Nintendo Entertainment Analysis and Development (abbreviated to EAD) is the largest of Nintendo's internal divisions.
In 2004, after corporate restructuring, Nintendo Research and Development teams 1 and 2 were absorbed into EAD, which now comprises at least five teams of twenty to thirty employees. You can usually tell which team developed any given game from it's director. Aside from Shigeru Miyamoto and Takashi Tezuka, each team only works on their own individual title at any given time. It is assumed further unknown teams exist, or are formed temporarily for specific individual projects. There is also a programming group of two-hundred employees within the division known as SRD Co. Ltd.
In the summer of 2014, Nintendo opened a new headquarter in Kyoto and moved all of its internal development teams to that new building, known as the Nintendo Development Center. It houses all of the EAD Kyoto divisions as well as other development divisions.
On September 14 2015, Nintendo announced a large scale restructuring that formalizes the changes set in motion years prior by collecting all Kyoto development in one building. Nintendo EAD and Nintendo SPD have been merged into Nintendo EPD - Entertainment Planning & Development Division lead by General Manager Shinya Takahashi, previously GM of Nintendo SPD with Katsuya Eguchi (EPD Kyoto development) and Yoshiaki Koizumi (EPD Tokyo development) serving as Deputy General Managers.
Nintendo EAD Kyoto
Deputy General Manager: Katsuya Eguchi
Executive Officer: Takashi Tezuka
EAD Software Group No. 1
Group Manager: Hideki Konno
EAD Software Group No. 2
Group Manager: Hisashi Nogami
EAD Software Group No. 3
Group Manager: Eiji Aonuma
EAD Software Group No. 4
Group Manager: Hiroyuki Kimura
EAD Software Group No. 5
Group Manager: Tadashi Sugiyama
Nintendo EAD Tokyo
General Manager: Yoshiaki Koizumi
Group Manager: Takao Shimizu
Group Manager: Koichi Hayashida