| Gleipnir | April 5, 2020 | — | 13 |
| Gloomy the Naughty Grizzly | April 12, 2021 | — | 12 |
| Gnosia | October 12, 2025 | — | 21 |
| Go for It, Nakamura! | April 2, 2026 | — | 13 |
| Go with the Clouds, North-by-Northwest | 2027 | — | — |
| Go! Go! Loser Ranger! | April 7, 2024 | TBS Networks | 12 |
| Go! Princess Pretty Cure | February 1, 2015 | — | 50 |
| GO-GO Tamagotchi! | April 3, 2014 | — | 50 |
| Go-Q-Chōji Ikkiman | April 13, 1986 | Nippon Television | 32 |
| Goal FH | April 4, 1994 | NHK Satellite 2 Television | 39 |
| Goblin Slayer | October 7, 2018 | AT-X | 13 |
| God Eater | July 12, 2015 | — | 13 |
| God Mars | October 2, 1981 | — | 64 |
| God Mazinger | April 15, 1984 | — | — |
| Godannar | October 1, 2003 | — | 26 |
| Gods' Games We Play | April 1, 2024 | — | 13 |
| Godzilla Singular Point | April 1, 2021 | Tokyo MX | — |
| Godzilland | — | — | — |
| Gokiburi-chan | March 21, 2005 | TBS Channel | 20 |
| Gokigenyō, Ikkyoku Ikaga? | — | — | — |
| Gokudo the Adventurer | April 2, 1999 | TV Tokyo | 26 |
| Gokujyo | January 23, 2012 | — | 12 |
| Gokujō!! Mecha Mote Iinchō | April 4, 2009 | TV Tokyo | 102 |
| Gokusen | January 7, 2004 | Nippon Television | 13 |
| Gokū no Daibōken | January 7, 1967 | — | 39 |
| Golden Kamuy | April 9, 2018 | Tokyo MX | 24 |
| Golden Time | October 3, 2013 | — | 24 |
| Golden Warrior Gold Lightan | March 1, 1981 | TV Tokyo | 52 |
| Goldfish Warning! | January 12, 1991 | — | 54 |
| Gon | 2012 | — | — |
| Gonna be the Twin-Tail!! | October 9, 2014 | — | 12 |
| Good Luck Girl! | July 5, 2012 | — | 13 |
| Good Luck! Ninomiya-kun | October 4, 2007 | — | 12 |
| Goodbye, Dragon Life | October 11, 2024 | — | 12 |
| Goodbye, Lara | July 6, 2026 | — | 12 |
| Gordian Warrior | October 7, 1979 | TV Tokyo | 73 |
| GoShogun | July 3, 1981 | TV Tokyo | 26 |
| Gosick | January 7, 2011 | — | 24 |
| Gourmet Girl Graffiti | January 9, 2015 | — | 12 |
| Gowappa 5 Gōdam | April 4, 1976 | TV Asahi | 36 |
| GR: Giant Robo | January 19, 2007 | — | — |
| Granbelm | July 5, 2019 | — | 13 |
| Granblue Fantasy The Animation | January 21, 2017 | — | — |
| Grand Blue | July 14, 2018 | MBS | 36 |
| Grand Blues! | October 8, 2020 | — | 12 |
| Grander Musashi | April 2, 1997 | TV Tokyo | 64 |
| Grandpa and Grandma Turn Young Again | April 7, 2024 | — | 11 |
| Grandpa Danger | April 4, 2004 | TV Tokyo | 51 |
| Graveyard Kitaro | 2008 | — | — |
| Gravion | October 7, 2002 | — | 25 |
| Gravitation | October 4, 2000 | WOWOW | 13 |
| Great Dangaioh | April 5, 2001 | — | 13 |
| Great Mazinger | September 8, 1974 | Fuji Television | 56 |
| Great Pretender | June 2, 2020 | Netflix | 23 |
| Great Teacher Onizuka | June 30, 1999 | Fuji Television | 43 |
| Green Green | July 12, 2003 | — | 12 |
| Gregory Horror Show | October 1, 1999 | — | — |
| Grenadier: The Senshi of Smiles | October 15, 2004 | WOWOW | 12 |
| Grendizer | October 5, 1975 | Fuji Television | 74 |
| Grendizer U | July 5, 2024 | — | 13 |