D3 Publisher is a Japanese video game developer and publisher, founded in 1992. The company is known for creating and publishing a variety of games across multiple platforms, including consoles and mobile devices. Some of their notable titles include the Earth Defense Force series and Oneechanbara. In addition to game development, D3 Publisher collaborates with other companies to produce games and has a reputation for producing both original titles and adaptations. The company has contributed to the growth of the Japanese gaming industry by focusing on unique gameplay experiences and engaging storytelling.