D3 Publisher is the video game publisher responsible for the Simple 2000 Series, including titles like Vol. 4: Honkaku Shikou The Mahjong and Vol. 67: The Suiri. The company also published licensed titles such as Flushed Away and various utility software like Seimei Handan.
The publishing portfolio expanded significantly during the early 2000s by targeting niche markets and budget-conscious gamers through specialized software lines. Early utility and educational releases, such as the 2000 fortune-telling title
Seimei Handan and the 2001 investment guide
Si1-Jikan de Wakaru Kabushiki Toushi, established a footprint in non-traditional gaming markets. This strategy paved the way for a massive expansion into the budget software market, most notably through the Simple 2000 Series Vol. and Simple Wii Series Vol. lines, which eventually birthed the cult-classic Earth Defense Force franchise.
Within this budget ecosystem, diverse genres were explored. Notable releases included the 2005 romance title
Simple 2000 Series Vol. 71: The Fantasy Renai Adventure: Kanojo No Densetsu, Boku No Sekiban and the celebrity-endorsed trivia game
Simple 2000 Series Vol. 79: Akko ni Omakase! The Party Quiz. Alongside these budget Japanese releases, the publisher managed major international intellectual properties, securing the rights to distribute the video game adaptation of the DreamWorks animated film
Flushed Away across multiple platforms in 2006. This dual focus on low-cost domestic series and high-profile western licenses defined the publisher's mid-2000s output.