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.
