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| Aki High! | - | - |
| Aketekudasai, Koyagi-san | 2024-05-01 | 5.90 (5) |
| Aker Fern 2 | 2025-09-30 | - (2) |
| Akeno no Yosuga -Twilight Loop- | 2026-06 | - |
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| Akenai Yoru ga Kuru Mae ni | 2010-11-14 | 6.70 (22) |
| Akeiro ni Somaru, Utsukushiki Yashiro de | 2024-08-24 | - |
| Akeiro Kaikitan | 2016-03-25 | 8.00 (330) |
| Akechi to Iu Otoko - A Danshaku-tei Satsujin Jiken | TBA | - |
| Ake no Hanayome | 2019-03-01 | - (1) |
| Akazukin-kun to Ookami-chan | 2012-10-21 | - (2) |
| Akazukin wa Yumewomiru | 2021-05-05 | - (1) |
| Akazukin wa Nani mo Shiranai | 2024-06-18 | - (1) |
| Akazukin to Mayoi no Mori | 2011-05-20 | 6.70 (187) |
| Akazawa Red Maniax "YukaMitsu" | 2008-10-01 | - (2) |
| Akazawa Red Maniax "Izutsun" | 2009-02-06 | - (2) |
| Akazawa Red Maniax "Izudere" | 2009-04-10 | - (2) |
| Akaya Akashiya Ayakashino | 2011-05-03 | 7.80 (145) |
| Akatsukizukiyo | 2004-05-29 | - |
| Akatsuki no Majo ~Kirisaki Lily no Shou~ | - | - |
| Akatsuki no Majo 2 ~Necromancer Haruto no Shou~ | - | - |
| Akatsuki no Lily Philia | 2017-12-22 | - (1) |
| Akatsuki no Goei ~Tsumibukaki Shuumatsuron~ | 2010-04-22 | 8.00 (664) |
| Akatsuki no Goei ~Principal-tachi no Kyuujitsu~ | 2008-12-25 | 7.20 (590) |
| Akatsuki no Goei | 2008-03-27 | 7.40 (1240) |
| Akatsuki no Ganshou | 1999-05-28 | - (2) |
| Akatsuki ni Somaru Kimi no Koe | 2025-07-28 | - |
| Akatsuki Yureru Koi Akari | 2020-12-25 | 7.80 (262) |
| Akatsuki Luna ga Michiru Toki | 2026-04-16 | - |
| Akatsuki Junrei | 2009-08-19 | - |
| Akatsuki Automata | 2019-08-24 | - |
| Akatsuka Koukou Kaiitan | 2016 | - |
| Akatsubaki to Shirotsubaki | 2020-10 | - (1) |
| Akatoki! -Yume Koso Masare Koi no Mahou- | 2010-12-23 | 7.30 (77) |
| Akashic's Library | 2025-04-25 | - |
| Akashic Records ～櫻の戦箱～ | - | - (1) |
| Akasha Dreams | - | 5.50 (5) |
| Akasha Academy | 2024-01-13 | - |
| Akash: Path of the Five | 2019-06-25 | 6.10 (43) |
| Akasen Gairo ~Shouwa 33 Nen no Hatsuyuki~ | 2007-11-30 | 6.80 (32) |
| Akaruku Tanoshii Saimin Gakuen ~Ero Kousoku o Ippai Tsukuttara Chou Riajuu ni Nareta!~ | 2013-10-04 | 6.50 (46) |
| Akarui Seikyouiku ~Boku to Classmate to no Ecchi na Gakkou Seikatsu~ | 2012-09-21 | - (1) |
| Akarui Mirai -Wet and Messy 2nd Time- | 2003-12-19 | 6.90 (24) |
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| Akari to Matsuri no xxx Jijou. | 2022-08-16 | - |
| Akari to Aya Ijiri | 2004-08-30 | - (1) |
| Akari Teishoku | 2000 | - |
| Akanesasu Sekai de Kimi to Utau | 2017-04 | - (3) |