |
| Mr Love: Queen's Choice | July 16, 2020 | Tokyo MX | 12 |
| Mr. Osomatsu | October 5, 2015 | — | 25 |
| Mr. Stain on Junk Alley | January 6, 2003 | — | 14 |
| Mr. Tonegawa: Middle Management Blues | July 4, 2018 | Nippon Television | 24 |
| Mr. Villain's Day Off | January 8, 2024 | — | 12 |
| Mrs. Pepper Pot | April 4, 1983 | NHK General TV | 130 |
| Ms. Isshiki Wants to Know About Love | January 2027 | — | — |
| Ms. Koizumi Loves Ramen Noodles | January 4, 2018 | AT-X | 12 |
| Ms. Vampire Who Lives in My Neighborhood | October 5, 2018 | AT-X | 12 |
| Muka Muka Paradise | September 4, 1993 | — | — |
| Multi-Mind Mayhem | January 2027 | — | — |
| Murai in Love | October 6, 2024 | — | 12 |
| Murciélago | January 2027 | — | — |
| Murder Mystery of the Dead | November 13, 2024 | Tokyo MX | 6 |
| Muromi-san | April 7, 2013 | — | 13 |
| Musashi Gundoh | 2006 | — | 26 |
| Musashi no Ken | April 18, 1985 | TV Tokyo | 72 |
| Musashi, the Samurai Lord | October 3, 1990 | Nippon Television | — |
| Musasino! | July 2, 2022 | — | — |