Nintendo Entertainment Analysis and Development

Nintendo Entertainment Analysis and Development (or EAD; formerly Research & Development Team 4) is the largest division inside Nintendo. 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 their work on games in the Mario, The Legend of Zelda, Pikmin, and Donkey Kong franchises.

In 2004 Nintendo underwent a corporate restructuring, in which Nintendo Research and 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.