Nintendo Research & Development 1

Nintendo Research & Development No. 1 Department (commonly abbreviated as Nintendo R&D1 and formerly known as Nintendo Research & Development Department before splitting in 1978) was a division of Nintendo, and is its oldest development team. Its creation coincided with Nintendo's entry into the video game industry, and the original R&D1 was headed by Gunpei Yokoi. The developer has created several notable Nintendo series such as Donkey Kong, Mario, and Metroid.

R&D1 developed the hugely successful Game Boy line, which was released in 1989. They developed some of the line's most popular games, such as Super Mario Land, and created the character of Wario.

Team Shikamaru was a small club within Nintendo R&D1 that was composed of Makoto Kano, Yoshio Sakamoto, and Toru Osawa. The group was responsible for designing characters and coming up with scripts for several games including Metroid, Kid Icarus, Famicom Detective Club, Trade & Battle: Card Hero, and several others.

After Yokoi's resignation in 1996, this group was led by Takehiro Izushi. In 2004, Satoru Iwata restructured the Nintendo R&D1 team. Many of the staff members were later reassigned to the Nintendo SPD team, which in turn merged with Nintendo EAD in 2015 to form Nintendo Entertainment Planning & Development.

In 1965, Nintendo, still primarily a hanafuda card manufacturer, hired Gunpei Yokoi, a newly graduated electronics engineer. Yokoi was assigned to the manufacturing division to work on the assembly line machines used to manufacture its cards. In the following year, Hiroshi Yamauchi, president of Nintendo at the time, during a visit to the factory Yokoi was working at, took notice of a toy, an extending arm, that Yokoi had made for his own amusement during his spare time. As Yamauchi was looking to diversify the company's business far beyond its primary card business, Yokoi was ordered to develop the toy into a proper mass-market product for the 1966 holiday rush. The toy was launched as Ultra Hand and it was a huge success selling over 1.2 million units during its lifetime. Following that, Yokoi was assigned to work on other toys including the Ten Billion Barrel puzzle, a miniature remote-controlled vacuum cleaner called the Chiritori, a baseball throwing machine called the Ultra Machine, and a "Love Tester."

Sometime before 1972, Nintendo created its first electronics development team, the Research & Development department from Nintendo's manufacturing division, assigning Gunpei Yokoi as its general manager. By 1972 the department had approximately 20 developers. In 1978, the manufacturing division split its single research & development department into two, renaming it to Research & Development No. 1 (R&D1) and creating the Nintendo Research & Development No. 2 (R&D2) department. After the split, Yokoi remained general manager of R&D1.

In the late 1970s, Yokoi saw a bored Japanese salaryman playing with a calculator on the Shinkansen high-speed train. This was the inspiration for the creation of the Game & Watch series, a line of handheld electronic games, with each system featuring a single game to be played on an LCD screen in addition to a clock, an alarm, or both. Regardless, it was confirmed that Yokoi was inspired by calculators to develop the line, even using calculator integrated circuits in the systems and button cells to power them. Although Nintendo competitors Mattel and Tomy had already produced portable games, they were mostly bulky systems with low-resolution LED displays and uninspiring gameplay. Yokoi exploited the cheapness of LCDs, producing cheap and light systems, starting in 1980. He would later call this principle Lateral Thinking of Withered Technology: using seasoned technology in radical ways; a principle that echoed throughout Nintendo until the present day.

In 1980, Game & Watch: Ball was the first release of the Game & Watch Silver series, called after its metallic face-plate. Sales weren't reportedly "astonishing", but they were enough to persuade Nintendo to continue developing new titles. The series saw a total of 5 systems, all released during that year. In 1981, Game & Watch: Manhole debuted the Gold series, which was fundamentally the same system with a golden face-plate. It saw only 3 titles which were also released during the same year. In mid-1981, Game & Watch: Parachute was released, debuting the Wide Screen series, sporting a 30% larger display. The series saw a total of 10 titles released until early 1982.