| With a Dog AND a Cat, Every Day is Fun | October 2, 2020 | MBS | 24 |
| With Vengeance, Sincerely, Your Broken Saintess | July 10, 2025 | — | 12 |
| With You and the Rain | July 6, 2025 | — | 12 |
| With You, Our Love Will Make It Through | October 14, 2025 | — | 12 |
| WIXOSS Diva(A)Live | January 9, 2021 | — | — |
| Wizard Barristers | January 12, 2014 | — | 12 |
| Wizards: Tales of Arcadia | August 7, 2020 | Netflix | 10 |
| Wobbly Land | — | — | — |
| Wolf Boy Ken | November 25, 1963 | — | 86 |
| Wolf Girl and Black Prince | October 5, 2014 | — | 12 |
| Wolf's Rain | January 6, 2003 | Fuji Television | 30 |
| Wolfboy and the Everything Factory | September 24, 2021 | Apple TV | — |
| Wolverine | January 7, 2011 | — | 12 |
| Wolverine and the X-Men | January 23, 2009 | Nicktoons | 26 |
| Women at Work | — | — | — |
| Women Wearing Shoulder Pads | August 17, 2025 | — | — |
| Wonder Beat Scramble | January 2, 1986 | — | — |
| Wonder Egg Priority | January 13, 2021 | Nippon Television | 12 |
| Wonder Pets! | March 3, 2006 | Nickelodeon | 62 |
| Wonder Showzen | March 11, 2005 | MTV2, MTV2 | 16 |
| Wonderful Pretty Cure! | February 4, 2024 | All-Nippon News Network, TV Asahi | 50 |
| WondLa | — | — | 14 |
| Wondrous Myths and Legends | 1999 | — | 13 |
| Woodpecker Detective's Office | April 13, 2020 | — | 12 |
| Woody Woodpecker | December 3, 2018 | Facebook, YouTube | 30 |
| Woofy | November 13, 2004 | ICI Radio-Canada Télé, France 5 | 65 |
| Wooser's Hand-to-Mouth Life | October 3, 2012 | — | 37 |
| WordGirl | September 3, 2007 | PBS Kids, PBS Kids Go! | 130 |
| WordWorld | September 3, 2007 | PBS | 45 |
| Work It Out Wombats! | February 6, 2023 | PBS Kids | — |
| Working!! | April 4, 2010 | — | 40 |
| World Break: Aria of Curse for a Holy Swordsman | January 11, 2015 | — | 12 |
| World Conquest Zvezda Plot | January 11, 2014 | — | 12 |
| World Dai Star | April 9, 2023 | — | 12 |
| World Destruction | July 7, 2008 | TV Tokyo | 13 |
| World Fairy Tale Series | October 4, 1995 | — | — |
| World of Quest | March 15, 2008 | The CW, Kids' WB | 26 |
| World of Winx | November 4, 2016 | Netflix, Rai Gulp | 26 |
| World Trigger | October 5, 2014 | — | — |
| World War Blue | October 20, 2012 | — | 3 |
| World Witches Take Off! | January 13, 2021 | — | 12 |
| World's End Harem | October 8, 2021 | — | 11 |
| WorldEnd | April 11, 2017 | — | 12 |
| Wotakoi: Love is Hard for Otaku | April 13, 2018 | Fuji Television | 11 |
| Wound & Bandage | January 10, 2027 | — | — |
| Wow! Wow! Wubbzy! | August 28, 2006 | Nickelodeon, Nick Jr. Channel, Starz | 52 |
| Wowser | April 5, 1988 | TV Tokyo | 104 |
| Wu Geng Ji | — | Tencent Video | — |
| Wunschpunsch | October 14, 2000 | Jetix, TF1, Fox Kids, Cartoon Network | 52 |
| Wylde Pak | June 6, 2025 | Nickelodeon | 13 |
| Wyprawa Profesora Gąbki | 1979 | Telewizja Polska | 13 |
| Włatcy móch | November 14, 2006 | TV4 | 39 |
| X | October 3, 2001 | WOWOW | 24 |
| X&Y | — | Bilibili | — |
| X-DuckX | August 26, 2001 | France 3 | 78 |
| X-Men | October 31, 1992 | Fox Broadcasting Company, Fox Kids | 76 |
| X-Men | April 1, 2011 | — | — |
| X-Men '97 | March 20, 2024 | Disney+ | 19 |
| X-Men: Evolution | November 4, 2000 | The WB | 52 |
| Xam'd: Lost Memories | July 15, 2008 | — | 26 |