| I Have a Crush at Work | January 6, 2025 | — | 12 |
| I Left My A-Rank Party to Help My Former Students Reach the Dungeon Depths! | January 12, 2025 | — | 24 |
| I Lost My Adventurer's License, but It's Fine Because I Have an Adorable Daughter Now | January 2027 | — | — |
| I Made Friends with the Second Prettiest Girl in My Class | April 7, 2026 | — | 12 |
| I May Be a Guild Receptionist, But I'll Solo Any Boss to Clock Out on Time | January 11, 2025 | — | 12 |
| I My Me! Strawberry Eggs | July 4, 2001 | — | 13 |
| I Parry Everything | July 5, 2024 | — | 12 |
| I Saved Myself with a Potion! | October 3, 2025 | — | 12 |
| I Shall Survive Using Potions! | October 8, 2023 | — | 12 |
| I Summoned a Succubus and My Stepmom Appeared!? | November 3, 2022 | — | 2 |
| I Think I Turned My Childhood Friend into a Girl | — | — | — |
| I Want to End This Love Game | April 14, 2026 | — | 12 |
| I Want to Escape from Princess Lessons | January 5, 2025 | — | 12 |
| I Want to Love You Till Your Dying Day | July 7, 2026 | — | 13 |
| I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability | April 2, 2024 | — | 12 |
| I'll Become a Villainess Who Goes Down in History | October 2, 2024 | — | 13 |
| I'll Live a Long Life to Dote on My Favorite Stepbrother! | January 6, 2026 | Television Kanagawa | 12 |
| I'm a Behemoth | January 4, 2025 | — | 12 |
| I'm a Curse Crafter, and I Don't Need an S-Rank Party! | — | — | — |
| I'm a Noble on the Brink of Ruin, So I Might as Well Try Mastering Magic | January 7, 2025 | — | 12 |
| I'm Dating a Dark Summoner | October 5, 2026 | — | — |
| I'm From Japan | April 2019 | — | — |
| I'm Getting Married to a Girl I Hate in My Class | January 3, 2025 | — | 12 |
| I'm Giving the Disgraced Noble Lady I Rescued a Crash Course in Naughtiness | October 4, 2023 | — | 12 |
| I'm Gonna Be An Angel! | April 7, 1999 | TV Tokyo | — |
| I'm in Love with the Villainess | October 3, 2023 | — | 12 |
| I'm Kodama Kawashiri | January 14, 2022 | Fuji Television | 24 |
| I'm Living with an Otaku NEET Kunoichi!? | January 5, 2025 | — | 24 |
| I'm Looking For a Zombie | October 3, 2026 | — | — |
| I'm Quitting Heroing | April 5, 2022 | — | 12 |
| I'm Standing on a Million Lives | October 2, 2020 | — | 12 |
| I'm the Evil Lord of an Intergalactic Empire! | April 6, 2025 | — | 12 |
| I'm the Villainess, So I'm Taming the Final Boss | October 1, 2022 | — | 12 |
| I've Been Killing Slimes for 300 Years and Maxed Out My Level | April 10, 2021 | — | 24 |
| I've Somehow Gotten Stronger When I Improved My Farm-Related Skills | October 1, 2022 | — | 12 |
| I-Chu | January 6, 2021 | — | 12 |
| Ice | May 25, 2007 | — | 3 |
| Ichigo Aika | January 5, 2026 | — | 12 |
| Ichijōma Mankitsu Gurashi! | April 12, 2026 | — | 12 |
| Iczer Girl Iczelion | January 27, 1995 | — | 2 |
| Iczer Reborn | September 25, 1990 | — | 6 |
| Id – Invaded | January 5, 2020 | — | 13 |
| ID-0 | April 9, 2017 | — | 12 |
| Idaten Jump | October 1, 2005 | — | 52 |
| Idol Angel Yokoso Yoko | April 2, 1990 | TV Setouchi | 43 |
| Idol Defense Force Hummingbird | September 1, 1993 | — | 4 |
| Idol Densetsu Eriko | April 3, 1989 | TV Setouchi | 51 |
| Idol Memories | October 3, 2016 | AT-X | — |
| Idol Time PriPara | April 4, 2017 | — | — |
| Idolish7 | December 31, 2017 | — | 62 |
| Idolls! | January 8, 2021 | — | 10 |
| IDOLM@STER SideM | October 1, 2017 | — | 13 |
| Idolmaster: Xenoglossia | April 4, 2007 | — | 26 |
| Idoly Pride | January 10, 2021 | — | 12 |
| If Her Flag Breaks | April 6, 2014 | — | 13 |
| If I See You in My Dreams | April 21, 1998 | — | 3 |
| If I See You in My Dreams | December 1, 1998 | — | 16 |
| If It's for My Daughter, I'd Even Defeat a Demon Lord | July 4, 2019 | — | 12 |
| If My Favorite Pop Idol Made It to the Budokan, I Would Die | January 10, 2020 | — | 12 |
| Igano Kabamaru | October 20, 1983 | Nippon Television | 24 |