| Hiiro no Kakera: Ano Sora no Shita de | February 15, 2007 | Hiiro no Kakera |
| Hisui no Shizuku: Hiiro no Kakera 2 | August 9, 2007 | Hiiro no Kakera |
| Hiiro no Kakera | December 18, 2008 | Hiiro no Kakera |
| Desert Kingdom | May 27, 2010 | — |
| Moujuutsukai to Ouji-sama | June 24, 2010 | — |
| Clock Zero: Shūen no Ichibyō | November 25, 2010 | — |
| Hiiro no Kakera: Shin Tamayori Hime Denshou - Piece of Future | July 14, 2011 | Hiiro no Kakera |
| Soukoku no Kusabi: Hiiro no Kakera 3 - Asu e no Tobira | May 31, 2012 | Hiiro no Kakera |
| Sweet Fuse: At Your Side | June 14, 2012 | — |
| Shirahana no Ori: Hiiro no Kakera 4 | September 20, 2012 | Hiiro no Kakera |
| Koibana Days | June 20, 2013 | — |
| Shirahana no Ori: Hiiro no Kakera 4 - Shiki no Uta | September 5, 2013 | Hiiro no Kakera |
| Brothers Conflict: Precious Baby | April 7, 2016 | — |
| Piofiore: Fated Memories | 2018 | — |
| Winter's Wish: Spirits of Edo | July 29, 2021 | — |
| Shūen no Virche | October 7, 2021 | — |