The story
The Nintendo Special Planning & Development team originated from former Nintendo R&D2 staff, and was mainly responsible for ports and in-house development for low profile hardware, such as the Pokémon Mini and the Super Famicom Satellaview service. Most of the software developed by this group has remained domestic having hardly ever seen release outside Japan. The original general manager, Satoshi Yamato, produced all of the software which included in-house software for the Game Boy Advance, and the e-Reader. The group also created mechanical devices and peripherals like the Pokéwalker and Pokémotion. The last general manager, Masaru Shimomura described the Mechanical Design Group as a small creative unit that has a hardware and a software team working jointly together to create innovative products.
In 2008, Nintendo SPD was renamed to Nintendo Network Service Development, creating the Network Planning Group alongside it. In 2011, the Nintendo NSD development team was consolidated into a division and was renamed to Nintendo Network Business & Development, appointing Masaru Shimomura as manager. Following the change, the Nintendo Network Business Department was created. The department contained two different groups: the former Mechanical Design Group, which was responsible for developing software titles and peripherals, as well the Network Software Development Group, which was responsible for developing Nintendo Network services. In 2012, the Software Environment Development Department was created, which developed Software Development Kits (SDKs), among experimental technologies.
In 2013, the division was renamed to Nintendo System Development Division. Nintendo consolidated the Nintendo Network Business Department into a department named Network Development & Operations Department which was responsible for handling Nintendo Network service programming in cooperation with Nintendo Network Service Database. With the change, the Mechanical Design Group was dissolved.
On September 16, 2015, SDD merged with Nintendo Integrated Research & Development (IRD), becoming the Nintendo Platform Technology Development.
From Wikipedia’s article on Nintendo System Development, shared under CC BY-SA 4.0.4