| Big Windup! | April 12, 2007 | TBS Television | — |
| Big X | August 3, 1964 | — | 59 |
| Bikkuriman | May 17, 1992 | — | — |
| Bikkuriman 2000 | November 1, 1999 | TV Tokyo | 68 |
| Binan Kōkō Chikyū Bōei-bu Haikara! | July 7, 2025 | — | — |
| Binbō Shimai Monogatari | June 29, 2006 | — | 10 |
| Birdie Wing: Golf Girls' Story | April 6, 2022 | — | — |
| Birdy the Mighty: Decode | July 5, 2008 | — | 25 |
| Bismark | October 7, 1984 | — | 51 |
| Black Blood Brothers | September 8, 2006 | — | 12 |
| Black Bullet | April 8, 2014 | — | 13 |
| Black Butler | October 3, 2008 | MBS | 70 |
| Black Cat | October 6, 2005 | — | 23 |
| Black Channel | — | — | — |
| Black Clover | October 3, 2017 | Cartoon Network, TX Network | 170 |
| Black Heaven | July 8, 1999 | WOWOW | 13 |
| Black Jack | October 11, 2004 | — | 61 |
| Black Jack 21 | April 10, 2006 | — | 17 |
| Black Lagoon | April 8, 2006 | — | 29 |
| Black Rock Shooter | February 2, 2012 | — | 8 |
| Black Rock Shooter: Dawn Fall | April 3, 2022 | — | 9 |
| Black Summoner | July 9, 2022 | — | 12 |
| Black Torch | July 4, 2026 | — | 12 |
| Blade | July 1, 2011 | Animax | 12 |
| Blade & Soul | April 3, 2014 | — | 13 |
| Blade of the Immortal | July 14, 2008 | AT-X | 13 |
| Bladedance of Elementalers | July 14, 2014 | — | 12 |
| Blassreiter | April 5, 2008 | — | 24 |
| Blast of Tempest | October 5, 2012 | — | 24 |
| BlazBlue Alter Memory | October 8, 2013 | — | 12 |
| Bleach | October 5, 2004 | TV Tokyo | 406 |
| Bleach: Thousand-Year Blood War | October 11, 2022 | TV Tokyo | 13 |
| Blend S | October 8, 2017 | Tokyo MX, AT-X, Nippon BS Broadcasting, Kansai Telecasting Corporation, TV Aichi | 12 |
| Bless | January 2027 | — | — |
| Blocker Gundan 4 Machine Blaster | July 5, 1976 | Fuji Television | 38 |
| Blood Blockade Battlefront | April 5, 2015 | — | 26 |
| Blood Lad | 2013 | — | 10 |
| Blood+ | October 8, 2005 | — | 50 |
| Blood-C | July 1, 2011 | — | 12 |
| Bloom Into You | October 5, 2018 | AT-X | 13 |
| Bludgeoning Angel Dokuro-Chan | March 13, 2005 | — | 12 |
| Blue Archive the Animation | April 7, 2024 | — | — |
| Blue Blink | April 7, 1989 | NHK General TV | 39 |
| Blue Box | October 3, 2024 | — | 25 |
| Blue Comet SPT Layzner | October 3, 1985 | — | 38 |
| Blue Dragon | April 7, 2007 | Cartoon Network, Indosiar | 51 |
| Blue Drop | October 2, 2007 | — | 13 |
| Blue Exorcist | April 17, 2011 | — | 37 |
| Blue Gender | October 10, 1999 | TBS Television | 26 |
| Blue Lock | October 9, 2022 | — | 38 |
| Blue Miburo | October 12, 2024 | — | — |
| Blue Orchestra | April 9, 2023 | NHK Educational TV | 24 |
| Blue Period | October 2, 2021 | — | 12 |
| Blue Reflection Ray | April 10, 2021 | — | 24 |
| Blue Seed | October 5, 1994 | TV Tokyo | 26 |
| BNA: Brand New Animal | April 8, 2020 | — | 12 |
| Boarding School Juliet | October 6, 2018 | — | 12 |
| Bobobo-bo Bo-bobo | November 8, 2003 | — | 76 |
| Bocchi the Rock! | October 9, 2022 | — | 12 |
| Bodacious Space Pirates | January 8, 2012 | — | 26 |