| Title | Released | Role | As | Note |
| Summer Album | 1998-08-16 | Scenario | Kataoka Tomo | |
| Eien | 1998-12-30 | Scenario | Kataoka Tomo | |
| Eien | 1998-12-30 | Artist | Kataoka Tomo | |
| Duette | 1999-08-15 | Scenario | Kataoka Tomo | |
| Duette 2 | 2000-01-09 | Scenario | Kataoka Tomo | |
| White ~Setsunasa no Kakera~ | 2000-01-28 | Scenario | Kataoka Tomo | Izumi and Chinami's routes |
| White ~Setsunasa no Kakera~ | 2000-01-28 | Director | Kataoka Tomo | |
| White ~Setsunasa no Kakera~ | 2000-01-28 | Staff | Kataoka Tomo | ED Lyrics |
| Gin'iro | 2000-08-31 | Scenario | Kataoka Tomo | Chapter 1, Chapter 5 Second Half, Isuna Hen |
| Gin'iro | 2000-08-31 | Director | Kataoka Tomo | |
| Gin'iro | 2000-08-31 | Staff | Kataoka Tomo | Planning, supervision, Complete Edition Theme Song lyrics |
| Duette"A" | 2000-11-11 | Scenario | Kataoka Tomo | |
| Mizuiro | 2001-04-13 | Scenario | Kataoka Tomo | Hiyori route |
| Mizuiro | 2001-04-13 | Director | Kataoka Tomo | |
| Mizuiro | 2001-04-13 | Staff | Kataoka Tomo | OP and insert song lyrics |
| Mizuiro CS edition | 2001-04-13 | Staff | Kataoka Tomo | Insert song "Scarlet" lyrics |
| Mizuiro Remake | 2001-04-13 | Director | Kataoka Tomo | |
| NekoNeko Fan Disc | 2002-01-25 | Scenario | Kataoka Tomo | |
| NekoNeko Fan Disc | 2002-01-25 | Director | Kataoka Tomo | |
| NekoNeko Soft Okaeshi CD 3 | 2002-04-13 | Scenario | Kataoka Tomo | |
| NekoNeko Soft Okaeshi CD 4 | 2002-09-24 | Scenario | Kataoka Tomo | |
| Aka | 2003-06-13 | Scenario | Kataoka Tomo | Chapter 1 & 4 |
| Aka | 2003-06-13 | Director | Kataoka Tomo | |
| Aka | 2003-06-13 | Staff | Kataoka Tomo | OP/ED, Inserts lyrics (except "Omoi ~Kaze ni Mau Shirube~") |
| NekoNeko Fan Disc 2 | 2003-12-12 | Scenario | Kataoka Tomo | |
| NekoNeko Fan Disc 2 | 2003-12-12 | Director | Kataoka Tomo | |
| Lamune | 2004-07-30 | Scenario | Kataoka Tomo | Nanami and Hiromi (PS2) routes |
| Lamune | 2004-07-30 | Director | Kataoka Tomo | |
| Lamune | 2004-07-30 | Staff | Kataoka Tomo | OP, ED lyrics |
| 120 En no Haru | 2005-02-24 | Scenario | Kataoka Tomo | |
| 120 En no Haru | 2005-02-24 | Director | Kataoka Tomo | |
| 120 En no Haru | 2005-02-24 | Staff | Kataoka Tomo | Lyrics for EDs "120 En no Haru", "120 En no Natsu", "120 En no Fuyu" |
| Sanarara | 2005-04-29 | Scenario | Kataoka Tomo | Chapter 1 "Nozomi" |
| Sanarara | 2005-04-29 | Director | Kataoka Tomo | |
| Sanarara Sanarara R | 2005-04-29 | Staff | Kataoka Tomo | Plot |
| NekoNeko Soft Okaeshi CD 6 | 2005-07-26 | Scenario | Kataoka Tomo | 120 En no Natsu sidestory |
| narcissu | 2005-08-02 | Scenario | Kataoka Tomo | |
| narcissu | 2005-08-02 | Director | Kataoka Tomo | |
| narcissu | 2005-08-02 | Staff | Kataoka Tomo | "Narcissu ~Setsumi's Theme~" lyrics |
| Scarlett | 2006-05-26 | Scenario | Kataoka Tomo | Chapters 1, 2, 4 |
| Scarlett | 2006-05-26 | Director | Kataoka Tomo | |
| Scarlett | 2006-05-26 | Staff | Kataoka Tomo | PC OP lyrics |
| Natsumegu | 2007-02-02 | Staff | Kataoka Tomo | OP lyrics, special thanks |
| narcissu -SIDE 2nd- | 2007-05-15 | Scenario | Kataoka Tomo | |
| narcissu -SIDE 2nd- | 2007-05-15 | Director | Kataoka Tomo | |
| Reconquista | 2007-06-22 | Staff | Kataoka Tomo | Special thanks |
| Nagisa no | 2007-12-14 | Staff | Kataoka Tomo | OP lyrics |
| Amber Quartz | 2009-01-23 | Scenario | Kataoka Tomo | "Another side stories" novel |
