| Yagai Gasshuku | 2007-08-05 | - |
| Yagai Roshutsu Chuukei III | 2015-12-18 | - |
| Yagai de Onaka o Kudashite Shimatta Joshikousei no Matsuro... ~Omorashi Novel Game~ | 2022-07-15 | - |
| Yagami Sanchi no Katei no Jijou | 2002-04-03 | - |
| Yagate Boku no Otozureru kouen | 2012-03-08 | - |
| Yagate Chiriyuku Kagami no Hana e | 2025-06-20 | 5.70 (11) |
| Yagate Hi wa Ochiru | 2026-02-20 | - |
| Yagi Shoukougun | 2024-08-12 | - |
| Yagi no Ongaeshi | 2008-04-20 | - (2) |
| Yagi-kun wa Kouhai-kun | 2022-01-22 | - |
| Yagi-san Yuubin | 2014-04-25 | - |
| Yahari Game demo Ore no Seishun Love Come wa Machigatteiru. | 2013-09-19 | 7.30 (82) |
| Yahari Game demo Ore no Seishun Love Come wa Machigatteiru. Kan | 2023-04-26 | 7.20 (28) |
| Yahari Game demo Ore no Seishun Love Come wa Machigatteiru. Zoku | 2016-10-27 | 7.30 (96) |
| Yajuu | 2013-06-11 | 6.80 (5) |
| Yajuu Kyoushi | 2010-07-23 | 6.50 (13) |
| Yajuu Megane ~Hyouhen Suru Shachou no Himitsu~ | 2012-08 | - |
| Yajuu Sentai Schwarkan | 2003-05-09 | - (1) |
| Yaka no Shitone | 1999-11-26 | - |
| Yakan Shinryou Karte 2 ~Nurse Tokubetsu Choukyou~ | 2011-04-28 | 7.20 (10) |
| Yakan Shinryou ~Nurse Choukyou Karte~ | 2007-09-28 | 7.20 (15) |
| Yakan Shinsatsu | 2007-05-16 | - (2) |
| Yakata Jukujo ~The Immoral Residence~ | 2007-03-23 | 7.50 (66) |
| Yakata ~Kannou Kitan~ | 2013-10-25 | 7.40 (186) |
| Yakeppachi Sekai Seifuku | 2019-07-19 | - |
| Yakezake Nonderu Tonakai-san | 2020-12-23 | - |
| Yakimochi Imouto to Ecchi na Nichijou | 2023-03-25 | - (1) |
| Yakimochi Kanojo no Ichizu na Koi | 2016-06-24 | 6.80 (49) |
| Yakimochi Stream | 2014-09-26 | 7.10 (212) |
| Yakimochi Twin Bell | 2004-11-26 | 6.60 (5) |
| Yakimochi-yaki na Imouto wa, Itsudemo Dokodemo Hatsujouchuu♥ | 2012-02-24 | 6.80 (38) |
| Yakin Byoutou | 1999-12-22 | 6.70 (147) |
| Yakin Byoutou Ni | 2004-01-15 | 7.30 (36) |
| Yakin Byoutou Zero | 2012-01-27 | 6.40 (32) |
| Yakin Byoutou ~Tokubetsu-ban~ | 2000-12-22 | 5.90 (6) |
| Yakin Jantou | 2002-07-26 | 6.00 (13) |
| Yakin Jantou Ni | 2005-12-09 | 6.20 (15) |
| Yakiniku Kuripuupi | 2003-05-16 | 4.50 (9) |
| Yakitate Croissant ~Autumn Leaf no 3 Shimai~ | 2005-02-25 | 6.80 (5) |
| Yakouchuu | 1995-06-16 | 5.90 (8) |
| Yakouchuu II ~Satsujin Kouro~ | 1999-10-22 | - (1) |
| Yaku 1-pun de Crystal Satana no Jinbutsu Shoukai! | 2020-04-04 | - |
| Yaku Tsuu ~Noroi no Game~ | 1997-02-07 | - (3) |
| Yakuchu! ~Tadaima Biyaku Kaihatsuchuu~ | 2007-04-27 | 6.50 (8) |
| Yakumo Ikka to no Dokidoki Kyoudou Seikatsu | 2018-12-30 | - (1) |
| Yakusoku | 2003-12-03 | - |
| Yakusoku | 1997-07-25 | - (4) |
| Yakusoku | 2021-05-09 | - (1) |
| Yakusoku Hitotsu, Uso Afureru Kurai. | 2022-06-01 | - |
| Yakusoku mo Zenbu Anata no Sei | 2024-03-12 | - |