| Transformers: Cybertron | July 2, 2005 | Cartoon Network, TV Aichi | 52 |
| Transformers: Energon | January 31, 2004 | TV Tokyo | 52 |
| Transformers: Robots in Disguise | April 5, 2000 | TV Tokyo | 39 |
| Transformers: Super-God Masterforce | April 12, 1988 | Nippon Television | 42 |
| Transformers: The Headmasters | July 3, 1987 | — | 35 |
| Transformers: Victory | March 14, 1989 | Nippon Television | 32 |
| Trapp Family Story | January 13, 1991 | — | 40 |
| Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs | April 3, 2022 | — | 12 |
| Treasure Island | October 8, 1978 | Nippon Television Network System | 26 |
| Triage X | April 8, 2015 | — | 10 |
| Tribe Cool Crew | September 28, 2014 | — | 50 |
| Tribe Nine | January 10, 2022 | — | 12 |
| Trickster | October 4, 2016 | — | 24 |
| Trigun | April 1, 1998 | TV Tokyo | 26 |
| Trigun Stampede | January 7, 2023 | — | — |
| Trigun Stargaze | January 10, 2026 | — | 12 |
| Trillion Game | October 3, 2024 | — | — |
| Trinity Blood | April 28, 2005 | WOWOW | 24 |
| Trinity Seven | October 8, 2014 | — | 12 |
| Triton of the Sea | April 1, 1972 | TV Asahi | 27 |
| Tropical-Rouge! Pretty Cure | February 28, 2021 | TV Asahi | 46 |
| Trouble Chocolate | October 8, 1999 | — | 20 |
| True Tears | January 6, 2008 | — | 13 |
| Try Knights | July 30, 2019 | — | 12 |
| Tsubasa to Hotaru | March 6, 2015 | — | 7 |
| Tsubasa: Reservoir Chronicle | April 9, 2005 | NHK Educational TV | 52 |
| Tsugumi Project | — | — | — |
| Tsugumomo | April 3, 2017 | — | 12 |
| Tsuide ni Tonchinkan | October 10, 1987 | Fuji Television | 43 |
| Tsuihō Sareta Shōnin wa Kin no Chikara de Sekai o Sukū | — | — | — |
| Tsuki ga Kirei | April 6, 2017 | — | 12 |
| Tsuki wa Higashi ni Hi wa Nishi ni | June 30, 2004 | — | 13 |
| Tsukihime, Lunar Legend | October 10, 2003 | — | 12 |
| Tsukimichi: Moonlit Fantasy | July 7, 2021 | Tokyo MX | 37 |
| Tsukipro the Animation | October 4, 2017 | — | — |
| Tsukumogami Kashimasu | July 22, 2018 | NHK General TV | 12 |
| Tsukuyomi: Moon Phase | October 4, 2004 | TV Tokyo, TV Osaka | 25 |
| TsumaSho | October 6, 2024 | — | 12 |
| Tsuredure Children | July 4, 2017 | — | 12 |
| Tsuribaka Nisshi | November 2, 2002 | TV Asahi | 36 |
| Tsuritama | April 13, 2012 | Fuji Television | — |
| Tsurune | October 22, 2018 | — | 26 |
| Tsurupika Hagemaru-kun | March 3, 1988 | — | 59 |
| Tsuyokiss | July 1, 2006 | — | 12 |
| Tune In to the Midnight Heart | January 6, 2026 | Kansai Telecasting Corporation | 12 |
| Turkey! Time to Strike | July 9, 2025 | — | 12 |
| Turn A Gundam | April 9, 1999 | — | 50 |
| Tweeny Witches | April 9, 2004 | NHK Educational TV | 40 |
| Twilight Out of Focus | July 4, 2024 | — | 12 |
| Twin Angel Break | April 7, 2017 | — | 12 |
| Twin Angel: Twinkle Paradise | July 5, 2011 | — | 12 |
| Twin Princess of Wonder Planet | April 2, 2005 | TV Tokyo | 51 |
| Twin Spica | November 1, 2003 | NHK Satellite 2 Television | 20 |
| Twin Star Exorcists | April 6, 2016 | — | — |
| Two Car | October 7, 2017 | — | 12 |
| Tying the Knot with an Amagami Sister | October 2, 2024 | — | 24 |
| Tytania | October 9, 2008 | NHK Satellite 2 Television | 26 |
| Tōhai | October 5, 2024 | — | 25 |
| Tōshō Daimos | April 1, 1978 | TV Asahi | 44 |
| Uchi no Maid ga Uzasugiru! | October 5, 2018 | AT-X | 12 |