Information in the game database is updated periodically. Below, you'll find that information compiled as pertains to GungHo. The company may be involved as a publisher, developer or both.
PazuDora Z: Puzzle & Dragons Z [December 12, 2013]
Puzzle & Dragons: Super Mario Bros. Edition [April 29, 2015]
Puzzle & Dragons Z + Puzzle & Dragons: Super Mario Bros. Edition [May 22, 2015]
Puzzle & Dragons [December 12, 2012]
NadePro!! Kisama no Seiyuu Yatte Miro! [October 29, 2009]
Republique [March 22, 2016]
Cho Aniki Zero 
There are numerous companies in the industry, and their names change like the weather. The information above is not particular about the finer details. Acquisitions are common, so companies with no recent listings may still be developing games under a new name. For example, DMA Design currently has a Rockstar name. Do you know of a title that is not listed above but should be? Be sure and let a staff member know. You can contact staff if you click here.