| 1991-09 |
Established Prism Ltd. in Unumagawasaki-cho, Kagamihara City, Gifu Prefecture. |
| 1993-07 |
Established Prism Planning Ltd. in Unumamitsuike-cho, Kagamihara City, Gifu Prefecture. |
| 1993-07 |
Established our company. |
| 1994-11 |
Renamed Prism Planning Ltd. to Japan No.1 Software Ltd. |
| 1995-02 |
Released PlayStation® exclusive game 'Jigsaw World'. |
| 1995-07 |
Converted Japan No.1 Software Ltd. into a corporation. |
| 1995-09 |
Transferred Prism Ltd.'s development operations to Japan No.1 Software Inc. |
| 1998-12 |
Released PlayStation® exclusive game 'Marl Kingdom's Doll Princess'. |
| 2001-04 |
Started distribution of 'Rose Queen Land' (now Japan One GAMES) on the i-mode official site. |
| 2003-01 |
Released PlayStation® 2 exclusive game 'Disgaea: The Demon World Chronicles'. |
| 2003-07 |
Moved headquarters to Nakaoyagi-cho, Kagamihara City. |
| 2003-12 |
Established NIS America Inc. in California, USA. |
| 2007-06 |
Listed on the JASDAQ Stock Exchange (now Tokyo Stock Exchange JASDAQ Standard). |
| 2007-09 |
Made System Prism Co., Ltd. (Osaka) a wholly-owned subsidiary through 100% investment. |
| 2008-02 |
Moved headquarters to Tsukikawa-cho, Kagamihara City. |
| 2008-06 |
Released Nintendo DS exclusive game 'Disgaea: The Demon World Chronicles – Prince of the Demon World and the Red Moon'. |
| 2010-02 |
Established STUDIO ToOeuf Co., Ltd. in Kagamihara City, Gifu Prefecture. |
| 2010-04 |
Established Shishikuiya Co., Ltd. in Yokohama City, Kanagawa Prefecture. |
| 2010-08 |
Started distribution of the e-book 'Modern Mystery: The Trend God' on the App Store. |
| 2011-12 |
Established DION Entertainment Co., Ltd. in Toshima-ku, Tokyo. |
| 2011-12 |
Established DiOn Entertainment Co., Ltd. in Toshima Ward, Tokyo (changed name to Entertainment Support Co., Ltd. in February 2015, liquidated in February 2021). |
| 2012-10 |
Established the Osaka Development Office in Osaka City, Osaka Prefecture. |
| 2012-11 |
Established Nippon Ichi Software Asia Pte. Ltd. in Singapore. |
| 2012-12 |
Initiated internal open project. |
| 2014-06 |
Released the internal open project 'htoL#NiQ – Hotaru no Nikkī'. |
| 2015-01 |
Established Nippon Ichi Software Vietnam Co., Ltd. in Vietnam. |
| 2015-10 |
Released the internal open project 'Yoru Makai'. |
| 2016-07 |
Made Fog Co., Ltd. (Machida City, Tokyo) a wholly-owned subsidiary through 100% investment. |
| 2016-07 |
Made Fog Co., Ltd. (Machida City, Tokyo) a wholly-owned subsidiary through 100% investment (liquidated in March 2022). |
| 2017-03 |
Released the Nintendo Switch™ exclusive game 'Disgaea 5: The End of Destiny'. |
| 2018-05 |
Established Tanoshimi Team Co., Ltd. (now Tanoshimi Team Co., Ltd.) in Kakamigahara City, Gifu Prefecture. |
| 2019-12 |
Established System Soft Beta Co., Ltd. in Kakamigahara City, Gifu Prefecture. |
| 2022-11 |
Established Nagoya Graphic Studio Co., Ltd. in Kakamigahara City, Gifu Prefecture. |
