Nintendo Entertainment Analysis and Development (Ohga Shrugs)

Nintendo Entertainment Analysis and Development, more commonly known as Nintendo EAD, is Nintendo's largest division, with about 400 employees. It is considered the core of the company, and is responsible for the creation of some of its biggest games.

In 2004, Nintendo EAD underwent a major restructuring after Nintendo Research & Development members were assigned to the divison, which led to the division's current form.

Software Development Group No. 1
This Group is responsible for Nintendogs and Mario Kart games. Its producer is Hideki Konno, who has directed or produced every Mario Kart game except for Super Circuit and Double Dash.

Software Development Group No. 2
This group is responsible for the Animal Crossing series. Its producer is Katsuya Eguchi, who directed the original Animal Crossing.

Software Development Group No. 3
This group is responsible for both console and handheld Zelda games. Its producer is Eiji Aonuma, who has worked on the series since Ocarina of Time.

Software Development Group No. 4
This group is responsible for 2D Mario games. Its producer, Hiroyuki Kimura, was the designer of Metroid and Super Metroid.