|2006 June||Established as Join Inc. at Ikebukuro, Toshima-ku, Tokyo.|
|2008 May||Company name was changed to ONE-UP Inc.|
|2009 June||Browser game “Browser 3 Kingdoms” was launched.|
|2010 May||Browser game “Sengoku IXA” was launched.|
|2010 October||Browser game “Browser Harvest Moon” was launched.|
|2011 October||Office was relocated to Ginza in Chuo-ku, Tokyo.|
|2012 March||DFQ Inc. has merged with ONE-UP Inc.|
|2012 August||Browser game “Megami Engage!” was launched.|
Merged with G-Mode.
Changed company name to G-Mode.
Moved main office to Shinjuku, Tokyo.
|2015 April||A subsidiary by Marvelous Inc.|
Moved main office to Shinagawa, Tokyo.