commonly abbreviated as Nintendo EAD and formerly known as Nintendo Research & Development No.4 Department (abbreviated as Nintendo R&D4), was the largest software development division within the Japanese video game company Nintendo. It was preceded by the Creative Department, a team of designers with backgrounds in art responsible for many different tasks, to which Shigeru Miyamoto and Takashi Tezuka originally belonged. Both served as managers of the EARD studios and were credited in every game developed by the division, with varying degrees of involvement. Nintendo EAD was best known for its work on games in the Donkey Kong, Mario, The Legend of Zelda, F-Zero, Star Fox, Animal Crossing, Pikmin and Wii series.
Following a large company restructuring after the death of company president Satoru Iwata, the division merged with Nintendo's Software Planning & Development division in September 2015, becoming Nintendo Entertainment Planning & Development.
During the 1970s, when Nintendo was still predominantly a toy company, it decided to expand into interactive entertainment and the video game industry. Several designers were hired to work under the Creative Department, which, at the time, was the only game development department within Nintendo. Among these new designers were Makoto Kano, who went on to design various Game & Watch games, and Shigeru Miyamoto, who would create various Nintendo franchises. In 1972, the department was renamed to Research & Development Department; it had about 20 employees. The department was later consolidated into a division and separated into three groups, Nintendo R&D1, R&D2 and R&D3.
Around 1983/1984, in the wake of Donkey Kong'''s commercial success, a game designed by Shigeru Miyamoto, Hiroshi Imanishi oversaw the creation of Research & Development No. 4 Department (commonly abbreviated to Nintendo R&D4), as a new development department dedicated to developing video game titles for dedicated consoles, complementing the other three existing departments in the Nintendo Manufacturing Division, green-lit by then-Nintendo president Hiroshi Yamauchi.