| Welcome to Demon School! Iruma-kun | October 5, 2019 | NHK Educational TV | 65 |
| Welcome to Demon School! Iruma-kun: IruMafia Edition | January 4, 2027 | NHK General TV | — |
| Welcome to Japan, Ms. Elf! | January 10, 2025 | AT-X | 12 |
| Welcome to Japari Park | — | — | 36 |
| Welcome to Pia Carrot | October 24, 1997 | — | 3 |
| Welcome to Pia Carrot 2 | October 23, 1998 | — | 3 |
| Welcome to the Ballroom | July 8, 2017 | — | 24 |
| Welcome to the N.H.K. | July 9, 2006 | — | 24 |
| Welcome to the Outcast's Restaurant! | July 3, 2025 | — | 12 |
| What's Michael? | April 15, 1988 | TV Tokyo | 45 |
| When Supernatural Battles Became Commonplace | October 6, 2014 | — | 12 |
| When Will Ayumu Make His Move? | July 8, 2022 | — | 12 |
| Whisper Me a Love Song | April 14, 2024 | — | 12 |
| Whispered Words | October 7, 2009 | TV Tokyo | 13 |
| Whistle! | May 5, 2002 | — | — |
| White Album | January 4, 2009 | — | — |
| White Album 2 | October 6, 2013 | Tokyo MX, Nippon BS Broadcasting, TV Aichi, MBS | 13 |
| Why Does Nobody Remember Me in This World? | July 13, 2024 | — | 12 |
| Why Raeliana Ended Up at the Duke's Mansion | April 10, 2023 | — | — |
| Why The Hell Are You Here, Teacher!? | April 8, 2019 | — | 12 |
| Wild 7 Another | April 27, 2002 | — | 13 |
| Wild Adapter | — | — | — |
| Wild Arms: Twilight Venom | October 18, 1999 | WOWOW | 22 |
| Wild Knights Gulkeeva | April 4, 1995 | — | 26 |
| Wind Breaker | April 5, 2024 | — | 13 |
| Wind: A Breath of Heart | June 25, 2004 | — | 3 |
| Wind: A Breath of Heart | June 30, 2004 | AT-X | 13 |
| Windy Tales | September 11, 2004 | — | 13 |
| Winter Cicada | February 23, 2007 | — | 3 |
| Winter Garden | December 23, 2006 | — | — |
| Wise Man's Grandchild | April 10, 2019 | — | 12 |
| Wish Upon the Pleiades | April 9, 2015 | — | 12 |
| Wistoria: Wand and Sword | July 7, 2024 | — | 24 |
| Witch and Hound | — | — | — |
| Witch and Mercenary | 2027 | — | — |
| Witch Hat Atelier | April 6, 2026 | — | 13 |
| Witch Hunter Robin | July 2, 2002 | Animax, TV Tokyo | 26 |
| Witch Watch | April 6, 2025 | — | — |
| Witchblade | April 16, 2006 | — | 24 |
| Witchcraft Works | January 5, 2014 | — | 12 |
| Witchy Pretty Cure! | February 7, 2016 | — | 50 |
| Witchy Pretty Cure!! Mirai Days | January 11, 2025 | TV Asahi | 12 |
| 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 |
| 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 |
| Wolverine | January 7, 2011 | — | 12 |
| Women at Work | — | — | — |
| Wonder Beat Scramble | January 2, 1986 | — | — |
| Wonder Egg Priority | January 13, 2021 | Nippon Television | 12 |
| Wonderful Pretty Cure! | February 4, 2024 | All-Nippon News Network, TV Asahi | 50 |
| Woodpecker Detective's Office | April 13, 2020 | — | 12 |
| Wooser's Hand-to-Mouth Life | October 3, 2012 | — | 37 |
| Working!! | April 4, 2010 | — | 40 |
| World Break: Aria of Curse for a Holy Swordsman | January 11, 2015 | — | 12 |