| Genius? Dr. Hamax | October 6, 2007 | Family Gekijo | 12 |
| Genji Monogatari Sennenki | January 15, 2009 | Fuji Television | 11 |
| Genji Tsūshin Agedama | October 3, 1991 | — | — |
| Genki Bakuhatsu Ganbaruger | April 1, 1992 | TV Tokyo | 47 |
| Genshi Shōnen Ryū | October 30, 1971 | — | 22 |
| Genshiken | October 11, 2004 | — | 24 |
| Genshiken: Second Generation | July 7, 2013 | Tokyo MX | — |
| GetBackers | October 5, 2002 | — | 49 |
| Getsumento Heiki Mina | January 13, 2007 | — | 11 |
| Getter Robo | April 4, 1974 | — | 51 |
| Getter Robo G | May 15, 1975 | — | 39 |
| Getter Robo Go | February 11, 1991 | — | 50 |
| Ghost Concert: Missing Songs | April 6, 2026 | — | 12 |
| Ghost Hound | October 18, 2007 | WOWOW | 22 |
| Ghost Hunt | October 3, 2006 | — | 25 |
| Ghost in the Shell: Arise - Alternative Architecture | April 5, 2015 | Tokyo MX | 10 |
| Ghost in the Shell: SAC_2045 | April 23, 2020 | Netflix | 24 |
| Ghost in the Shell: Stand Alone Complex | October 1, 2002 | SkyChannel | 52 |
| Ghost Slayers Ayashi | October 7, 2006 | — | 25 |
| Ghost Stories | October 22, 2000 | Fuji Television | 20 |
| Ghost Sweeper Mikami | April 11, 1993 | — | 45 |
| Giant Beasts of Ars | January 7, 2023 | — | 12 |
| Giant Gorg | April 5, 1984 | TV Tokyo | 26 |
| Giant Killing | April 4, 2010 | NHK Satellite 2 Television, NHK Digital Satellite HD | — |
| Giant Ojō-sama | January 2027 | — | — |
| Gibiate | July 15, 2020 | — | 12 |
| Gifted | 2027 | — | — |
| Gifū Dōdō!! Kanetsugu to Keiji | July 3, 2013 | — | 25 |
| Gigant Big-Shot Tsukasa | April 1, 2014 | — | — |
| 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' 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 |