D3Publisher, originally founded as D3 Inc., is a Japanese video game publisher known for publishing budget titles across various platforms, most notably the Simple 1500 and Simple 2000 series. The company has also published prominent franchises such as Earth Defense Force and Onechanbara. It became a subsidiary of Bandai Namco Holdings in 2009.
Established in the mid-1990s, the company built its early portfolio by licensing and publishing a diverse range of titles for home consoles. Among its early catalog and associated releases are the 1995 titles
The Oni Taiji and the strategy game
Z. As the PlayStation era expanded, the publisher secured rights to distribute popular arcade and simulation ports. This included the sci-fi shoot-'em-up
RayStorm and the train simulation game
Densha De Go in 1997.
By 1998, the company expanded its library further with the release of the action game
Frenzy, the basketball-themed fighting game
1 on 1, and the puzzle game
XI [Sai]. Through these releases, the publisher established a business model centered on high-volume, accessible software distribution. This strategy allowed the company to transition from local licensing deals to international publishing operations, eventually establishing North American and European branches to localize domestic properties for Western audiences.