Nintendo Entertainment Analysis and Development (or EAD; formerly Research & Development Team 4) is the largest division inside Nintendo. The famed developer Shigeru Miyamoto serves as the head of the EAD studios and is credited as producer for each game released from EAD, with varying degrees of involvement. EAD is best-known for its work on games in the Mario, The Legend of Zelda, Pikmin, F-Zero and Donkey Kong franchises.
In 2004, Nintendo underwent a corporate restructuring in which Nintendo Research & Development 1 and Nintendo Research & Development 2 were merged under the EAD banner. Nintendo EAD is itself split into five separate teams who work concurrently on different projects.