| Akatsuka Koukou Kaiitan | 2016 | - |
| Akatsuki Automata | 2019-08-24 | - |
| Akatsuki Junrei | 2009-08-19 | - |
| Akatsuki Luna ga Michiru Toki | 2026-04-16 | - |
| Akatsuki Yureru Koi Akari | 2020-12-25 | 7.80 (262) |
| Akatsuki ni Somaru Kimi no Koe | 2025-07-28 | - |
| Akatsuki no Ganshou | 1999-05-28 | - (2) |
| Akatsuki no Goei | 2008-03-27 | 7.40 (1240) |
| Akatsuki no Goei ~Principal-tachi no Kyuujitsu~ | 2008-12-25 | 7.20 (590) |
| Akatsuki no Goei ~Tsumibukaki Shuumatsuron~ | 2010-04-22 | 8.00 (664) |
| Akatsuki no Lily Philia | 2017-12-22 | - (1) |
| Akatsuki no Majo 2 ~Necromancer Haruto no Shou~ | - | - |
| Akatsuki no Majo ~Kirisaki Lily no Shou~ | - | - |
| Akatsukizukiyo | 2004-05-29 | - |
| Akaya Akashiya Ayakashino | 2011-05-03 | 7.80 (145) |
| Akazawa Red Maniax "Izudere" | 2009-04-10 | - (2) |
| Akazawa Red Maniax "Izutsun" | 2009-02-06 | - (2) |
| Akazawa Red Maniax "YukaMitsu" | 2008-10-01 | - (2) |
| Akazukin to Mayoi no Mori | 2011-05-20 | 6.70 (187) |
| Akazukin wa Nani mo Shiranai | 2024-06-18 | - (1) |
| Akazukin wa Yumewomiru | 2021-05-05 | - (1) |
| Akazukin-kun to Ookami-chan | 2012-10-21 | - (2) |
| Ake no Hanayome | 2019-03-01 | - (1) |
| Akechi to Iu Otoko - A Danshaku-tei Satsujin Jiken | TBA | - |
| Akeiro Kaikitan | 2016-03-25 | 8.00 (330) |
| Akeiro ni Somaru, Utsukushiki Yashiro de | 2024-08-24 | - |
| Akenai Yoru ga Kuru Mae ni | 2010-11-14 | 6.70 (22) |
| Akeno Delusion | 2024-01-31 | - (1) |
| Akeno no Yosuga -Twilight Loop- | TBA | - |
| Aker Fern 2 | 2025-09-30 | - (2) |
| Aketekudasai, Koyagi-san | 2024-05-01 | 5.90 (5) |
| Aki High! | - | - |
| Aki Uso -The Only Neat Thing To Do- | 2016-11-25 | 7.00 (116) |
| Aki no Kaerimichi | 2023-11-18 | - |
| Aki no Kodachi -The end of the last autumn- | 2010-11-27 | - |
| Aki no Sakura no Fantasian | 2005-11-13 | - |
| Aki no Semi | 2015-10-12 | - |
| Aki no Urara no Gaiden Mayu no Osanazuma Nikki | 2007-08-17 | 6.80 (18) |
| Aki no Urara no ~Akaneiro Shoutengai~ | 2007-01-26 | 7.10 (43) |
| Akiba Chronicle | 2014-01-03 | - (1) |
| Akiba Kihei Stranger | 2004-01-10 | - |
| Akiba Sentai! Engelaver | 2011-03-31 | 6.50 (5) |
| Akiba de Ocha Shiyo! | 2003-07-18 | - (2) |
| Akibakei Kanojo | 2003-10-24 | 6.80 (62) |
| Akibako ~"Shiritsu Akihabara Gakuen" Fandisk~ | 2003-12-19 | 6.40 (7) |
| Akibito | 2007-09-10 | - (1) |
| Akiha-sama Choukyou Keikaku | 2001-09-01 | - |
| Akihabara Hot Love Inception | 2001 | - |
| Akiiro Ouka ~Akiiro Renka Fandisc~ | 2005-08-12 | 6.50 (18) |
| Akiiro Renka | 2005-02-25 | 6.90 (40) |