Nintendo Entertainment Analysis and Development (or EAD; formerly Research & Development Team 4) is the largest division inside Nintendo of Japan, under the management of Shigeru Miyamoto. This team mostly focuses on the development of games. In 1997, Miyamoto explained that twenty to thirty employees were devoted to each EAD title during the course of its development. He also disclosed the existence of a programming group within the division called SRD, a group of about two-hundred employees with proficiency in hardware development.