| Hutos - Hut on a Slope | — | KBS 2TV | — |
| Hyakka Ryōran | September 4, 2010 | — | 24 |
| Hyakka Ryōran: Samurai After | January 23, 2015 | — | 2 |
| Hyakki Yakōshō | April 7, 2026 | — | 12 |
| Hyakko | October 1, 2008 | — | 13 |
| Hyakushō Kizoku | July 7, 2023 | — | 12 |
| Hybrid Child | October 29, 2014 | — | 4 |
| Hybrid x Heart Magias Academy Ataraxia | July 5, 2016 | — | 12 |
| Hyouge Mono | April 7, 2011 | NHK BS Premium | 39 |
| Hyouka | April 22, 2012 | — | 22 |
| Hyper Police | April 3, 1997 | — | 25 |
| Hyper Positive Yogoremon | April 18, 2021 | — | 12 |
| Hyperdimension Neptunia: The Animation | July 12, 2013 | — | 12 |
| Hypnosis Mic: Division Rap Battle: Rhyme Anima | October 2, 2020 | — | — |
| Hyppo and Thomas | January 1, 1971 | — | 300 |
| Hyōga Senshi Gaislugger | April 12, 1977 | — | 20 |
| I Am Groot | August 5, 2022 | Disney+ | 10 |
| I Am the Greatest: The Adventures of Muhammad Ali | September 10, 1977 | NBC | 13 |
| I Am Weasel | July 22, 1997 | Cartoon Network | 79 |
| I Became a Legend after My 10 Year-Long Last Stand | July 6, 2026 | — | 12 |
| I Can't Understand What My Husband is Saying | October 3, 2014 | — | 26 |
| I Couldn’t Become a Hero, So I Reluctantly Decided to Get a Job | October 5, 2013 | Tokyo MX, AT-X | 12 |
| I Don't Like You at All, Big Brother! | January 9, 2011 | — | 12 |
| I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too | April 7, 2023 | — | — |
| 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 Spy | April 2003 | — | 52 |
| 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 Get You! Holidays | December 17, 2021 | Channel One Russia, Carousel, Mult, Okko | 26 |
| 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 an Animal | — | RTÉ 2 | — |
| 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 Joybo | — | — | — |
| 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 |