| K-ON!! | Comedy,School Life | 26 |
| KARAS | Action,Drama,Fantasy,Sci-fi | 6 |
| KURAU Phantom Memory | Drama,Mecha,Psychological,School Life,Shounen | 24 |
| Kabuto OVA | Action,Adventure,Drama,Historical | 1 |
| Kachou Ouji | Adventure,Comedy,Sci-fi,Slice of Life | 13 |
| Kagaku Ninja-Tai Gatchaman | Action,Adventure,Fantasy,Shounen | 105 |
| Kage Kara Mamoru | Action,Comedy,Romance,Shounen | 12 |
| Kagihime | Fantasy,Magic | 13 |
| Kai Doh Maru | Action,Fantasy,Historical,Magic,Seinen | 1 |
| Kaiba | Romance,Sci-fi | 12 |
| Kaichou Wa Maid-Sama! | Comedy,Romance,School Life,Shoujo | 26 |
| Kaichuu! | Comedy,Gender Bender,School Life,Sports | 2 |
| Kaidan Restaurant | Adventure,Comedy,Fantasy,Horror,Mystery,Shounen,Supernatural | 23 |
| Kaikan Phrase | Drama,Romance | 44 |
| Kaiketsu Zorori | Adventure,Comedy | 52 |
| Kaitou Reinya | Comedy | 12 |
| Kakurenbo | Horror,Psychological,Supernatural | 1 |
| Kakyuusei 2 | Comedy,Drama,Romance | 13 |
| Kaleido Star: Legend Of Phoenix | Comedy,Drama,Shoujo | 1 |
| Kaleido Star: New Wings Extra Stage | Adventure,Comedy,Drama,Shoujo | 1 |
| Kaleido Star | Comedy,Drama,Fantasy,Shoujo,Sports | 51 |
| Kamen No Maid Guy | Action,Comedy,Ecchi | 12 |
| Kami Nomi Zo Shiru Sekai | Comedy,Harem,Romance,Shounen | 12 |
| Kamichama Karin | Comedy,Fantasy,Magic,School Life,Shoujo | 26 |
| Kamichu! | Comedy,Drama,Magic,Romance,Slice of Life,Supernatural | 16 |
| Kamikaze Kaitou Jeanne | Adventure,Comedy,Drama,Magic,Mystery,Romance | 44 |
| Kamisama Kazoku | Comedy,Drama,Fantasy,Romance | 13 |
| Kampfer | Action,Comedy,Ecchi,Romance,School Life,Supernatural | 13 |
| Kanamemo | Comedy,Yuri | 13 |
| Kannagi | Comedy,School Life,Shounen,Supernatural | 14 |
| Kannazuki No Miko | Drama,Magic,Mecha,Romance,Shoujo Ai,Shounen,Supernatural,Yuri | 12 |
| Kanokon: Manatsu No Daishanikusai | Comedy,Ecchi,Harem,Romance,Shounen,Supernatural | 2 |
| Kanokon | Comedy,Ecchi,Harem,Romance,Shounen,Supernatural | 12 |
| Kanon 2006 | Drama,Romance,Slice of Life,Supernatural | 24 |
| Kanon | Drama,Romance,Slice of Life,Supernatural | 13 |
| Karakuri Zoushi Ayatsuri Sakon | Horror,Mystery,Psychological,Shounen | 26 |
| Karin | Comedy,Horror,Psychological,Romance,Supernatural | 24 |
| Kashou No Tsuki | Fantasy,Historical,Romance,Shounen Ai,Supernatural | 2 |
| Kasimasi ~Girl Meets Girl~ | Comedy,Drama,Romance,Sci-fi | 13 |
| Katanagatari | Action,Adventure,Fantasy,Martial Arts,Seinen | 12 |
| Katekyo Hitman REBORN! | Action,Comedy,School Life,Shounen | 111 |
| Kawa No Hikari | Adventure | 1 |
| Kaze No Stigma | Action,Drama,Fantasy,Supernatural | 24 |
| Kaze No Tairiku | Action,Adventure,Fantasy,Shounen | 1 |
| Kekkaishi | Adventure,Comedy,Fantasy,Romance,Shounen,Supernatural | 52 |
| Kekko Kamen | Comedy,Ecchi | 4 |
| Kemono No Souja Erin | Drama,Fantasy | 50 |
| Kenkoo Zenrakei Suieibu Umishou | Comedy,Ecchi,School Life,Shounen,Sports | 13 |
| Keroro Gunsou | Comedy,Sci-fi,Shounen | 225 |
| Key The Metal Idol | Action,Drama,Mecha,Sci-fi,Shoujo | 15 |
| Kiba | Action,Adventure,Fantasy,Shounen | 51 |
| Kiddy Girl-AND | Ecchi,Fantasy | 24 |
| Kiddy Grade | Action,Ecchi,Mecha,Sci-fi | 24 |
| Kidou Keisatsu Patlabor | Action,Comedy,Mecha,Sci-fi | 47 |
| Kidou Shinsengumi Moeyo Ken TV | Adventure,Comedy,Supernatural | 13 |
| Kigeki | Historical,Seinen | 1 |
| Kigurumikku V3 | Comedy,Ecchi,Magic,Mecha,Shoujo | 3 |
| Kiki`S Delivery Service | Adventure,Drama,Fantasy,Supernatural | 1 |
