| Kaitou Akyua ~Kutsujoku no Matsuro~ | 2017-04-15 | - |
| Kaitou Apricot | 2002-03-15 | 6.60 (8) |
| Kaitou Apricot Gaiden Mitsuru Hen | 2002-11-23 | - (1) |
| Kaitou L☆lita & You ~Shimai Kankin Nikuasobi~ | 2005-04-15 | 5.80 (19) |
| Kaitou Tenshi Twin Angel ~Maboroshi no Shoujo~ | 2009-01-01 | - (4) |
| Kaitou Tenshi Twin Angel ~Soshite Shinwa no Otome-tachi~ | 2017-01-19 | - (2) |
| Kaitou Tenshi Twin Angel ~Toki to Sekai no Labyrinth~ | 2011-08-25 | 7.10 (7) |
| Kaitou X Koi no Yokokujou | 2011-01-06 | 6.70 (66) |
| Kaitou Z ~Anata no Heart o Nusumimasu~ | 2000-09-29 | - (1) |
| Kaiwa | 2022-07-09 | - (1) |
| Kaiwa 2 | 2024-04-22 | - (4) |
| Kaiware! | 2006-07-28 | 6.10 (7) |
| Kaiyouseibutsu-musume ni ○○sareru | 2023-06-07 | - |
| Kaizoku Health -Moshimo Kanojo-tachi ga Fuuzokujou Nara?- | 2013-04-05 | 6.90 (20) |
| Kaizoku Musume-gari ~Nami Ryoujoku Taikyuu "1-oku Berry Tameru Made wa"~ | 2012-02-04 | 5.70 (5) |
| Kaizoku Ouhime Alfiana ~Inda to Shokushu no Yuureisen~ | 2007-09-15 | 6.70 (9) |
| Kaizoku Oukan | 2001-04-20 | 6.50 (12) |
| Kaizou Shoujo ~Robokko to no Ichaicha Seikatsu!~ | 2013-09-27 | 5.80 (6) |
| Kajgrad | 2021-05-26 | 6.00 (8) |
| Kajiri Kamui Kagura | 2011-09-30 | 8.40 (379) |
| Kajitsu | 2002-11-29 | - (2) |
| Kajitsu no Koi | 2020-05-10 | - |
| Kajou Kagaku Keibitai: Bouei Man | 2022-01-15 | - (1) |
| Kajuu 100% | 2018-08-31 | 7.60 (122) |
| Kajuu Sentai ☆ Fruits Ranger | 2012-03-23 | 5.30 (45) |
| Kak v tom fil'me, tol'ko sovsem po-drugomu | 2023-08-30 | - (2) |
| Kakan no Renkinjutsushi ~Atelier Life~ | 2015-07-30 | - (1) |
| Kakegurui H.E. | 2023-09-17 | - (1) |
| Kakegurui Pervert Edition | 2022-12-05 | - (3) |
| Kakenuke★Seishun Sparking! | 2020-08-28 | 7.40 (712) |
| Kakeochi | 2019-04-26 | 5.90 (29) |
| Kakera Fandisc | 2003-12-28 | - (3) |
| Kakeru Koto no Nai Futokutei | 2019-12-24 | - |
| Kaketa En Motsureru Ito -Shingetsu no Akari- | 2010-12-12 | - (1) |
| Kaketa Tsuki wa Modoranai | 2006-07-28 | 5.90 (9) |
| Kaki Fry ni Tartar o | 2009-06-15 | - |
| Kakka to Ma no Tsuku Present!? | 2005-03-13 | - |
| Kakko Warui Honka-sama | 2023-11-22 | - (1) |
| Kakkoii Kotetsu-san wa Imasen! | 2013-08-12 | - |
| Kako e no Katsubou | 2014-06-09 | - |
| Kako no Bourei | 2017-08-05 | - |
| Kako no Ijime | 2021-10-14 | - |
| Kako no Koi | - | - |
| Kakoi | 2012-08-10 | 6.10 (24) |
| Kakosatsu | 2006-12-23 | - (3) |
| Kakumei no Hi ~One Day~ | 2001-07-01 | - |
| Kakure Ecchi | 2004-03-19 | 6.30 (5) |
| Kakurenbo | 2007-05-20 | - (1) |
| Kakurenbo Gakuen | 2009-12-18 | - |
| Kakurenbo ~Futari Dake no Himitsu no Jikan~ | 2014-07-25 | 7.30 (155) |