| narcissu 3rd -Die Dritte Welt- | 2009-04-27 | Scenario | Kataoka Tomo | Chapter "Chiisana Irisu" |
| Sorairo | 2009-09-18 | Scenario | Kataoka Tomo | Tsubame route |
| Sorairo | 2009-09-18 | Director | Kataoka Tomo | |
| Sorairo | 2009-09-18 | Staff | Kataoka Tomo | Lyrics |
| NekoNeko Fan Disc 3 | 2010-02-26 | Scenario | Kataoka Tomo | |
| narcissu: Himeko's Epilogue | 2010-06-24 | Scenario | Kataoka Tomo | |
| narcissu Zero | 2010-06-24 | Scenario | Kataoka Tomo | |
| narcissu Zero | 2010-06-24 | Staff | Kataoka Tomo | Creator |
| White ~Blanche Comme la Lune~ | 2011-04-08 | Scenario | Kataoka Tomo | Marica's route |
| White ~Blanche Comme la Lune~ | 2011-04-08 | Director | Kataoka Tomo | |
| White ~Blanche Comme la Lune~ | 2011-04-08 | Staff | Kataoka Tomo | ED lyrics |
| White Chokotto Fandisc | 2011-06-17 | Scenario | Kataoka Tomo | |
| Yukiiro ~Sora ni Rokka no Sumu Machi~ | 2012-04-27 | Scenario | Kataoka Tomo | Miyuki route |
| Yukiiro ~Sora ni Rokka no Sumu Machi~ | 2012-04-27 | Staff | Kataoka Tomo | OP lyrics |
| Owaru Sekai to Birthday | 2012-07-27 | Scenario | Kataoka Tomo | Misaki (I Am Legend), After 17th |
| Owaru Sekai to Birthday | 2012-07-27 | Staff | Kataoka Tomo | Special thanks |
| Neko Puchi Fan Disc | 2012-08-10 | Scenario | Kataoka Tomo | |
| Futagoza no Paradox | 2013-06-28 | Staff | Kataoka Tomo | Special thanks |
| Soshite Kirameku Otome to Himitsu⁵ | 2013-11-29 | Director | Kataoka Tomo | |
| Soshite Kirameku Otome to Himitsu⁵ | 2013-11-29 | Staff | Kataoka Tomo | OP lyrics |
| Mahjong 2014 | 2014-01-31 | Scenario | Kataoka Tomo | |
| Ame no Marginal | 2014-12-30 | Scenario | Kataoka Tomo | |
| Sumire | 2015-05-29 | Scenario | Kataoka Tomo | Sumire, Akari, NetWorld |
| Sumire | 2015-05-29 | Staff | Kataoka Tomo | Insert song "Sumire" lyrics |
| Neko Puchi Fandisc Sumire | 2015-08-14 | Scenario | Kataoka Tomo | |
| narcissu Sumire | 2015-12-31 | Scenario | Kataoka Tomo | |
| Lamune 2 | 2017-01-27 | Scenario | Kataoka Tomo | |
| Lamune 2 | 2017-01-27 | Director | Kataoka Tomo | |
| Lamune 2 | 2017-01-27 | Staff | Kataoka Tomo | OP lyrics |
| Ruri no Kasane ~Imouto Monogatari~ | 2017-10-27 | Scenario | Kataoka Tomo | |
| Ruri no Kasane ~Imouto Monogatari~ | 2017-10-27 | Director | Kataoka Tomo | |
| Fuyu no Polaris | 2017-12-29 | Scenario | Kataoka Tomo | Winter Polaris |
| Fuyu no Polaris Append Disc teki na no | 2018-08-10 | Scenario | Kataoka Tomo | Tsubaki Story |
| NekoNeko Fan Disc 4 | 2018-12-21 | Scenario | Kataoka Tomo | |
| Christmas Tina -Utakata Toukei- | 2019-12-20 | Scenario | Kataoka Tomo | |
| Christmas Tina -Utakata Toukei- | 2019-12-20 | Staff | Kataoka Tomo | Drafts, OP lyrics |
| Christmas Tina -Utakata Toukei- Heping Moshi Lu | 2019-12-20 | Scenario | Kataoka Tomo | |
| Christmas Tina -Utakata Toukei- Heping Moshi Lu | 2019-12-20 | Staff | Kataoka Tomo | Original story, script, voice acting direction |
| Kami no Kuni no Mahoutsukai | 2022-01-28 | Scenario | Kataoka Tomo | |
| Kami no Kuni no Mahoutsukai | 2022-01-28 | Director | Kataoka Tomo | |
| Kami no Kuni no Mahoutsukai | 2022-01-28 | Staff | Kataoka Tomo | Plot; Theme song, INS "Yosugara no Voyage", "120 En no Haru", "Mizuiro" lyrics |
| SHINJUKU SOUMEI | 2024-05-24 | Scenario | Kataoka Tomo | |
| Koi Shikaru-beki ~Mayoiga kara no Tegami~ | 2026 | Scenario | Kataoka Tomo | |
| Koi Shikaru-beki ~Mayoiga kara no Tegami~ | 2026 | Director | Kataoka Tomo | |
| Seikimatsu no Shi | 2026 | Scenario | Kataoka Tomo | |