| Kimagure Orange Road - I Want To Return To That Day | Comedy,Drama,Romance,Shounen,Slice of Life | 1 |
| Kimagure Orange Road OVA | Comedy,Drama,Magic,Romance,Slice of Life | 8 |
| Kimagure Orange Road: Summer's Beginning | Comedy,Drama,Ecchi,Fantasy,Magic,Romance,Shounen,Slice of Life | 1 |
| Kimagure Orange Road | Action,Comedy,Drama,Fantasy,Magic,Romance,School Life,Shounen,Slice of Life | 48 |
| Kimi Ga Nozomu Eien OVA ~Next Season~ | Drama,Romance | 4 |
| Kimi Ga Nozomu Eien | Drama,Romance,Shoujo,Slice of Life | 14 |
| Kimi Ni Todoke ( 2011 ) | Romance,School Life,Shoujo | 13 |
| Kimi Ni Todoke | Romance,School Life,Shoujo | 25 |
| Kimikiss Pure Rouge | Comedy,Romance,School Life,Slice of Life | 25 |
| King Of Bandit Jing | Adventure,Comedy,Fantasy,Sci-fi,Shounen | 13 |
| Kinnikuman | Action,Comedy,Martial Arts,Sci-fi,Shounen,Sports | 137 |
| Kino No Tabi | Action,Adventure,Drama,Fantasy,Slice of Life | 13 |
| Kirarin Revolution | Comedy,Drama,Romance,Shoujo | 153 |
| Kirepapa | Comedy,Drama,Shounen Ai,Yaoi | 2 |
| Kiss X Sis | Comedy,Ecchi,Romance,Shounen | 6 |
| Kiss X Sis (TV) | Comedy,Ecchi,Romance,Shounen | 12 |
| Kobato. | Adventure,Comedy,Fantasy,Romance,Shoujo | 24 |
| Kodomo No Jikan: Ni Gakki | Comedy,Ecchi,Lolicon,Romance,School Life | 3 |
| Kodomo No Jikan | Comedy,Ecchi,Romance,School Life | 12 |
| Kodomo No Omocha | Comedy,Drama,Romance,Shoujo | 102 |
| Koe De Oshigoto ! | Comedy,Ecchi,School Life,Seinen | 2 |
| Koharu Biyori | Comedy,Ecchi,Sci-fi | 3 |
| Koi Koi 7 | Comedy,Harem,Romance | 13 |
| Koihime Musou | Action,Adventure,Fantasy,Romance | 12 |
| Koisuru Boukun | Yaoi | 2 |
| Kokoro Toshokan | Comedy,Drama,Slice of Life | 13 |
| Konchu Monogatari Minashigo Hatchi | Adventure,Comedy,Drama | 91 |
| Konnichiwa Anne | Drama,Historical,Shoujo,Slice of Life | 39 |
| Kono Aozora Ni Yakusoku Wo | Drama,Harem,Romance,School Life | 13 |
| Kono Minikuku Mo Utsukushii Sekai | Comedy,Drama,Magic,Romance,Sci-fi,Shounen | 12 |
| Kore Wa Zombie Desu Ka ? | Action,Magic | 13 |
| Koutetsu Sangokushi | Action,Adventure,Fantasy,Historical,Shounen | 25 |
| Koutetsushin Jeeg | Mecha,Sci-fi | 13 |
| Kowarekake No Orgel | Comedy,Drama,Fantasy,Mecha,Psychological,Romance,Sci-fi,Slice of Life | 1 |
| Kuchu Buranko | Comedy,Psychological,Seinen | 11 |
| Kujibiki Unbalance TV | Comedy,Romance,School Life,Slice of Life | 12 |
| Kujibiki Unbalance(OVA) | Comedy,Romance | 3 |
| Kuragehime | Josei | 11 |
| Kurenai (2010) | Action,Comedy,Martial Arts,Shounen | 2 |
| Kurenai | Comedy,Drama,Seinen | 12 |
| Kurogane Communication | Action,Adventure,Drama,Sci-fi | 24 |
| Kurokami | Action,Drama,Shounen,Supernatural | 23 |
| Kuroshitsuji II | Action,Comedy,Fantasy,Shounen,Supernatural | 12 |
| Kuroshitsuji | Action,Comedy,Fantasy,Shounen,Supernatural | 25 |
| Kurozuka | Action,Drama,Historical,Horror,Romance,Sci-fi | 12 |
| Kuruneko | Comedy | 12 |
| Kusatta Kyoushi No Houteishiki | Romance,Shounen Ai | 2 |
| Kyo Kara Maoh | Adventure,Comedy,Fantasy | 78 |
| Kyoshiro To Towa No Sora | Drama,Fantasy,Mecha,Romance,School Life,Shoujo Ai,Shounen | 12 |
| Kyou Kara Maou OVA | Action,Adventure,Comedy,Drama,Fantasy | 5 |
| Kyou No Go No Ni OVA | Comedy,Ecchi,Romance,School Life | 4 |
| Kyou No Go No Ni | Comedy,Ecchi,Romance,School Life | 13 |
| Kyou, Koi O Hajimemasu | Romance,Shoujo | 1 |
| Kyou , Koi Wo Hajimemasu | Romance,Shoujo | 2 |
| Kyouran Kazoku Nikki | Comedy,Sci-fi | 26 |
