| Gigantor | October 20, 1963 | Fuji Television | 97 |
| Gilgamesh | October 2, 2003 | — | 26 |
| Gin'iro no Olynssis | October 6, 2006 | — | — |
| Ginban Kaleidoscope | October 8, 2005 | TV Tokyo | 12 |
| Ginga Hyōryū Vifam | October 21, 1983 | MBS | 46 |
| Ginga Sengoku Gun'yūden Rai | April 8, 1994 | TV Tokyo | 52 |
| Gingitsune | October 7, 2013 | — | 12 |
| Gintama | April 4, 2006 | TV Tokyo | 353 |
| Gintama: Mr. Ginpachi's Zany Class | October 7, 2025 | — | — |
| Girl Crush | — | — | — |
| Girl Friend Beta | October 13, 2014 | — | 12 |
| Girlfriend, Girlfriend | July 3, 2021 | — | 24 |
| Girlish Number | October 7, 2016 | — | 12 |
| Girls Band Cry | April 6, 2024 | — | 13 |
| Girls Beyond the Wasteland | January 7, 2016 | — | 12 |
| Girls Bravo | July 6, 2004 | — | 24 |
| Girls und Panzer | October 8, 2012 | — | 12 |
| Girls und Panzer das Finale | — | — | — |
| Girls und Panzer: Motto Love Love Sakusen Desu! | — | — | — |
| Girls' Frontline | January 8, 2022 | — | — |
| Girls' Last Tour | October 6, 2017 | — | 12 |
| Girly Air Force | January 10, 2019 | AT-X | 12 |
| Given | July 11, 2019 | — | 11 |
| GJ Club | January 10, 2013 | Nippon Television | 12 |
| Glamorous Heroes | October 7, 2017 | — | — |
| Glass Fleet | April 4, 2006 | — | 26 |
| Glass Maiden | April 8, 2008 | — | — |
| Glass Mask | April 9, 1984 | Nippon Television | 22 |
| Glass Mask | April 6, 2005 | TV Tokyo | 51 |
| Glass no Kamen desu ga | April 7, 2013 | — | 3 |
| Glass no Kamen desu ga Z | April 28, 2013 | — | 14 |
| Glasses with a Chance of Delinquent | 2027 | — | — |
| Glasslip | July 3, 2014 | Tokyo MX | 13 |
| Gleipnir | April 5, 2020 | — | 13 |
| Gloomy the Naughty Grizzly | April 12, 2021 | — | 12 |
| Gnosia | October 12, 2025 | — | 21 |
| Go Astro Boy Go! | 2019 | — | 52 |
| 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 | September 9, 1978 | NBC, TV Tokyo | 26 |
| Godzilla Singular Point | April 1, 2021 | Tokyo MX | — |
| Godzilla: The Series | September 12, 1998 | Fox Broadcasting Company, Fox Kids | 40 |
| 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 |