| Blake and Mortimer | 1997 | Canal+ | 13 |
| Blame! | — | — | 6 |
| Blassreiter | April 5, 2008 | — | 24 |
| Blast of Tempest | October 5, 2012 | — | 24 |
| Blast-Off Buzzard | — | NBC | 13 |
| BlazBlue Alter Memory | October 8, 2013 | — | 12 |
| Blaze and the Monster Machines | October 13, 2014 | Nickelodeon | 151 |
| Blazing Dragons | September 9, 1996 | Canal+, Cartoon Network | 26 |
| Blazing Team: Masters of Yo Kwon Do | November 13, 2015 | — | — |
| 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 | — | — |
| Bless the Harts | September 29, 2019 | Fox Broadcasting Company | 34 |
| Blippi And Sesame Street Adventures | 2025 | — | — |
| Blippi Wonders | 2021 | — | 76 |
| Blippi's Job Show | 2025 | Netflix | 20 |
| Block! | April 22, 2006 | Televisión Nacional de Chile | — |
| Blocker Gundan 4 Machine Blaster | July 5, 1976 | Fuji Television | 38 |
| Blood Blockade Battlefront | April 5, 2015 | — | 26 |
| Blood Lad | 2013 | — | 10 |
| Blood of Zeus | October 27, 2020 | Netflix | 24 |
| Blood Royal | August 30, 2002 | — | 2 |
| 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 |
| Bludgeoning Angel Dokuro-Chan 2 | August 11, 2007 | — | 4 |
| 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 Comet SPT Layzner | August 21, 1986 | — | 3 |
| Blue Dragon | April 7, 2007 | Cartoon Network, Indosiar | 51 |
| Blue Drop | October 2, 2007 | — | 13 |
| Blue Exorcist | April 17, 2011 | — | 37 |
| Blue Eye Samurai | November 3, 2023 | — | 8 |
| 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 |
| Blue Seed 2 | July 24, 1996 | — | 3 |
| Blue Sonnet | July 16, 1989 | — | 5 |
| Bluey | October 1, 2018 | ABC Kids | 154 |
| BNA: Brand New Animal | April 8, 2020 | — | 12 |
| Bo on the Go! | September 3, 2007 | CBC Television | 50 |
| BO shop | June 22, 2003 | — | 26 |
| Boarding School Juliet | October 6, 2018 | — | 12 |
| Bob and Bobby - Top Hat Rabbits | 1979 | — | 91 |
| Bob and Margaret | June 22, 1998 | Comedy Central, Channel 4, Global Television Network | 52 |
| Bob the Builder | May 15, 1997 | British Broadcasting Corporation, BBC One, BBC Two, CBeebies | 298 |
| Bob's Burgers | January 9, 2011 | Fox Broadcasting Company | 313 |
| Bobby's Body | November 8, 2000 | VPRO | 14 |
| Bobby's World | September 8, 1990 | Fox Broadcasting Company, Fox Kids | 81 |
| Boblins | September 2006 | — | 78 |
| Bobo Siebenschläfer | 2014 | KiKA | 52 |
| Bobobo-bo Bo-bobo | November 8, 2003 | — | 76 |